СПОСОБ ОТВЕРЖДЕНИЯ ПРОДУКТА КАЛЬЦИНАЦИИ ГИПСА

Изобретение относится к способу кондиционирования штукатурного гипса, включающему стадии подачи дозы частиц штукатурного гипса в реакционный сосуд, частицы штукатурного гипса включают полугидрат сульфата кальция и/или ангидрит сульфата кальция, а также дигидрат сульфата кальция; и кондиционирования частиц штукатурного гипса при температуре по меньшей мере 100°С и влажности по меньшей мере 70%. Во время стадии кондиционирования частиц штукатурного гипса объемная плотность частиц штукатурного гипса в реакционном сосуде составляет по меньшей мере 1 г/см. Причем влажность, составляющая по меньшей мере 70%, обеспечивается высвобождением молекул химически связанной воды из частиц дигидрата сульфата кальция. Технический результат - снижение общего времени схватывания при сохранении текучести суспензии штукатурного гипса на ранних стадиях процесса. 14 з.п. ф-лы, 6 табл., 18 пр.

СПОСОБ ПОЛУЧЕНИЯ АНГИДРИТСОДЕРЖАЩЕГО ВЯЖУЩЕГО

Изобретение относится к производству гипсовых вяжущих материалов. Способ получения ангидритсодержащего вяжущего включает смешение ангидритсодержащего отхода с тонкоизмельченной известью и последующий помол полученного вяжущего, причем в качестве ангидритсодержащего отхода используют хвосты серно-кислотной переработки боросодержащего минерального сырья следующего состава, мас.%: двуводный гипс 50-56, аморфный кремнезем 16-22, борная кислота 1-2, недоразложившиеся материалы 4-12, ангидрит 11-20. Перед смешением осуществляют сушку указанного отхода при температуре до 100°С. Известь используют в количестве 10-15 мас.% от указанного отхода. Перед помолом полученную смесь выдерживают при температуре до 100°С до полного обезвоживания двуводного гипса. Технический результат - повышение прочности строительных материалов, эффективная утилизация отходов горнохимического производства. 2 табл.

СПОСОБ ПОЛУЧЕНИЯ ВЫСОКОПРОЧНОГО ГИПСА ДЛЯ СТОМАТОЛОГИИ

Изобретение относится к технологии получения гипсовых материалов, используемых в стоматологии для изготовления моделей и для различных технических целей. Способ включает обработку гипсосодержащего брикетированного сырья насыщенным водяным паром при давлении 1,3 атм с последующим высушиванием. Перед заполнением автоклава насыщенным водяным паром под давлением 1,3 ати производится вакуумирование объема автоклава с загруженными в него отпрессованными из исходного сырья брикетами в течение 20 мин. Технический результат - сокращение длительности автоклавного процесса. 1 табл.

СПОСОБ ПОЛУЧЕНИЯ ГИПСОВОЙ ДРЕВЕСНОВОЛОКНИСТОЙ ПРОДУКЦИИ С ПОВЫШЕННОЙ ВОДОСТОЙКОСТЬЮ И СПОСОБ ПОЛУЧЕНИЯ ГИПСОВОГО ДРЕВЕСНОВОЛОКНИСТОГО ЛИСТА С ПОВЫШЕННОЙ ВОДОСТОЙКОСТЬЮ

Изобретение относится к улучшенному композиционному материалу, в частности к композиционному гипсовому древесноволокнистому материалу, в частности к гипсовому древесноволокнистому листу, обладающему повышенной водостойкостью, особенно полезному для изготовления строительной продукции. Способ получения указанного материала включает добавление водной эмульсии силоксана к водной суспензии из сульфатно-кальциевого материала и частиц-хозяина, где указанная суспензия находится при температуре, при которой сохраняются кристаллы полугидрата сульфата кальция, причем указанная силоксановая эмульсия содержит по меньшей мере один модифицированный водородом силоксан, причем указанная силоксановая эмульсия стабильна в условиях, при которых сохраняются кристаллы полугидрата сульфата кальция; поступление указанной силоксансодержащей суспензии на ровную пористую формующую поверхность для получения кека прежде, чем температура указанного кека упадет ниже температуры, при которой полугидрат сульфата кальция ...

СПОСОБ ПОЛУЧЕНИЯ СТРОИТЕЛЬНОГО ГИПСА

Изобретение относится к производству гипсовых вяжущих материалов воздушного твердения, используемых для производства гипсовых изделий главным образом для внутренних частей здания, а также для штукатурных и отделочных работ. В способе получения строительного гипса, включающем нагрев двуводного гипса до температуры 140-190oС с охлаждением и помолом, двуводный гипс фракции 0-25 мм формируют в виде вертикально ориентированных параллельных нисходящих слоев и производят фильтрацию теплоносителя в каждом слое одновременно в прямоточном, противоточном и перекрестноточном направлениях, а теплоноситель в слой гипса подают при двухступенчатом нагреве в интервале температуры 250-700oС. На первой ступени в слой подают теплоноситель с температурой 450-700oС, а на второй - с температурой 250-450oС. Соотношение высоты слоя гипса на первой ступени к высоте слоя на второй ступени составляет 1: 1-5. Охлаждение осуществляют подачей в слой гипса воздуха, который после нагрева в нем смешивают с теплоносителем ...

СПОСОБ ПРОИЗВОДСТВА ГИПСОВОГО ВЯЖУЩЕГО

Изобретение относится к промышленности строительных материалов и может быть использовано для изготовления форм в керамической, фарфоро-фаянсовой и других отраслях промышленности. В способе производства гипсового вяжущего, включающем дробление гипсового камня, разделение полученного гипсового щебня на фракции, гидротермальную обработку фракции гипсового щебня с последующей термообработкой и помолом, разделение гипсового щебня производят на фракцию 0-20 мм и фракцию 20-40 мм, затем гипсовый щебень фракции 20-40 мм подвергают в течение 5-6 часов гидротермальной обработке в интервале температур 120-150°С и давлений 1,1-1,5 атм, после чего гипсовый щебень фракции 20-40 мм смешивают с сырым гипсовым щебнем фракции 0-20 мм в соотношении соответственно (1-3):1 частей по массе, далее осуществляют термообработку полученной смеси при температуре 120-150°С во вращающейся печи. Технический результат - повышение однородности гипсового вяжущего, снижение содержания в нем двуводного сульфата кальция, увеличение ...

СПОСОБ ПОЛУЧЕНИЯ ВЫСОКОПРОЧНОГО ГИПСА

Настоящее изобретение относится к способу получения высокопрочного гипса варкой в жидких средах при атмосферном давлении. Технический результат заключается в наибольшей степени конверсии двуводного гипса, эффективной предварительной обработке двуводного гипса перед варкой. Способ включает предварительную механическую активацию двуводного гипса и последующую обработку активированного двуводного гипса водой при температурах 97-100°C в течение 4 часов, причем последующей обработке подвергают двуводный гипс, в котором количество запасенной энергии, соответствующее изменению межплоскостных расстояний кристаллической решетки, не менее 312 кДж/моль и суммарное количество энергии, соответствующее изменению поверхности областей когерентного рассеяния и микродеформаций, в диапазоне от 5,6 до 5,8 кДж/моль. 4 з.п. ф-лы, 1 табл.

СПОСОБ ПОЛУЧЕНИЯ ВЫСОКОПРОЧНОГО ГИПСОВОГО ВЯЖУЩЕГО

Изобретение относится к способам получения строительного материала, а именно высокопрочного гипсового вяжущего. В способе получения высокопрочного гипсового вяжущего, включающем измельчение гипсового сырья, обработку органическими кислотами и последующую тепловую обработку паром под давлением в автоклаве, измельчение осуществляют до фракции 0-0,63 мм на бегунах тонкого помола с образованием дефектной кристаллической структуры при одновременной обработке указанного сырья органическими кислотами. Технический результат - повышение прочности гипсового вяжущего и увеличение объема перерабатываемого гипсового сырья. 2 табл., 2 ил.

СПОСОБ ПОЛУЧЕНИЯ ГИПСОВОГО ВЯЖУЩЕГО И СВЧ-ПЕЧЬ ДЛЯ ПОЛУЧЕНИЯ ГИПСОВОГО ВЯЖУЩЕГО

Использование: строительная индустрия, промышленность, выпускающая медицинский гипс, а также фарфоро-фаянсовая промышленность. Сущность изобретения: способ получения гипсового вяжущего заключается в термической обработке гипсового камня путем облучения электромагнитным полем СВЧ-диапазона Hmo типом волн мощностью 110 130 Вт/кг в течение 20 30 мин. СВЧ-печь содержит излучатель 1 электромагнитных волн, основной элемент 2, нагрузочный элемент 3, входной запредельный волновод 4, выходной запредельный волновод 5, преобразователь 6 волн СВЧ. 2 с. п. ф-лы, 2 ил.

УСТАНОВКА ДЛЯ ДЕГИДРАТАЦИИ АЛЬФА-ГИПСА

Изобретение относится к химической промышленности, в частности может быть использовано в производстве строительных материалов. Установка для дегидратации гипса содержит корпус, разделенный на последовательно расположенные секции предварительного обжига и дегидратации, снабженные индивидуальным подводом тепла в каждую из секций, причем тепловые трубы расположены каскадно с размещенными на них греющими площадками, чередующимися по высоте каскада в виде колец и дисков, а над каждой площадкой имеется криволинейная лопасть, изогнутая внутрь над кольцевой площадкой и наружу над диском. В каждой из секций установлены датчики температур, а разгрузочный транспортер имеет рубашку охлаждения. Образование α-гипса обеспечивается за счет регулирования зон прогрева, увеличения поверхности греющих площадок и каскадного движения гипса, а также вследствие снижения его температуры на разгрузочном транспортере. 3 ил.

СПОСОБ ПОЛУЧЕНИЯ ВОДОСТОЙКИХ ГИПСОВЫХ ИЗДЕЛИЙ

Изобретение относится к области производства высокопрочных гипсовых изделий, может найти применение в производстве строительных материалов и других отраслях промышленности. Технический результат заключается в создании высокоэффективного способа получения водостойких гипсовых изделий с высокими физико-механическими свойствами, утилизации отходов шахтных выработок и шлака ферросплавного производства при существенном снижении затрат на изготовление изделий. Способ получения высокопрочных водостойких гипсовых изделий характеризуется тем, что осуществляют нейтрализацию кислых шахтных вод самораспадающимся шлаком ферросплавного производства с образованием влажного гипсосодержащего шлама, выдерживают шлам в емкости в течение 10-12 суток, отжимают лишнюю воду до остаточной влажности 40-45% и из образовавшейся пасты формуют изделия заданной конфигурации, которые подвергают сушке в форме при комнатной температуре в течение суток, а затем подвергают автоклавной обработке.

Гидростатический автоклав непрерывного действия для производства высокопрочного гипса в жидкой среде

Способ перемешивания гипсовой суспензии

Способ получения строительного гипса

СПОСОБ ОБЖИГА ГИПСА

Способ получения высокопрочного гипса

Способ сушки гипсового камня

Способ получения высокопрочного гипсового вяжущего

METHOD OF PREPARING OF GYPSUM DEHYDRATE FROM THE SLIME-WASTE OF ETCHING MANUFACTURE

Способ получения высокопрочного гипсового вяжущего

СПОСОБ ПОЛУЧЕНИЯ ВЫСОКОПРОЧНОГО ГИПСОВОГО ВЯЖУЩЕГО, включающий пропарку кускового природнО го двуводного топса фракции 40-60 мм при давлении 0,12 - 0,13 МПа и последующую сушку насыщенным перегретым паром при температуре 140-170 С, от л и ч а ю щ и и с я тем, что, с иел4|Ю увеличения производительности , пропарку ведут в течение 1,5 2 .0 ч, затем давление увеличивают до 0,7 0 ,8 МПа а течение 0.5-1,0 ч, после чего давление снижают до атмосферного в течение 0,3 - 0,5 ч и сушку ведут в течение 2,5 3 ,0ч.

Способ получения гипсового вяжущего

Способ получения гипсового вяжущего из фосфогипса

Изобретение относится к технологии производства вяжущих материалов и может быть использовано в промышленности строительных материалов и минеральных .удобрений. Целью изобретения является улучшение вяжущих свойств продукта. Поставленная цель достигается тем, что в известном способе получения вяжущего на основе фосфогипса, включающем нейтрализацию фосфогипса в водной суспензии известковым молоком, последующее отделение фосфогипса от жидкой фазы, интенсивную дегидратацию в трубе-сушилке продуктами сгорания топлива и размол продукта дегидратации, новым является то, что размол осуществляют в присутствии микро- мелющих тел, например частиц кварцевого песка размером (0,1-1,0) х 10 м, при этом массовое соотношение дегидратированного фосфогипса (ДФГ) и микромелющих тел (МГ) поддерживают в пределах ДФПМТ - 1:(0.05-1,7). 1 табл. (А С ...

Способ формования гипсовыхиздЕлий

Способ получения ангидритового цемента

Verfahren zur Herstellung von schwerlöslichem Calciumsulfat-Anhydrit-II

PROCESS FOR WELDING GYPSUM BODIES

VERFAHREN ZUR HERSTELLUNG ABBINDEFAEHIGER BAUSTOFFE AUS ALPHA-CALCIUMSULFATHEMIHYDRAT

Verfahren zur Herstellung einer Gips-Holzfaserprodukt mit verbesserter Wasserbeständigkeit

PROCESS AND APPARATUS FOR PRODUCING CALCIUM SULPHATE HEMIHYDRATE IN THE ALPHA-CONFIGURATION

Calcium sulphate

A process and apparatus for producing calcium sulphate hemihydrate in the alpha-configuration includes transferring open vessel of calcium sulphate dihydrate into an autoclave, autoclaving with pressurised steam removing vessel from autoclave and discharging material directly into heated trough, transferring to a heated conveyor into a dryer.

Method of dehydrating gypsum

... In the dehydration of gypsum to the hemihydrate in a sealable indirectly heated vessel which is alternately sealed for at least 3 minutes and then vented until the desired dehydration has occured, a minimum positive gauge pressure is maintained in the vessel until the dehydration is completed. The temperature is maintained below 330 DEG F. during the alternate venting and sealing but finally when the dehydrating chamber is sealed the temperature rises to 330 DEG F. whilst the pressure remains below that previously attained. Venting is generally effected at 30 to 40 p.s.i.g. The minimum gauge pressure is generally from 4 to 6 p.s.i.g. and the temperature on venting should not drop below 212 DEG F. The apparatus employed is the same as that disclosed in Specifications 866,126, 897,923 and 897,924. As shown in Figs. 1 and 2, a drum 7 is supported by and rotated with an axial pipe 21 which rests on rollers 5 carried by support 2. Inside the drum the ...

CALCINATION METHOD AND APPARATUS

CALCIUM SULPHATE ALPHA-HEMIHYDRATE

An improved method of producing plaster of paris, modelling plaster or other kinds of plaster

Plaster of paris or other similar plaster is obtained by grinding and calcining crude gypsum in an air current mill fed with hot gases. The latter may be supplied to the mill itself or be introduced into the issuing stream of ground particles. Open or closed circuit working for the gases may be employed.ALSO:Plaster of Paris or other similar plaster is obtained by grinding and calcining crude gypsum in an air current mill fed with hot gases. The latter may be supplied to the mill itself or be introduced into the issuing stream of ground particles. Open or closed circuit working for the gases may be employed.

Improvements in or relating to the burning of gypsum

Hard model and hard moulding gypsums are prepared by heating crude gypsum in an indirectly heated autoclave, in which the pressure generated inside the autoclave, mainly by vaporized water of crystallization, is released, when a selected value has been reached, by blowing off steam, thereby reducing the pressure to substantially atmospheric, and repeating this procedure until the desired gypsum is obtained. The gypsum is then dried by heating at atmospheric pressure. A small amount of water may be added to the crude gypsum prior to heating. The drying is conveniently carried out in a separate vessel heated externally by steam. The gypsum may be comminuted prior to drying. In an example, gypsum is heated to a maximum temperature of 175 DEG C. for 1 1/2 hours, the steam being blown off when a pressure of 6 atmospheres is reached. This is repeated twice, the gypsum is then comminuted to pea-sized grains, and is dried in a steam-heated vessel at a temperature not exceeding 175 DEG C.

PROCESS FOR THE MANUFACTURE OF HARD GYPSUMS

MANUFACTURING AN HYDRAULIC BINDER

PROCESS FOR THE CONVERSION OF GYPSUM INTO CALCIUM SULPHATE HEMIHYDRATE

LOWER HEAT PROCESSED CALCIUM SULPHATES FOR EARLY STRENGTH CEMENTS AND GENERAL USE

LOWER HEAT PROCESSED CALCIUM SULPHATES FOR EARLY STRENGTH CEMENTS AND GENERAL USE

Method of preparation of a new plaster, furnace for the implementation of the known as process and application of the known as new plaster.

Method of preparation of calcium sulphates dehydrated starting from phosphogypsums.

Process and installation of treatment of a pulverulent matter containing new calcium sulphate hydraulic binding

LOWER HEAT PROCESSED CALCIUM SULPHATES FOR EARLY STRENGTH CEMENTS AND GENERAL USE

PROCEDURE FOR THE PRODUCTION OF A HYDRAULIC BONDING AGENT

VERFAHREN UND VORRICHTUNG ZUM HERSTELLEN VON MEHRPHASENGIPSEN

VERFAHREN UND VORRICHTUNG ZUM BRENNEN VON PUTZGIPS

VERFAHREN ZUR HERSTELLUNG EINES HYDRAULISCHEN BINDEMITTELS

PROCEDURE AND DEVICE FOR CALCINING GYPSUM

PROCEDURE FOR IMPROVING THE CHARACTERISTICS OF A BY DEHYDROGENATION OF A PHOSPHOGIPSES RECEIVED GYPSUM

PROCEDURE AND DEVICE FOR THE PRODUCTION OF GYPSUM PRODUCTS.

PROCEDURES AND DEVICE FOR REMOVING PRACTICE WATER FROM A WATER GYPSUM MIXTURE AND THEREBY MANUFACTURED PRODUCTS.

PROCEDURE FOR THE PRODUCTION OF CALCIUM SULFATE ANHYDRITE.

PROCEDURE FOR MANUFACTURING GYPSUM FIBER BOARDS.

PROCEDURE AND ARRANGEMENT FOR THE PRODUCTION OF ALPHA CALCIUM SULFATE HEMIHYDRATE USING WITH OF THE WET FLUEGAS DESULPHURATION (REA) OF A FOSS

CALCINATION OF GYPSUM

Calcium sulfate hemihydrate treatment process

DRYING PLASTER BOARD

COMPOSITE MATERIAL AND METHOD OF PRODUCING

PURIFICATION OF GYPSUM

CALCINING CALCIUM SULPHATE DIHYDRATE

CALCINING CALCIUM SULPHATE DIHYDRATE

Method and apparatus for the continuous calcination of calcium sulphate dihydrate (gypsum) to hemihydrate plaster by heating A bed of gypsum in a kettle to the required calcination temperature at least in part by means of hot gas continuously introduced into the bed, moisture (e.g. in the form of water droplets or steam) being sprayed into the gaseous phase (e.g. into the hot gas before contact with the bed and/or into exhaust gas above the bed) to reduce the degree of production of insoluble anhydrite.

CONTINUOUS CALCINING OF FINELY GROUND GYPSUM

CONTINUOUS CALCINING OF FINELY GROUND GYPSUM Calcining finely ground gypsum by heating a continuously fed mass of gypsum in a kettle, maintaining the lower portion of the mass at about 155.degree.C, and repeatedly discharging minor quantities from the bottom of the mass by a controlled repeated opening and closing of a plug in the kettle bottom portion.

LIGHTWEIGHT JOINT COMPOUND HAVING IMPROVED PAINTABILITY

LIGHTWEIGHT JOINT COMPOUND HAVING IMPROVED PAINTABILITY Expanded perlite coated with a composition to render the perlite impervious to water, and a joint compound incorporating the same. The perlite is ground prior to expansion to provide subsequently expanded perlite having a mean particle size from about from about 50 to about 70 microns, the joint compound formed from the perlite having greater uniformity in paint gloss appearance between the painted surface of the joint compound and the painted surface of the gypsum wallboard on which the joint compound is applied.

CALCINING CALCIUM SULPHATE DIHYDRATE

METHOD FOR THE PRODUCTION OF HARD GYPSUM

FOAMING PLASTER

A method of producing a foamed plaster comprises the following steps: (a) mixing plaster of Paris and calcium carbonate; (b) supplying water; and (c) adding phosphoric acid. The phosphoric acid reacts with the calcium carbonate to release gaseous carbon dioxide. It also reacts with any steel present to form an insoluble iron phosphate coating.

PROCESS FOR MANUFACTURING ULTRA LOW CONSISTENCY .ALPHA.- AND .BETA.- BLEND STUCCO

A process is disclosed for making a blend of alpha- and beta-stucco including a slurry calcination step to produce alpha calcium sulfate hemihydrate followed by a fluidized bed calcination step to produce beta calcium sulfate hemihydrate. The process starts with 50-75% gypsum-containing solids slurry, and then steam calcines the slurry in a first reactor to form partially calcined gypsum slurry which contains calcium sulfate dihydrate and alpha calcium sulfate hemihydrate. The partially calcined slurry is then dewatered. Then the filter cake is fed into a kettle to complete the calcination process by converting the calcium sulfate dihydrate of the filter cake material into beta calcium sulfate hemihydrate.

LOWER HEAT PROCESSED CALCIUM SULPHATES FOR EARLY STRENGTH CEMENTS AND GENERAL USE

The Invention is related to increasing of early strength and final strengths of cements classified under EN and ASTM as Portland or CEM cements and also related to all clinker employing cements and to any kinds which employ calcium sulphates for set optimization and is for composing of new cements by only assesing new methods for production and is for composing of new cements by only assessing new methods to formation and inclusion of calcium sulphate resources which are used for set optimization.A new calcium sulphate resource is obtained by employing lower heats and this input is arranged to different dehydration levels at which they can be most efficient for the selected use. These different dehydration levels are called intermediate phases of dehydrate or hemihydrates or called as monohydrate.. The Invention clarifies a well defined reactivity power concept which was not defined by the existing scientific basis. As a result, cements which have much higher early strengths than the known ...

Verfahren zur Herstellung von Gipsbinden.

Verfahren zur Herstellung von a-Calciumsulfat-Halbhydrat

Procédé de cuisson du plâtre à basses températures

METHOD OF HEAT TREATMENT EQUIPMENT AT THE PARTICLES AND APPARATUS FOR IMPLEMENTATION.

PROCEDURE FOR THE PRODUCTION OF CALCIUM SULFATE ALPHAHEMIHYDRATE FROM PURIFY-HASTY CALCIUM SULFATE DIHYDRATE.

METHOD AND DEVICE FOR PRODUCING CEMENT

METHOD AND INSTALLATION FOR CALCINATION

TREATED AT LOW TEMPERATURES SULFATES CALCIUM FOR RAPIDLY HARDENING CEMENTS AND TOTAL APPLICATION

ПОЛИМЕРИЗАЦИЯ СИЛОКСАНА B СТЕНОВЫХ ПЛИТАХ

Полимеризация силоксана ускоряется вследствие использования суспензии, включающей штукатурный гипс, зольную пыль класса С, оксид магния, эмульсию силоксана и воду. Указанную суспензию используют в соответствии со способом изготовления водостойких гипсовых изделий, включающий приготовление эмульсии силоксана в воде, соединение суспензии с сухой смесью штукатурного гипса, оксида магния и зольной пыли класса C. Затем суспензии придают нужную форму и дают время для схватывания гипса и полимеризации силоксана. Полученный продукт годен к изготовлению водостойких гипсовых панелей, сердцевина которых состоит из взаимопроникающих матриц кристаллов двухводного гипса и кремнийорганической смолы, где внутри взаимопроникающих матриц распределен катализатор, включающий оксид магния и компоненты зольной пыли класса C.

СПОСОБ ПОЛУЧЕНИЯ ГИПСОВОГО ВЯЖУЩЕГО ИЗ ОТХОДОВ, СОДЕРЖАЩИХ ГИПС

Способ получения гипсового вяжущего из гипсосодержащих отходов включает предварительную оптимизацию кристаллической структуры исходного сырья и последующую термообработку в гипсоварочном котле. Оптимизацию кристаллической структуры проводят уплотнением прессованием под давлением 40 - 50МПа при влажности сырья 6 - 9% с последующим измельчением последнего до удельной поверхности 6000 - 10000 см2/г.

СПОСОБ ОБРАБОТКИ ПОЛУГИДРАТА СУЛЬФАТА КАЛЬЦИЯ

Изобретение относится к способу получения обработанного бета-полугидрата сульфата кальция, включающего его обработку паром при выходной температуре в диапазоне между 100-200оС в автоклаве при действии повышенного давления и в течение времени, достаточного для обработки, но не менее 5 секунд, водной суспензии на основе полученного продукта и способа изготовления из указанного полугидрата гипсового продукта.

СПОСІБ ОДЕРЖАННЯ В`ЯЖУЧОГО ІЗ ФОСФОГІПСУ

Спосіб одержання в'яжучого із фосфогіпсу включає подрібнення, висушування, дегідратацію вихідної сировини в присутності добавки і помел одержаного в'яжучого в присутності добавки. Подрібнення грудкового фосфогіпсу здійснюють до фракції 0,1-0,3 мм. Висушування одержаної фосфогіпсової маси проводять з доведенням фізико-хімічно незв'язаної вологи в ній до 0,1-0,7 %. Дегідратацію фосфогіпсової маси проводять при температурі 100-120 °С з використанням як добавки 0,1-0,9 % кухонної солі, а помел одержаного в'яжучого проводять протягом 1-2 хвилин з використанням як добавки крейдового порошку в кількості 1,0-2,5 % від вихідної маси фосфогіпсу.

СПОСОБ И УСТРОЙСТВО ДЛЯ ПОЛУЧЕНИЯ ЦЕМЕНТА

Предметом изобретения является способ получения цемента (9). При этом цементный клинкер (1) и сульфатсодержащий материал (11), а также при необходимости другие составляющие (2, 12) размалываются вместе в валковой мельнице (5) до состояния муки. Сульфатсодержащий материал (11) нагревают, обезвоживают и обжигают до желаемой степени в отдельной установке (10), сразу после этого транспортируют на валковую мельницу (5) и размалывают там вместе с остальными компонентами.

СПОСОБ ПОЛУЧЕНИЯ ВЫСОКОКРЕПКОГО ВОДОСТОЙКОГО ГИПСА ПО ПУЛИНУ И.Б.

Изобретение относится к промышленности строительных материалов. Гипсовый камень подвергают тепловой обработке, сначала по принципу противотока, затем по принципу прямотока, а затем в процессе измельчения, причем температура тепловой обработки не должна превышать 65°С.

СПОСОБ ПОЛУЧЕНИЯ ВЫСОКОПРОЧНОГО ГИПСА

Изобретение относится к промышленности строительных материалов и может быть использовано в производстве высокопрочного гипсового вяжущего, получаемого варкой в жидких средах. В способе получения высокопрочного гипса в жидких средах при атмосферном давлении в присутствии кристаллической затравки (α - полугидрата) для варки используют гипсовый камень, предварительно измельченный и отсепарированный до частиц размером 0,315-0,63 мм, варку ведут в растворе хлористого кальция с концентрацией 50%, обеспечивающей температуру парообразования кристаллизационной воды дигидрата в 107-113°С, а фильтрацию, промывку и сушку с одновременным домолом частиц α - полугидрата производят быстро с применением температур теплоносителя в пределах 100-107°С. Технический результат - значительное повышение прочности гипсового вяжущего.

СПОСОБ ПОЛУЧЕНИЯ ГИПСОВОГО ВЯЖУЩЕГО

Изобретение относится к гипсовой промышленности. Способ включает совмещенный помол и сушку в шахтной мельнице гипсового сырья, введение добавки хлорида натрия, тепловую обработку при атмосферном давлении. Помол и сушку осуществляют в течение 2-4 с при температуре теплоносителя на входе 400-600° и 90-100°С на выходе из шахтной мельницы, а хлорид натрия вводят в сухом виде в гипсовое сырье при помоле в количестве 0,07-0,09%.

СПОСІБ ВИРОБНИЦТВА В'ЯЖУЧОГО ІЗ ФОСФОГІПСУ

Спосіб виробництва в'яжучого із фосфогіпсу включає подрібнення, висушування, дегідратацію вихідної сировини і помел одержаного в'яжучого. Дрібнення грудкуватого фосфогіпсу здійснюють до фракції 0,3-1,0 мм і одержану фосфогіпсову масу висушують з доведенням фізико-хімічно непов'язаної вологи в ній до 0,2-1,0 %, після чого проводять дегідратацію фосфогіпсової маси при температурі 140-160 °С з додаванням 1,0-2,0 % змеленого вапняку. Потім одержане в'яжуче подрібнюють протягом 1,0-2,0 хвилин і одночасно додають до суміші змелений кварцовий порошок в кількості 8,0-10,0 % від вихідної маси фосфогіпсу.

СОДЕРЖАЩАЯ ГИПС СУСПЕНЗИЯ, ГИПСОВЫЙ ОБШИВОЧНЫЙ ЛИСТ И СПОСОБ ИЗГОТОВЛЕНИЯ ГИПСОВОГО ОБШИВОЧНОГО ЛИСТА

Изобретение в общем предоставляет содержащие гипс суспензии, включающие алебастр, триметафосфатную соль и нафталинсульфонатный диспергирующий агент, в которых триметафосфатная соль присутствует в количестве по меньшей мере примерно 0,12% масс. в расчете на массу алебастра. Другие добавки к суспензии могут включать ускорители, связующие, крахмал и бумажное волокно, стекловолокно и другие известные ингредиенты. Изобретение также включает содержащие гипс изделия, изготовленные с указанными суспензиями, например, гипсовый обшивочный лист, и способ изготовления гипсового обшивочного листа.

СУСПЕНЗИЯ, СПОСОБ ИЗГОТОВЛЕНИЯ ВОДОСТОЙКИХ ГИПСОВЫХ ИЗДЕЛИЙ И ВОДОСТОЙКАЯ ГИПСОВАЯ ПАНЕЛЬ

Полимеризация силоксана ускоряется в результате использования суспензии, содержащей штукатурный гипс, зольную пыль класса С, оксид магния, эмульсию силоксана и воду. Указанную суспензию используют в соответствии со способом изготовления водостойких гипсовых изделий, включающим приготовление эмульсии силоксана в воде, соединение суспензии с сухой смесью штукатурного гипса, оксида магния и зольной пыли класса С. Затем суспензии придают нужную форму и дают время для схватывания гипса и полимеризации силоксана. Полученный продукт пригоден для изготовления водостойких гипсовых панелей, сердцевина которых состоит из взаимопроникающих матриц кристаллов двуводного гипса и кремнийорганической смолы, где внутри взаимопроникающих матриц распределен катализатор, включающий оксид магния и компоненты зольной пыли класса С.

Способ получения гипсового вяжущего

Использование: промышленность строительных материалов. Задача: разработка способа, позволяющего получить вяжущее с низкой себестоимостью и высокими физико-механическими свойствами. Сущность изобретения: способ получения гипсового вяжущего включает тепловую обработку измельченного гипсового сырья при атмосферном давлении. Измельчение ведут в ролико-маятниковой мельнице, а в качестве гипсового сырья используют гипсовый щебень, содержащий до 5% ангидрита. 1 н.п. ф-лы, 3пр., 4 табл.

Способ получения α-полугидрата сульфата кальция

Способ получения α-полугидрата сульфата кальция, при котором проводят перекристаллизацию гипсосодержащего сырья в растворе сульфата магния концентрацией 15-25 % в течение 30-60 мин в присутствии затравочных кристаллов α-полугидрата, взятых в количестве 3-5 % от массы гипсосодержащего сырья, и отделяют готовый продукт на фильтре двукратной промывкой, при этом в качестве гипсосодержащего сырья используют синтетический гипс, полученный смешиванием при температуре 70 °С концентрированной серной кислоты и доломитовой суспензии, приготовленной из промывных вод, образующихся при промывке α-полугидрата сульфата, и доломитовой муки при их соотношении 3:1.

СПОСІБ ВИГОТОВЛЕННЯ БУДІВЕЛЬНИХ ВИРОБІВ З ФОСФОГІПСУ

Спосіб виготовлення будівельних виробів з фосфогіпсу включає нейтралізацію, дегідратацію фосфогіпсу та формування з нього виробів. Дегідратацію фосфогіпсу здійснюють при натуральній вологості фосфогіпсу в високоенергонапружених апаратах, що створюють механохімічну активацію. Формування виробів здійснюють після введення наповнювачів методом віброекструзії.

ОБРАБОТАННЫЕ ПРИ НИЗКИХ ТЕМПЕРАТУРАХ СУЛЬФАТЫ КАЛЬЦИЯ ДЛЯ БЫСТРОТВЕРДЕЮЩИХ ЦЕМЕНТОВ И ОБЩЕГО ПРИМЕНЕНИЯ

Изобретение относится к повышению ранней прочности и конечных прочностей цементов европейских стандартов и стандартов ASTM, например портландцементов или цементов типа CEM, а также относится к клинкерным цементам и цементам любого типа, использующим сульфаты кальция, для оптимизации схватывания и для составления новых цементов всего лишь путем определения новых способов получения и введения источников сульфата кальция. Новый источник сульфата кальция получают, используя низкие температуры термообработки, и полученный продукт соотносят с различными уровнями дегидратации, при которых они могут быть наиболее эффективны для выбранной цели. Продукты, образуемые при этих различных уровнях дегидратации, называют промежуточными фазами дигидратов, полугидратами или моногидратами. Изобретение разъясняет четко определенное понятие степени реакционной способности, которое не было определено существующими научными знаниями. В результате можно получать цементы с гораздо более высокими ранними прочностями ...

Powder Lime Calcining Process and System

A powder lime calcining process comprises: transporting fine granules of limestones having a water content less than 4%, and a granule size less than 15 mm, from a raw material storing bin to a small material bin, transporting the materials from the small material bin into an airflow pipe by a belt conveyer, heating and drying the materials, sieving the materials by a sieving device, transporting granules into a cyclone cylinder deduster and a clothbag deduster in turn by airflow pipes, the fine powders of limestones after dedusted are transported into an intermediate bin; the materials within the intermediate bin are transported to four preheating cyclone cylinders by a pneumatic lift pump and airflow pipes, and are preheated and separated; the materials after separated are transported into three cooling cyclone cylinders for cooling and separating the materials, finally transported into a finished product bin by a finished product transporting system. 1. A powder lime calcining process comprising: transporting fine granules of limestones having a water content less than 4% , and a granule size less than 15 mm , from a raw material storing bin to a small material bin , transporting the materials from the small material bin into airflow pipes by a belt conveyer , heating and drying the materials within the pipes , and sieving the materials , wherein coarser granules having a granule size more than 3 mm are transported into a breaking machine for breaking , finer granules having a granule size less than 3 mm are transported by airflow pipes into a cyclone cylinder deduster and a clothbag deduster in turn; the fine powders of limestones adapting to be calcined in a kiln after dedusted , collected , dried and broken are transported into an intermediate bin , where the fine powders of limestones having a water content less than 1% , and a granule size less than 3 mm; the materials within the intermediate bin are transported to four preheating cyclone cylinders disposed ...

MANNER OF OBTAINMENT OF BINDING AGENT FOR MASS FOR PRODUCTION OF SHAPED CONSTRUCTION ELEMENTS AND BINDING AGENT FOR MASS FOR PRODUCTION OF SHAPED CONSTRUCTION ELEMENTS

The invention solves the problem of the manner of obtainment of mass for production of shaped construction elements. The manner consists of the fact, that in the mechanical mixer a ceramic granulate is placed, preferably in the form of pearlite and is soaked, preferably with water until complete soaking of the granulate and is mixed with the binding agent until obtainment of the situation, where each loose grain () of the granulate is coated with a layer of moist binding agent, creating a coating () around the grain. Priorly prepared moulds are filled with the obtained mass. The mass for production of shaped construction elements consists of 15-25% of bond weight, preferably in the form of pearlite, 35-45% of binding agent weight, preferably in the form of plaster with improved resistance parameters and 35-45% of water weight. 1123. The manner of obtainment of mass for production of shaped construction elements , characterized in that , that in the mechanical mixer ceramic granulate is placed in the form of pearlite and is soaked , preferably in water , until complete soaking of the granulate and is mixed with the binding agent , preferably with plaster of higher class until obtainment of the situation where each loose grain () of the granulate will be coated with a layer of moist binding agent , creating a coating () around the grain , after which the obtained mass is placed with priorly prepared moulds until full and then it is stress treated until obtainment of connection of the grains with parts of their surfaces , so that there is free space () maintained between the grains , filled with air.2. The mass for production of shaped construction elements , characterized in that , that it consists of 15-25% of bond weight , preferably in the form of pearlite , 35-45% of binding agent weight , preferably in the form of plaster with improved resistance parameters and 35-45% of water weight. The subject matter of the invention is the manner of obtainment of mass for ...

CARBON DIOXIDE PRODUCTION

Apparatus for the production of carbon dioxide from limestone includes a nuclear reactor () for generating heat and a rotary kiln (). The rotary kiln () has an inlet () for the introduction of limestone and an outlet () for the release of carbon dioxide. A heat transfer arrangement is provided for transferring heat from the nuclear reactor () to the interior of the rotary kiln (). The heat transfer arrangement includes feed and return primary conduits () for passing a heat transfer fluid () through the nuclear reactor () so that heat may be extracted from the nuclear reactor () for transfer to the interior of the rotary kiln (). Limestone in the rotary kiln () is thereby heated to a temperature sufficient for the release of carbon dioxide. 1. Apparatus for the production of carbon dioxide from limestone , comprising:a nuclear reactor for generating heat;a rotary kiln having an inlet for the introduction of limestone and an outlet for the release of carbon dioxide; anda heat transfer arrangement for transferring heat from the nuclear reactor to the interior of the rotary kiln, the heat transfer arrangement including feed and return primary conduits for passing a heat transfer fluid through the nuclear reactor to extract heat therefrom for transfer to the interior of the rotary kiln thereby to heat the limestone to a temperature sufficient for the release of carbon dioxide.2. Apparatus as claimed in claim 1 , wherein the heat transfer arrangement includes a heat exchanger through which the heat transfer fluid is passed for the supply of heat from the nuclear reactor to the heat exchanger.3. Apparatus as claimed in claim 2 , wherein the heat exchanger comprises a water boiler to generate steam and a secondary conduit for the steam generated by the boiler claim 2 , to feed steam to the rotary kiln for heating limestone therein.4. Apparatus as claimed in claim 3 , wherein the secondary conduit comprises a feed secondary conduit for the supply of steam to the rotary kiln ...

Plant for producing cement with central grinding unit

A plant for producing cement, having a first stage for crushing raw material to form raw powder, a second stage for calcination and sintering of the raw powder to form cement clinker, a third stage for cooling the sintered cement clinker, and a fourth stage for crushing the sintered cement clinker to form cement. The first stage for crushing raw material to form raw powder and the fourth stage for crushing the sintered cement clinker to form cement are structurally combined. In this way, during servicing or repair of one crushing stage, the plant need not be shut down because, y variable circuitry switching, the crushing stages permit plant operation with reduced production output. 15-. (canceled)6. A plant for producing cement , comprising:a first stage for crushing raw material to form raw powder,a second stage for calcining and sintering the raw powder to form cement clinker,a third stage for cooling the sintered cement clinker, anda fourth stage for crushing the sintered cement clinker to form cement,wherein the first stage for crushing raw material to form raw powder and the fourth stage for crushing the sintered cement clinker to form cement are combined structurally.7. The plant as claimed in claim 6 , wherein the first stage for crushing raw material to form raw powder and the fourth stage for crushing the sintered cement clinker to form cement are each constructed as a circulating grinding system with separators claim 6 , wherein at least one gas feed line leads from the remaining stages of the plant into the first stage and into the fourth stage claim 6 , and conduct gas for separating the circulating grinding systems of the first stage and fourth stage.8. The plant as claimed in claim 7 , wherein the separators are separated structurally from the first stage for crushing raw material to form raw powder and from the fourth stage for crushing the sintered cement clinker to form cement.9. The plant as claimed in claim 8 , wherein the separator for the first ...

LONG FLAME PROCESS HEATER

A flame used to heat a process material may be extended or otherwise shaped by the application of voltages using electrodes. 1. A long flame process heater , comprising:a burner configured to support a flame along an axis substantially parallel to a process material;a charge electrode configured to impart a first polarity voltage or majority charge to the flame; anda field electrode disposed distal to the burner and configured to electrically attract the first polarity voltage or majority charge with a second voltage different from the first voltage and to thereby cause the flame to extend toward the field electrode.2. The long flame process heater of claim 1 , wherein the second electrode is configured to carry a voltage having a second polarity opposite to the first polarity.3. The long flame process heater of claim 1 , wherein the second electrode is configured for electrical continuity with a voltage ground.4. The long flame process heater of claim 1 , further comprising:a process material support mechanism or conveyor configured to support or convey the process material while it is exposed to radiation heat transfer from the flame.5. The long flame process heater of claim 4 , wherein the process material support mechanism includes a rack configured to support a batch of process material.6. The long flame process heater of claim 4 , wherein the conveyor includes a rotating kiln shell.7. The long flame process heater of claim 1 , wherein the charge electrode and the field electrode are configured to cooperate to draw the flame to a stable length longer than a stable length achievable without the cooperation of the charge electrode and the field electrode.8. The long flame process heater of claim 1 , wherein the charge electrode and the field electrode are configured to cooperate to draw the flame to a stable length having at least one of less flicker or less length variation than a stable length achievable without the cooperation of the charge electrode and the ...

AQUEOUS GYPSUM PLASTER-CEMENT COMPOSITION AND ITS USE

An aqueous gypsum plaster-cement composition comprises a hydraulic binder consisting of calcined gypsum and hydraulic cement in a weight ratio of from about 4:1 to about 2:1, an aggregate which comprises sand, a foam, a perlite, rice hulls or a mixture thereof, a superplasticizer comprising an air entraining agent, a retarder, and water in an amount of from about 0.4 to about 0.75 parts by weight per part of binder, with the proviso that the gypsum plaster-cement composition contains essentially neither a pozzolana nor lime. The use thereof, a method of constructing buildings using this composition and the buildings obtainable in this way are also described. 1. An aqueous gypsum plaster-cement composition comprising:a hydraulic binder comprising calcined gypsum and hydraulic cement in a weight ratio of from about 4:1 to about 2:1;an aggregate comprising at least one of sand, a foam, a perlite, and rice hulls;a superplasticizer comprising an air entraining agent;a retarder; andwater in an amount of from about 0.4 to about 0.75 parts by weight per part of binder,wherein the gypsum plaster-cement composition comprises essentially neither a pozzolana nor lime.2. The gypsum plaster-cement composition as claimed in claim 1 , further comprising polymer fibers.3. The gypsum plaster-cement composition as claimed in claim 1 , wherein the composition is sprayable.4. The gypsum plaster-cement composition as claimed in claim 1 , wherein the aggregate comprises sand claim 1 , and wherein the aggregate is present in the gypsum plaster-cement composition in a weight ratio to the binder of from about 3.5:2 to about 2.5:2.5. The gypsum plaster-cement composition as claimed in claim 1 , wherein the aggregate comprises at least one of expanded polystyrene claim 1 , expanded perlite claim 1 , and rice hulls.6. The gypsum plaster-cement composition as claimed in claim 5 , wherein each of the at least one of expanded polystyrene claim 5 , expanded perlite and rice hulls are present in the ...

Method and Device for Producing Cement Clinker

In a device for baking of clinker in a clinker, the heat generated in the furnace can be used in a particularly efficient and versatile manner if heat generated in the furnace is transferred, by means of a first heat exchanger, to a heat carrier fluid, the heated heat carrier fluid is transported through at least one line to at least one second heat exchanger, and the heat is then discharged to a heat sink, for example in order to heat a flow of flue gas to a temperature required for the dentitrifiaction thereof. 1. A device for manufacturing clinker , comprising at least:a kiln for baking a raw-meal to clinker, the kiln having an outlet for flue gases;a clinker cooler for cooling clinker taken from the kiln with a cooling agent; andmeans for denitrification of flue gases generated in the kiln;wherein(i) the device has at least one first heat exchanger configured to transfer heat generated in the kiln during the combustion process to at least one heat-carrier fluid;(ii) the first heat exchanger is connected to at least one second heat exchanger via at least one conduit for the heat-carrier fluid in order to heat flue gases in the second heat exchanger with the heat previously provided to the heat-carrier fluid; and(iii) the second heat exchanger has means for conducting the heated flue gases to the means for denitrification.2. The device according to claim 1 , whereinthe clinker cooler has at least one cooling-agent tap for drawing off cooling agent heated by the clinker and conducting it to the first heat exchanger, whereby heat stored in the cooling agent is conducted to the heat-carrier fluid.3. The device according to claim 1 , whereinthe device has a further heat exchanger that is connected to the means for denitrification and to the second heat exchanger in such manner that heat of the flue gases issuing from the means for denitrification heats flue gases entering into the second heat exchanger.4. The device according to claim 1 , whereinthe first heat ...

LOWER HEAT PROCESSED CALCIUM SULPHATES FOR EARLY STRENGTH CEMENTS AND GENERAL USE

The Invention is related to increasing of early strength and final strengths of cements classified under EN and ASTM as Portland or CEM cements and also related to all clinker employing cements and to any kinds which employ calcium sulphates for set optimization and is for composing of new cements by only assessing new methods for production and is for composing of new cements by only assessing new methods to formation and inclusion of calcium sulphate resources which are used for set optimization. A new calcium sulphate resource is obtained by employing lower heats and this input is arranged to different dehydration levels at which they can be most efficient for the selected use. These different dehydration levels are called intermediate phases of dehydrate or hemihydrates or called as monohydrate. 1. As the prevailing method of inclusion of gypsum stones to the clinker at its grinding phase while it is cooling also , gypsum enters into a complex dehydration sequence where a preassumed ratio of it converts to hemihydrates and soluble anhydrites , it is cements that shall yield higher early and final strengths by inclusion of calcium sulphate resources which have a specific dehydration level and method and it consists of a new method of calcium sulphate inclusion to other cement components by inclusion of gypsum stones whom are dehydrated at planned rates by employing a specific heat level in range of 90-145° c. and inclusion at an optimum rate to clinker and other components as the sole or main calcium sulphate resource.2. As per claim 1 , it is dehydration of gypsum stones at lower heats compared to known gypsum calcinations (Dehydration) at 90° c.-120° c. and more efficiently at 105° c.-120° c. and to 135° c.-145° c. for more rapid processes and use these products which gain different characteristics than the known calcium sulphate resources as the main calcium sulphate resource in cements production.3. For obtaining the gypsums as per and claim 1 , instead of ...

METHOD FOR PRODUCING ALPHA-CALCIUM SULFATE HEMIHYDRATE BONE GRAFT

The present invention discloses a method for producing the alpha-calcium sulfate hemihydrate bone graft, which comprises the following steps: mixing calcium sulfate dihydrate and deionized water to produce calcium sulfate dihydrate paste; stirring and heating the calcium sulfate dihydrate paste at least 160° C. within 100-350 psi to produce the conversion calcium sulfate hemihydrate, filtering the conversion calcium sulfate hemihydrate with high temperature to produce the filtered calcium sulfate hemihydrate, and washing the filtered calcium sulfate hemihydrate by absolute alcohol to get the alpha-calcium sulfate hemihydrate bone graft. The present invention does not use any catalyst, possesses a high purity, high mechanical strength, and good biocompatibility, facilitates bone growth and angiogenesis, requires only 31° C., the highest temperature, during the curing process. It makes the present invention more secure in the biomedical applications. 1. A method for producing an alpha-calcium sulfate hemihydrate bone graft , comprising the following steps of:{'sub': '1', 'S: mixing calcium sulfate dihydrate and pure water to produce a calcium sulfate dihydrate paste;'}{'sub': '2', 'S: stirring and heating the calcium sulfate dihydrate paste to at least 160° C. for producing a conversion calcium sulfate hemihydrate;'}{'sub': '3', 'S: filtering the conversion calcium sulfate hemihydrate with a high temperature to produce a filtered calcium sulfate hemihydrate; and'}{'sub': '4', 'S: washing the filtered calcium sulfate hemihydrate by an absolute alcohol to generate the alpha-calcium sulfate hemihydrate bone graft.'}2. The method of claim 1 , wherein the step Sis for stirring the calcium sulfate dihydrate paste by a magnetic stir bar.3. The method of claim 1 , wherein the step Sis for heating the calcium sulfate dihydrate paste to 160° C. and then maintaining at the temperature for 10 minutes to produce the conversion calcium sulfate hemihydrate.4. The method of claim 3 , ...

CALCINED GYPSUM TREATMENT DEVICE AND CALCINED GYPSUM TREATMENT METHOD

A calcined gypsum treatment apparatus has an agitating type of cooler provided with a cooling region for cooling the calcined gypsum, and a moisture supplying device for incorporating moisture into the calcined gypsum. The moisture supplying device includes a humid gas-feeding port which introduces humid gas including moisture or steam, directly into the cooling region. The calcined gypsum is introduced through a calcined gypsum introduction port into the cooling region, and the moisture is incorporated into the calcined gypsum to modify the calcined gypsum. The humid gas-feeding port is positioned in vicinity to the calcined gypsum introduction port so as to allow the spouted or delivered flow of the humid gas to be brought into contact with the calcined gypsum immediately after introduced into the cooling region. 1. A calcined gypsum treatment apparatus , which has a moisture supplying device for incorporating moisture into calcined gypsum and an agitating type of cooler provided with a cooling region for cooling the calcined gypsum;wherein said moisture supplying device includes a humid gas-feeding port which introduces a spouted flow or delivered flow of the humid gas, including moisture or steam, directly into the cooling region;wherein said cooler is provided with a calcined gypsum introduction port for introducing the calcined gypsum into said cooling region; andwherein said humid gas-feeding port is positioned in vicinity to said calcined gypsum introduction port so as to cause said spouted or delivered flow of the humid gas to be brought into contact with said calcined gypsum immediately after being introduced into said cooling region.2. The apparatus as defined in claim 1 , wherein said humid gas is a high temperature and high humidity gas produced in a calciner for calcination of said calcined gypsum and separated from the calcined gypsum; said cooler has a calcined gypsum supply device including the calcined gypsum introduction port; a calcined gypsum ...

METHODS AND SYSTEMS FOR UTILIZING CALCIUM COMPOUND FROM CALCINED LIMESTONE

Provided herein are methods comprising a) calcining limestone in a cement plant to form carbon dioxide and calcium compound selected from calcium oxide, calcium hydroxide, or combination thereof; b) treating the calcium compound with N-containing salt in water to produce an aqueous solution comprising calcium salt and N-containing salt; and c) contacting the aqueous solution with the carbon dioxide under one or more precipitation conditions to produce a precipitation material comprising calcium carbonate and a supernatant aqueous solution wherein the calcium carbonate comprises vaterite. 1. A method comprising:a) calcining limestone in a cement plant to form carbon dioxide and calcium compound selected from calcium oxide, calcium hydroxide, or combination thereof;b) treating the calcium compound with N-containing salt in water to produce an aqueous solution comprising calcium salt and N-containing salt; andc) contacting the aqueous solution with the carbon dioxide under one or more precipitation conditions to produce a precipitation material comprising calcium carbonate and a supernatant aqueous solution wherein the calcium carbonate comprises vaterite.2. The method of claim 1 , wherein the treating step further comprises adding anhydrous ammonia or an aqueous solution of ammonia.3. The method of claim 1 , wherein the N-containing salt is N-containing inorganic salt claim 1 , N-containing organic salt claim 1 , or combination thereof.4. The method of claim 1 , wherein the N-containing salt is N-containing inorganic salt selected from the group consisting of ammonium halide claim 1 , ammonium acetate claim 1 , ammonium sulfate claim 1 , ammonium sulfite claim 1 , ammonium nitrate claim 1 , ammonium nitrite claim 1 , and combinations thereof.5. The method of claim 1 , wherein the N-containing salt is ammonium chloride.6. The method of claim 1 , wherein the N-containing salt is N-containing organic salt that has N-containing organic compound selected from the group ...

SET-ACCELERATING ADMIXTURE HAVING IMPROVED STABILITY

The present invention is mainly aimed at a set-accelerating admixture for hydraulic compositions comprising, in an aqueous solution: 1. A set-accelerating admixture for hydraulic compositions comprising , in an aqueous solution:the reaction product of an alkanolamine with a concentrated strong acid;sulfate anions; andalkaline or earth alkaline cations;having a pH comprised between 5 and 12.2. The admixture according to claim 1 , further comprising an additional set accelerating agent.3. The admixture according to claim 2 , wherein the set-accelerating agent is selected from the group consisting of sodium chloride claim 2 , calcium chloride claim 2 , sodium thiocyanate claim 2 , calcium thiocyanate claim 2 , sodium nitrate claim 2 , calcium nitrate and mixtures thereof.4. The admixture according to claim 1 , wherein the alkanolamine is selected from the group consisting of triethanolamine (TEA) claim 1 , triisopropanolamine (TIPA) claim 1 , diethanolamine (DEA) claim 1 , diethanolisopropanolamine (DEIPA) claim 1 , tetrahydroxylethylethylenediamine (THEED) and mixtures thereof.5. The admixture according to claim 1 , having a pH comprised between 5.5 and 7.6. A method for preparing a set-accelerating admixture for hydraulic compositions comprising the steps:(1) adding a concentrated strong acid to an aqueous solution of alkanolamine;(2) adding to the product obtained in step (1) an aqueous solution of an alkaline or earth alkaline chloride and/or sulfate; and(3) adjusting the pH to a value from 5 to 12, before or after step (2).7. The preparation method according to claim 6 , wherein step (1) is carried out by adding concentrated sulfuric acid and step (2) is carried out by adding a solution of an alkaline metal chloride.8. The preparation method according to claim 6 , wherein step (1) is carried out by adding concentrated hydrochloric acid and step (2) is carried out by adding a solution of an alkaline metal sulfate.9. The method according to claim 6 , wherein the ...

APPARATUS AND METHOD FOR CALCINATION OF GYPSUM

An apparatus for calcination of gypsum includes a gypsum calciner having an interior wall surface with a circular or annular configuration as seen in its plan view, and a tubular combustor positioned at a center part of a body of the calciner. Raw gypsum is calcined or dehydrated by a high temperature gas spouting flow (Hg) ejected from a lower portion of the combustor. The calciner has a stationary-vane-type or movable-vane-type auxiliary device, which circumferentially energizes the raw gypsum in the vicinity of the interior wall surface toward a circumferential direction of the calciner. The auxiliary device has a plurality of stationary vanes circumferentially arranged in an outer peripheral zone of a lower portion of the combustor and spaced apart from each other at an angular interval, or an agitator extending through a conical or inner circumferential surface defined by the interior wall surface. 1. An apparatus for calcination of gypsum , which includes a gypsum calciner having an interior wall surface with a circular or annular horizontal cross-section or profile , and a tubular combustor located at a center part of the calciner and generating a high temperature gas , wherein a spouting flow of the high temperature gas is ejected to an interior area of the calciner through a high temperature gas outlet provided at a lower part of the combustor , so that raw gypsum fed to the interior area continuously or intermittently is calcined or dehydrated by the high temperature gas , and the calcined or dehydrated gypsum is discharged out of the calciner , comprising:an auxiliary device energizing the raw gypsum in vicinity of the interior wall surface toward a circumferential direction of said calciner, or augmenting a movement of the raw gypsum in the vicinity of the interior wall surface toward the circumferential direction,wherein the auxiliary device has a plurality of stationary vanes circumferentially arranged in an outer peripheral zone of said combustor and ...

ADDITIVE-INCORPORATED BUILDING MATERIALS

Bismuth oxyhalide-added building materials are disclosed. The building material is a binder-containing building material, which sets and harden when mixed with water, such as gypsum and cement-based building material. Methods for applying bismuth oxyhalide—comprising coatings onto surfaces of building materials, to protect them against pollutants, are described. 1. Bismuth oxyhalide-added building material , wherein the bismuth oxyhalide is selected from the group consisting of BiOClBr[0.6≦y≦0.95];{'sup': '(0)', 'Bidoped-BiOCl;'}{'sup': '(0)', 'Bidoped-BiOBr; and'}{'sup': '(0)', 'sub': y', '1-y, 'Bidoped-BiOClBr[0.6≦y≦0.95].'}2. Bismuth oxyhalide-added building material according to claim 1 , wherein the building material is a binder-containing building material claim 1 , which sets and harden when mixed with water.3. Bismuth oxyhalide-added building material according to claim 2 , wherein the bismuth oxyhalide-added building material is selected from the group consisting of:bismuth oxyhalide-added gypsum; andbismuth oxyhalide-added, cement-containing building material.43. Bismuth oxyhalide-added gypsum according claim 2 , wherein the bismuth oxyhalide-added building material is bismuth oxyhalide-coated gypsum.5. Bismuth oxyhalide-coated gypsum according to claim 4 , wherein the bismuth oxyhalide-added building material has bismuth oxyhalide particles that are located in a bismuth oxyhalide-containing surface layer deposited on a gypsum-made base claim 4 , with said gypsum-made base being essentially free of bismuth oxyhalide particles.6. Bismuth oxyhalide-coated gypsum according to claim 5 , wherein the thickness of the bismuth oxyhalide-containing surface layer is from 4 to 100 μm.7. Bismuth oxyhalide-added claim 3 , cement-containing building material according to claim 3 , wherein the building material is selected from the group consisting of mortar claim 3 , plaster claim 3 , and concrete.8. Bismuth oxyhalide-added building material according to claim 1 , ...

PROCESS AND DEVICE FOR CEMENT CLINKER PRODUCTION

In a process for the production of cement clinker, in which raw meal is preheated in a preheater () using the hot exhaust gases from a clinker kiln, and the preheated raw meal, which is optionally calcined in a calciner (), is burned to clinker in the clinker kiln (), wherein the preheater () includes at least one string of a plurality of cyclone suspension-type heat exchangers (), through which the kiln exhaust gas successively flows and in which the raw meal is preheated in stages, a partial stream of the kiln exhaust gas is diverted such that only a remaining residual stream of the kiln exhaust gas is utilized for preheating the raw meal. 111-. (canceled)1216. A cement clinker production plant for carrying out a process for the production of cement clinker comprising preheating raw meal in a preheater using hot exhaust gases from a clinker kiln , and burning the preheated raw meal , which is optionally calcined in a calciner , to clinker in the clinker kiln , wherein the preheater comprises at least one string of a plurality of cyclone suspension-type heat exchangers , through which the kiln exhaust gas successively flows and in which the raw meal is preheated in stages , wherein a partial stream of the kiln exhaust gas is diverted such that only a remaining residual stream of the kiln exhaust gas is utilized for preheating the raw meal , said cement clinker production plant comprising a clinker kiln having an output-side end , a clinker cooler connected to the output side end , the clinker cooler having a feed-side end , a preheater , and optionally a calciner , connected to the clinker cooler , wherein the preheater comprises at least one string of a plurality of cyclone suspension-type heat exchangers arranged so that the remaining residual kiln exhaust gas is able to successively flow along a flow path through the at least one string of a plurality of cyclone suspension heat exchangers and in which the raw meal is preheated in stages , and a branch duct () ...

GYPSUM-CONTAINING CONSTRUCTION MATERIAL COMPOUNDS

The invention relates to gypsum-containing construction material compounds, containing gypsum, if necessary one or more polymers, if necessary one or more aggregates, and if necessary one or more additives, characterised in that the gypsum-containing construction material compounds contain one or more types of cement and one or more types of pozzolana. 1. A gypsum-containing construction material compound , comprising gypsum , optionally one or more polymers , optionally one or more aggregates , and optionally one or more admixtures , wherein the gypsum-containing construction material compound comprises one or more cements and one or more pozzolans.2. The gypsum-containing construction material compound as claimed in claim 1 , wherein the gypsum is selected from the group consisting of α- or βhemihydrate (CaSO.½ HO) claim 1 , dihydrate claim 1 , anhydrite claim 1 , and calcium sulfate obtained during flue gas desulfurization (FGD gypsum).3. The gypsum-containing construction material compound as claimed in claim 1 , wherein the pozzolans are selected from the group consisting of kaolin claim 1 , microsilica claim 1 , diatomaceous earth claim 1 , flyash claim 1 , finely ground trass claim 1 , ground blast-furnace slag claim 1 , finely ground glass claim 1 , precipitated silica claim 1 , and fumed silica.4. The gypsum-containing construction material compound as claimed in claim 1 , wherein the polymers are based on polymers of one or more ethylenically unsaturated monomers selected from the group consisting of vinyl esters claim 1 , (meth)acrylic esters claim 1 , vinylaromatics claim 1 , olefins claim 1 , 1 claim 1 ,3-dienes claim 1 , and vinyl halides claim 1 , and optionally further monomers copolymerizable therewith.5. The gypsum-containing construction material compound of claim 1 , wherein the aggregates are selected from the group consisting of lime hydrate silica sand claim 1 , finely ground quartz claim 1 , finely ground limestone claim 1 , calcium carbonate ...

Process and Apparatus for Manufacture of Portland Cement

A method of manufacture of Portland cement clinker is described in a dry process that captures the carbon dioxide emitted from the calcination of carbonate minerals, principally limestone. The process uses an indirectly heated, counter-flow reactor to pre-heat and calcine the cement meal to produce a separate calcined meal and carbon dioxide gas stream, with external heat being provided by the combustion of a secondary fuel stream with pre-heated air. This calcined meal is injected into the conventional rotary kiln, where the hot flue gas from combustion of the primary fuel with pre-heated air is used to fuse, react and sinter the powders to form granules of cement clinker. The clinker and carbon dioxide streams are cooled by the air pre-heaters.

PROCESS AND SYSTEM FOR PRODUCING COMMERCIAL QUALITY CARBON DIOXIDE FROM RECAUSTICIZING PROCESS CALCIUM CARBONATES

The invention features methods and systems for recovering carbon dioxide, for producing commercial quality carbon dioxide (CO) of 90% to +99% purity using, wet calcium carbonate lime mud produced in a recausticizing process that also produces caustic soda, for instance, Kraft paper pulp mill lime mud (a.k.a., “lime mud”) as a feedstock to a multi-stage lime mud calcination process. This process may be fueled with low, or negative cost “carbon-neutral” fuels such as waste water treatment plant (WWTP) sludge, biomass, precipitated lignins, coal, or other low cost solid fuels. High reactivity, high-quality calcined lime mud (a.k.a. re-burned lime, or calcine), required in the Kraft paper pulp mill's recausticizing process is also produced, and superheated high pressure steam and hot boiler feed-water is generated and exported to the mill's steam distribution and generation system as well as hot process water for use in the mill's manufacturing operation. The system for calcining calcium carbonate lime mud produced from a recausticizing manufacturing operation and converting it to calcined lime mud and COcomprises a calciner and a combustor linked by a moving media heat transfer (MMHT) system or apparatus. The MMHT system or apparatus thermally links separate fluid bed combustion (exothermic) and calcination (endothermic) stages with a solid particulate media. The system further comprises a flash dryer or spray dryer that utilizes exhausted enthalpy from the calcination stage. 1. A method for recovering carbon dioxide comprising:(a) providing wet lime mud sufficiently near a bubbling fluid bed calciner and a spray dryer or flash dryer such that the calciner and flash dryer or spray dryer operate in counter/current gas/solids flow wherein exiting calciner gases substantially dry the wet lime mud and the resulting dry lime mud is fed to the calciner;(b) feeding substantially dry lime mud to the fluid bed calciner wherein the fluid bed calciner is thermally linked by ...

CEMENT MODIFIER COMPOSITIONS

Described herein are emulsion polymers, spray dried powders made with said emulsion polymers, and cementitious compositions made with said emulsion polymers or said spray dried powders. Emulsion polymers described herein comprise a shell portion comprising an alkali soluble resin (ASR), a core portion formed from polymerized units of at least one hydrophobic ethylenically unsaturated monomer, wherein no crosslinker is present when the shell portion and core portion are combined, and a nonionic water-soluble polymer. 1. An emulsion polymer , comprising:a shell portion comprising an alkali soluble resin (ASR);a core portion formed from polymerized units of at least one hydrophobic ethylenically unsaturated monomer, wherein no crosslinker is present when the shell portion and core portion are combined; anda nonionic water-soluble polymer.2. The emulsion polymer of claim 1 , wherein the ASR is formed from polymerized units of at least one add-functional monomer claim 1 , anhydride-functional monomer claim 1 , salts thereof or a combination thereof.3. The emulsion polymer of claim 1 , wherein the ASR is formed from polymerized units of at least one add-functional monomer comprising Methyl methacrylate (MMA) and Methacrylic add (MAA).4. The emulsion polymer of claim 1 , wherein the ASR is formed from polymerized units of at least one add-functional monomer at a level of from about 5 percent to about 50 percent by mass of the total mass of ASR.5. The emulsion polymer of claim 1 , wherein the ASR is formed from polymerized units of at least one add-functional monomer at a level of from about 10 percent to about 30 percent by mass of the total mass of ASR.6. The emulsion polymer of claim 1 , wherein the glass transition temperature (Tg) of the ASR in the acid form is about 70° C. to about 140° C.7. The emulsion polymer of claim 1 , wherein the shell portion has a weight average molecular weight of 50 claim 1 ,000 or less.8. The emulsion polymer of claim 1 , wherein the at ...

PLASTERBOARD

A plasterboard includes a first layer of plaster and a second layer of plaster, wherein the first layer includes activated carbon; the second layer includes a scavenging agent, wherein a content of scavenging agent in the first layer, expressed as percentage by weight of dry matter, is less than a content of scavenging agent in the second layer, and wherein the second layer is free of activated carbon. 1. A plasterboard comprising a first layer of plaster and a second layer of plaster , wherein the first layer comprises activated carbon; the second layer comprises a scavenging agent , wherein a content of scavenging agent in the first layer , expressed as percentage by weight of dry matter , is less than a content of scavenging agent in the second layer and wherein the second layer is free of activated carbon.2. The plasterboard as claimed in claim 1 , wherein the first layer has a thickness of 0.1 to 4 mm.3. The plasterboard as claimed in either one of claims claim 1 , wherein the first layer has a density of 0.8 to 1.5.4. The plasterboard as claimed in claim 1 , wherein the first layer is free of scavenging agent.5. The plasterboard as claimed in claim 1 , wherein the second layer has a thickness of 6 to 25 mm.6. The plasterboard as claimed in claim 1 , wherein the second layer has a density of 0.4 to 1.5.7. The plasterboard as claimed in claim 1 , wherein the first layer has a density greater than the density of the second layer.8. The plasterboard as claimed in claim 1 , wherein the activated carbon is a powdered activated carbon.9. The plasterboard as claimed in claim 1 , wherein the activated carbon has a mean particle size of 1 to 100 μm.10. The plasterboard as claimed in claim 1 , wherein said plasterboard comprises from 0.01 to 2% by weight of activated carbon claim 1 , with respect to the dry weight of plaster.11. The plasterboard as claimed in claim 1 , wherein the scavenging agent is chosen from compounds comprising a hydrazide group claim 1 , compounds ...

GYPSUM BOARD MADE USING DRY STARCH AT AN INTERFACE BETWEEN THE GYPSUM SLURRY AND A FACING MATERIAL

The present invention is directed to an improved gypsum board and a method of making such gypsum board. For instance, the method comprises: providing a first facing material, depositing a gypsum slurry comprising at least stucco and water on the first facing material, providing a second facing material on the gypsum slurry, and allowing the stucco to convert to calcium sulfate dihydrate, wherein the method further comprises a step of providing a dry starch layer including a dry starch at an interface between the first facing material and the gypsum slurry, the second facing material and the gypsum slurry, or both. 1. A method of forming a gypsum board , the method comprising:providing a first facing material,depositing a gypsum slurry comprising stucco, starch, and water on the first facing material,providing a second facing material on the gypsum slurry, andallowing the stucco to convert to calcium sulfate dihydrate,wherein the method further comprises a step of providing a dry starch layer including a dry starch at an interface between the first facing material and the gypsum slurry, the second facing material and the gypsum slurry, or both.2. The method of claim 1 , wherein the method comprises providing a dry starch at an interface between the first facing material and the gypsum slurry.3. The method of claim 2 , wherein the dry starch is provided on a surface of the first facing material adjacent the gypsum slurry such that it covers 0.1% to 100% of the surface area of the surface of the first facing material adjacent the gypsum slurry.4. The method of claim 1 , wherein the method comprises providing a dry starch at an interface between the second facing material and the gypsum slurry.5. The method of claim 4 , wherein the dry starch is provided on a surface of the second facing material adjacent the gypsum slurry such that it covers 0.1% to 100% of the surface area of the surface of the second facing material adjacent the gypsum slurry.6. The method of claim 4 ...

Gypsum Panels, Methods, and Systems

Gypsum panels and methods of making gypsum panels are provided. A method of making a gypsum panel includes combining gypsum stucco and a halide salt sequestration agent with water to form a gypsum slurry and setting the gypsum slurry to form at least a portion of a gypsum core, wherein the halide salt sequestration agent is present in an amount effective to sequester at least a portion of halide salt present in the gypsum stucco. A gypsum panel includes a gypsum core that comprises set gypsum and a halide salt sequestration agent, wherein the halide sequestration agent sequesters at least a portion of halide salt present in the gypsum core. 1. A method of making a gypsum panel , comprising:combining gypsum stucco and a halide salt sequestration agent with water to form a gypsum slurry; andsetting the gypsum slurry to form at least a portion of a gypsum core,wherein the halide salt sequestration agent is present in an amount effective to sequester at least a portion of halide salt present in the gypsum stucco, andwherein the halide salt sequestration agent has a porous surface.2. The method of claim 1 , wherein the gypsum stucco comprises at least 600 ppm of halide salt.3. The method of claim 1 , wherein the halide salt sequestration agent comprises alumina or perlite.4. The method of claim 1 , wherein the halide salt sequestration agent comprises alumina claim 1 , and wherein the halide salt sequestration agent has a surface area of at least 200 m/g.5. The method of claim 1 , wherein the alumina comprises activated alumina.6. The method of claim 5 , wherein the halide salt sequestration agent comprises activated alumina present in an amount of from about 0.01 to about 10 weight percent claim 5 , by weight of the gypsum stucco.7. The method of claim 5 , wherein the activated alumina has an average particle size of less than 1 mm.8. The method of claim 1 , further comprising heating the halide sequestration agent prior to combining the halide sequestration agent with ...

SELF-HEALING AND DURABLE CEMENT PASTE, MORTARS, AND CONCRETES

Admixture for cementitious building materials can provide a self-healing mechanism to improve material longevity. In certain embodiments, the admixture can include the combination of both a quicklime-based replacement for fine and coarse aggregates and an SCM replacement for OPC in standard mortar and concrete. 1. A composition comprising:standard mortar including an ordinary Portland cement (OPC), a supplementary cementitious material (SCM), fine aggregate and calcined lime, wherein a portion of the OPC of an original formulation has been replaced with the supplementary cementitious material (SCM) and a portion fine aggregate of the original formulation has been replaced with the calcined lime.2. The composition of claim 1 , wherein the standard mortar includes 7-31 wt % of OPC and 69-93 wt % of fine aggregate.3. The composition of claim 2 , wherein up to 30% of OPC is replaced with SCM.4. The composition of claim 2 , wherein up to 45% of fine aggregate is replaced with calcined lime.5. The composition of claims 1 , wherein the SCM includes volcanic ash claims 1 , fly ash claims 1 , granulated blast furnace slag claims 1 , silica fume claims 1 , metakaolin claims 1 , rice husk ash claims 1 , calcined clay claims 1 , brick claims 1 , cocciopesto claims 1 , or other ceramic materials.6. A method of making an admixture for cementitious building materials comprising:making calcined lime by calcining calcium carbonate at temperatures between from 600° C. and 1450° C.;crushing, grounding or milling and sieving the calcined lime; andretaining particles between 150 microns and 4 mm for admixture.7. The method of claim 6 , further comprising replacing fine aggregate with calcined lime up to 45% in standard mortar.8. The method of claim 6 , further comprising replacing OPC with SCM up to 30% in standard mortar.9. The method of claim 7 , wherein the standard mortar includes 7-31 wt % of OPC and 69-93 wt % of fine aggregate.10. The method of claim 6 , calcining calcium ...

POZZOLANIC MIXTURE AND CEMENTING COMPOSITION

The present invention is directed to a pozzolanic mixture used as a supplementary cementitious material (SCM) comprising an activated clay, a limestone and a setting regulator. Moreover, it is also directed to a cementitious composition comprising said pozzolanic mixture, a clinker and a setting regulator. Finally, the invention is also directed to a concrete comprising the cementitious composition described above, fine aggregate, coarse aggregate and water, optionally the concrete may have other additives. 1. A pozzolanic mixture comprising:an activated clay between 20 and 85% (w/w);a limestone between 10 and 75% (w/w), anda setting regulator between 3 and 15% (w/w).2. The pozzolanic mixture of claim 1 , wherein the activated clay has a mineralogical composition comprising quartz between 20 and 76% claim 1 , and amorphous between 20 and 70%.3. The pozzolanic mixture of claim 1 , wherein the activated clay has a chemical composition with a content of AlOgreater than 10% and FeOgreater than 5%.4. The pozzolanic mixture of claim 1 , wherein the limestone is a metamorphic limestone.5. The pozzolanic mixture of claim 1 , wherein the limestone has a content of at least 60% calcium carbonate.6. The pozzolanic mixture of claim 1 , wherein the limestone has CaO between 30% and 56% claim 1 , and LOI between 20% and 45%.7. The pozzolanic mixture of claim 1 , wherein the setting regulator is selected from the group comprising calcium sulfate dihydrate (gypsum) claim 1 , calcium sulfate hemihydrate (basanite) claim 1 , calcium sulfate (anhydrite) claim 1 , and/or a combination thereof.8. The pozzolanic mixture of claim 1 , comprising:an activated clay between 30 and 70% (w/w);a limestone between 20 and 60% (w/w); anda setting regulator between 3 and 8% (w/w).9. The pozzolanic mixture of claim 1 , wherein it has a particle size of less than 75 microns.10. The pozzolanic mixture of claim 1 , wherein it has a Blaine specific surface between 5000 and 10000 cm/g.11. The pozzolanic ...

LIQUID DISPERSANT COMPOSITION FOR GYPSUM

The present invention relates to a liquid dispersant composition for gypsum, containing (A) a particular polycarboxylic acid copolymer, a particular nitrogen-containing compound, such as a particular alkylamine, and water, and having pH of 7.0 or more and 13.0 or less at 20° C. 2. The gypsum slurry according to claim 1 , wherein a content of the component (B) is 0.0003 parts by mass or more and 0.2 parts by mass or less per 100 parts by mass of the gypsum.3. The gypsum slurry according to claim 1 , wherein the gypsum is gypsum that contains phosphoric acid.4. The gypsum slurry according to claim 1 , wherein the mass ratio of the component (A) and the component (B) claim 1 , (A)/(B) claim 1 , is 0.2 or more and 3 claim 1 ,000 or less.5. The gypsum slurry according to claim 1 , wherein the mass ratio of the component (A) and the component (B) claim 1 , (A)/(B) claim 1 , is 2 or more and 15 or less.7. The method for producing a gypsum slurry according to claim 6 , wherein the component (A) is mixed in an amount of 0.005 parts by mass or more and 1.0 part by mass or less per 100 parts by mass of the gypsum.8. The method for producing a gypsum slurry according to claim 6 , wherein the component (B) is mixed in an amount of 0.0003 parts by mass or more and 0.2 parts by mass or less per 100 parts by mass of the gypsum.9. The method for producing a gypsum slurry according to claim 6 , wherein the component (A) and the component (B) are mixed in a mass ratio claim 6 , (A)/(B) claim 6 , of 0.2 or more and 3 claim 6 ,000 or less.10. The method for producing a gypsum slurry according to claim 6 , wherein the component (A) and the component (B) are mixed in a mass ratio claim 6 , (A)/(B) claim 6 , of 2 or more and 15 or less.12. The production method according to claim 11 , wherein the liquid dispersant composition for gypsum is for gypsum that contains phosphoric acid.13. The production method according to claim 11 , wherein the component (A) is mixed in an amount of 5% by mass ...

LIGHT WEIGHT GYPSUM BOARD

The invention generally provides gypsum-containing slurries including stucco, naphthalenesulfonate dispersant, and pregelatinized starch. The naphthalenesulfonate dispersant is present in an amount of about 0.1%-3.0% by weight based on the weight of dry stucco. The pregelatinized starch is present in an amount of at least about 0.5% by weight up to about 10% by weight of pregelatinized starch by weight based on the weight of dry stucco in the formulation. Other slurry additives can include trimetaphosphate salts, accelerators, binders, paper fiber, glass fiber, and other known ingredients. The invention also comprises the gypsum-containing products made with such slurries, for example, gypsum wallboard, and a method of making gypsum wallboard. 119-. (canceled)20. A light weight gypsum board comprising:a set gypsum composition disposed between two cover sheets, the set gypsum composition formed from at least water, stucco, starch, dispersant, and polyphosphate;the stucco is in an amount of at least about 700 lb/MSF;the starch is in an amount from about 0.5% to about 10% by weight based on the weight of the stucco and is effective to increase the core hardness of the gypsum composition relative to the gypsum composition without the starch;the dispersant is in an amount from about 0.1% to about 3.0% by weight based on the weight of the stucco;the polyphosphate is in an amount from about 0.12% to about 0.4% by weight based on the weight of the stucco;{'sup': '3', 'the board has a density of about 34 lb/ftor less; and'}the board has a core hardness of at least about 11 lb, the core hardness determined according to ASTM standard C473.2130-. (canceled) This is a continuation patent application of copending U.S. patent application Ser. No. 12/795,125 (filed Jun. 7, 2010) and Ser. No. 12/709,159 (filed Feb. 19, 2010), a continuation application and a divisional application, respectively, of U.S. patent application Ser. No. 11/449,177 (filed on Jun. 7, 2006), now issued as U. ...

MICROWAVE HEATING FOR GYPSUM MANUFACTURING PROCESSES

Methods of making calcium sulfate whiskers are provided. In one aspect, a method includes autoclaving a slurry of calcium sulfate hemihydrate and water to form calcium sulfate hemihydrate whiskers in water and microwaving the whiskers to dewater them, wherein the microwaving is effective to prevent a majority of the whiskers from reverting to a dihydrate form. In one aspect, a method includes microwaving calcium sulfate hemihydrate whiskers to form anhydrite calcium sulfate whiskers, wherein the microwaving is effective to remove a substantial amount of chemically bound water from the whiskers. 1. A method of making calcium sulfate whiskers , comprising:autoclaving a slurry of calcium sulfate hemihydrate and water to form calcium sulfate hemihydrate whiskers in water; andmicrowaving the calcium sulfate hemihydrate whiskers to dewater the calcium sulfate hemihydrate whiskers,wherein the microwaving is effective to prevent a majority of the calcium sulfate hemihydrate whiskers from reverting to a dihydrate form.2. The method of claim 1 , wherein the microwaving is effective to remove a substantial amount of physically free water from the calcium sulfate hemihydrate whiskers.3. The method of claim 1 , wherein the microwaving effective to reduce a moisture content of the calcium sulfate hemihydrate whiskers to 20% or less claim 1 , by weight.4. The method of claim 1 , wherein the microwaving is effective to reduce a moisture content of the calcium sulfate hemihydrate whiskers by at least 40% claim 1 , by weight.5. The method of claim 1 , wherein the microwaving is performed at a power level of at least 1000 watts.6. The method of claim 1 , wherein the microwaving maintains the calcium sulfate hemihydrate whiskers at a temperature of 100° C. or above claim 1 , such that the calcium sulfate hemihydrate whiskers cannot revert into a dihydrate form.7. The method of claim 1 , wherein the calcium sulfate hemihydrate comprises alpha calcium sulfate hemihydrate or beta calcium ...

FIRE RESISTANT GYPSUM BOARD COMPRISING EXPANDABLE GRAPHITE AND RELATED METHODS AND SLURRIES

Disclosed are a gypsum board, and related slurries and methods. The gypsum board comprises a gypsum layer disposed between two cover sheets. The gypsum layer comprises a crystalline matrix of set gypsum and expandable graphite. The expandable graphite exhibits volume expansion at high temperatures. Optionally, unexpanded vermiculite can also be included in the gypsum layer to provide an expansion component at even higher temperatures. Because of synergy between the expandable graphite and unexpanded vermiculite in accordance with some embodiments, less vermiculite can be included in the board than in conventional board that contained vermiculite. The board desirably can pass one or more fire-related tests, and is a fire-rated board in some embodiments. 1. A gypsum board comprising a gypsum layer disposed between two cover sheets , the gypsum layer comprising a crystalline matrix of set gypsum and expandable graphite wherein the gypsum board has a High Temperature Shrinkage (S) of about 10% or less in the z direction when heated to about 1560° F. (850° C.) , according to ASTM C1795-15.2. The gypsum board of claim 1 , wherein the gypsum layer is further formed from an unexpanded vermiculite.3. The gypsum board of claim 2 , wherein the unexpanded vermiculite is present in an amount of from about 0% to about 20% by weight of the stucco.4. The gypsum board of claim 2 , wherein the weight ratio of expandable graphite to unexpanded vermiculite is from about 10:90 to about 70:30.5. The gypsum board of claim 1 , wherein the expandable graphite is present in an amount of from about 0.1% to about 10% by weight of the stucco.6. The gypsum board of claim 1 , wherein the expandable graphite has an expansion onset temperature of from about 250° F. (120° C.) to about 750° F. (400° C.).7. The gypsum board of claim 1 , wherein the expandable graphite has a particle size of from about 5 mesh to about 400 mesh.8. The gypsum board of claim 1 , wherein the expandable graphite has a ...

Method For Reducing Elemental Sulfur In Gypsum Products

Disclosed are various methods for reducing levels of elemental sulfur within gypsum products such as wall board. Gypsum sometimes includes increased levels of elemental sulfur. Such sulfur can be corrosive and otherwise harmful at elevated levels. The disclosure contemplates reacting the elemental sulfur with copper to copper sulfide. This reaction has the benefit of reducing the levels of elemental sulfur present within the final gypsum product. The copper can be added at any of a variety of locations in the manufacturing process. This is a very efficient method for reducing elemental sulfur in the production of gypsum products.

STEAM-ASSISTED PRODUCTION OF METAL SILICATE CEMENTS, COMPOSITIONS AND METHODS THEREOF

The invention provides a novel, steam-assisted production methodology and associated compositions and methods of use in the manufacture of carbonatable or non-carbonatable metal silicate or metal silicate hydrate (e.g., calcium silicate or calcium silicate hydrate) compositions. These metal silicate compositions and related phases are suitable for use hydraulic, partially hydraulic or non-hydraulic cement that sets and hardens by a hydration process, a carbonation process or a combination thereof, and may be applied in a variety of concrete components in the infrastructure, construction, pavement and landscaping industries. 1. A method for producing metal silicate , or metal silicate hydrate product capable of carbonation or hydration to form a cementitious product , comprising:(a) providing a ground mixture comprising source materials of metal oxide and silica;(b) providing a gas comprising a steam of water over the ground mixture of source materials at a pressure, wherein the steam of water has a partial pressure that ranges from atmospheric pressure to supercritical water pressure; and(c) subjecting the ground mixture of source materials (i) to a temperature and for a time sufficient to calcine the ground mixture, and (ii) to a temperature and for a time sufficient to fuse the calcined ground mixture to form the cementitious product.2. The method of claim 1 , wherein the temperature sufficient to heat the ground mixture is lower than about 1 claim 1 ,200° C.3. The method of claim 2 , wherein the temperature sufficient to heat the ground mixture is lower than about 800° C.4. The method of claim 1 , wherein the temperature sufficient to fuse the ground mixture is lower than about 1 claim 1 ,200° C.5. The method of claim 4 , wherein the temperature sufficient to fuse the ground mixture is lower than about 800° C.6. The method of claim 1 , wherein the steam of water is substantially in supercritical condition.7. The method of claim 1 , further comprising cooling the ...

A NEW METHOD FOR PRODUCING CALCIUM SULPHATE HEMIHYDRATE WITH UNIQUE PROPERTIES

The present invention relates to a new method for producing a calcium sulphate hemihydrate with unique properties for use for therapeutic applications in the cosmetic or pharmaceutical industry. Calcium sulphate hemihydrate is a biocompatible and biodegradable inorganic substance and thus suitable as a carrier in pharmaceutical compositions, e.g. a controlled release composition, containing at least one pharmaceutically active ingredient. 1. A method for producing calcium sulphate hemihydrate powder comprising the steps ofa. treating calcium sulphate dihydrate in a closed cabinet with controlled temperature, air circulation in the cabinet and an adjustable air outflow from the cabinet;b. adjusting the temperature to from above 100 to 220° C.;c. allowing for a process time of 1-12 hours; andd. adjusting the moist air outflow from the cabinet to 0.2-1.5 L/s.2. The method according to claim 1 , wherein the temperature in step b is 150-220° C.3. The method according to claim 1 , wherein the temperature in step b is 180-210° C.4. The method according to claim 1 , wherein the temperature in step b is 185-205° C.5. The method according to claim 1 , wherein the temperature in step b is 190-203° C.6. The method according to claim 1 , wherein the temperature in step b is 200° C.7. The method according to claim 1 , wherein the time in step c is 2-8 hours.8. The method according to claim 1 , wherein the time in step c is 3-5 hours.9. The method according to claim 1 , wherein the time in step c is 3.5-4.5 hours.1011-. (canceled)12. The method according to claim 1 , wherein the outlet in step d is 0.25-1 L/s.13. The method according to claim 1 , wherein the outlet in step d is 0.25-0.8 L/s.14. The method according to claim 1 , wherein the outlet in step d is 0.3-0.7 L/s.15. The method according to claim 1 , wherein the outlet in step d is 0.4-0.6 L/s.1617-. (canceled) The present invention relates to a new method for producing a calcium sulphate hemihydrate for use in the ...

HYDRAULIC BINDER COMPOSITION USING RAPIDLY-COOLED STEELMAKING REDUCED SLAG POWDER, AND METHOD OF PREPARING THE SAME

Disclosed are a hydraulic binder composition using rapidly-cooled steelmaking reduced slag powder and a method of preparing the same. More particularly, the rapidly-cooled steelmaking reduced slag (RC-LFS) powder is obtained by spraying and scattering gas at a high pressure and high speed onto electric furnace smelting reduction slag, which is one of the by-products generated during iron smelting performed in an ironworks, and quickly cooling and pulverizing the slag. The initial high hydration heat reaction and initial setting of the rapidly-cooled steelmaking reduced slag (RC-LFS) powder are delayed to ensure workability. A retardant and gypsum are mixed into the rapidly-cooled steelmaking reduced slag (RC-LFS) powder so as to activate the generation of needle-shaped ettringite and to thus develop the initial and long-term strength, and therefore the rapidly-cooled steelmaking reduced slag (RC-LFS) powder of the present invention can be used as a substitute for ordinary Portland cement. 1. A hydraulic binder composition using rapidly-cooled steelmaking reduced slag powder comprising the rapidly-cooled steelmaking reduced slag powder (RC-LFS powder) obtained by spraying and scattering gas at high pressure and high speed onto electric furnace smelting reduction slag , which is one of by-products generated during iron smelting performed in an ironworks , and quickly cooling and pulverizing the slag; a retardant to delay coagulation occurring when the rapidly-cooled steelmaking reduced slag powder reacts with water; and gypsum used to delay coagulation occurring when the rapidly-cooled steelmaking reduced slag powder reacts with water , improve delay and initial and long-term strength , and reduce shrinkage.2. The hydraulic binder composition according to claim 1 , wherein the rapidly-cooled steelmaking reduced slag powder is pulverized by rapidly-cooling the smelting reduction slag at 1 claim 1 ,300 to 1 claim 1 ,400° C. to 400 to 600° C. through spraying and ...

GYPSUM MANUFACTURING PROCESS IMPROVEMENT

The present application provides a method for analyzing a raw material for manufacturing of gypsum products, analyzing a plurality of gypsum products, and the gypsum products produced therefrom. Desirably, the analyzing of the raw material is conducted using prompt gamma neutron activation analysis. 119.-. (canceled)20. A plurality of analyzed gypsum products having improved consistency and quality as characterized by a reduced weight variability , an improved content uniformity , or a combination thereof.21. The plurality of gypsum products of claim 20 , wherein the reduced weight variability comprises a weight variability of less than about 150 lbs per 1000 ft.22. The plurality of gypsum products of claim 20 , wherein the reduced weight variability comprises a weight variability of less than about 100 lbs per 1000 ft.23. The plurality of gypsum products of claim 20 , wherein the reduced weight variability comprises a weight variability of less than about 50 lbs per 1000 ft.24. The plurality of gypsum products of claim 20 , wherein the reduced weight variability comprises a weight variability of less than about 10 lbs per 1000 ft.25. The plurality of gypsum products of claim 20 , wherein the improved content uniformity is characterized by a calcium sulfate dihydrate concentration variability of less than about ±10%.26. The plurality of gypsum products of claim 20 , wherein the improved content uniformity is characterized by a calcium sulfate dihydrate concentration variability of less than about ±5%.27. The plurality of gypsum products of claim 20 , wherein the improved content uniformity is characterized by a calcium sulfate dihydrate concentration variability of less than about ±2%.28. The plurality of gypsum products of claim 20 , wherein the improved content uniformity is characterized by a calcium sulfate dihydrate concentration variability of less than about ±1%.2933.-. (canceled)34. The plurality of gypsum products of claim 20 , wherein the gypsum products ...

Ceramic Matrix Compositions and Uses Thereof

The present specification discloses ceramic matrix compositions, methods of making such ceramic matrix compositions and methods and uses for such ceramic matrix compositions. 1. A ceramic matrix composition comprising:about 75% to about 99% of a hydraulic gypsum cement material, based on a total dry weight of the composition;about 0.1% to about 5% of a non-hydraulic gypsum cement material, based on the total dry weight of the composition;about 0.1% to about 10% of a crosslinked synthetic hydrogel, based on the total dry weight of the composition; andabout 0.1% to about 10% of a binder, based on the total dry weight of the composition;wherein the ceramic matrix composition comprises a three-dimensional interconnected array of channels.2. The ceramic matrix composition according to claim 1 , wherein the hydraulic gypsum cement material comprises calcium sulfate hemihydrate claim 1 , a silicon dioxide and a cement.3. The ceramic matrix composition according to claim 2 , wherein the calcium sulfate hemihydrate is present in an amount of at least 85% claim 2 , at least 90% or at least 95% claim 2 , based on a total dry weight of the hydraulic gypsum cement material.4. The ceramic matrix composition according to claim 2 , wherein the silicon dioxide is present in an amount of about 0.1% to about 10% claim 2 , about 0.5% to about 7.5% or about 1% to about 5% claim 2 , based on a total dry weight of the hydraulic gypsum cement material.5. The ceramic matrix composition according to claim 2 , wherein the cement is present in an amount of about 0.1% to about 10% claim 2 , about 0.5% to about 7.5% or about 1% to about 5% claim 2 , based on a total dry weight of the hydraulic gypsum cement material.6. The ceramic matrix composition according to claim 1 , wherein the non-hydraulic gypsum cement material comprises calcium sulfate hemihydrate claim 1 , talc and a low-molecular-weight carbohydrate.7. The ceramic matrix composition according to claim 6 , wherein the calcium sulfate ...

FIRE RESISTANT CALCIUM SULPHATE-BASED PRODUCTS

The present invention provides a calcium sulphate-based product (e.g. a wall board) comprising gypsum, a pozzolan source such as a clay additive, rice husk ash or diatomaceous earth and a metal salt additive. The product may be produced by drying an aqueous slurry comprising calcined gypsum, the pozzolan source and the metal salt additive. The clay additive may be a kaolinitic clay. The metal salt additive may be a magnesium salt e.g. magnesium nitrate, magnesium chloride or magnesium hydroxide. 1. A gypsum wallboard comprising:40 wt % or greater gypsum,a pozzolan source, anda metal salt additive, wherein:the metal salt additive is provided in an amount between 5 and 25 wt % based on the weight of the gypsum, pozzolan source and metal salt additive, andthe metal salt additive is a salt of magnesium, copper, zinc or aluminium.2. The wallboard according to claim 1 , whereinthe pozzolan source is a kaolinitic clay additive, andThe pozzolan source is included in an amount between 5 and 30 wt % based on the weight of the gypsum, clay additive and metal salt additive.3. The wallboard according to claim 2 , wherein the clay additive is included in an amount between 10 and 25 wt %.4. The wallboard according to claim 1 , whereinthe pozzolan source is rice husk ash or diatomaceous earth, andthe pozzolan source is included in an amount equal to or greater than 20 wt %.5. The wallboard according to claim 1 , wherein the metal salt is a nitrate claim 1 , carbonate claim 1 , hydrogen carbonate claim 1 , sulphate claim 1 , hydroxide or chloride.6. A gypsum wallboard comprising:40 wt % or greater of gypsum,a pozzolan source, anda metal salt, wherein:the metal salt additive is provided in an amount of 5-25 wt % based on the amount of calcined gypsum, pozzolan and metal salt additive, andthe metal salt additive is a metal hydroxide, a metal hydrogen carbonate, or a chloride of magnesium, copper, zinc or aluminium.7. The wallboard according to claim 6 , whereinthe pozzolan source is a ...

COMPOSITE GYPSUM BOARD FORMED FROM HIGH-SALT STUCCO AND RELATED METHODS

Disclosed are a composite gypsum board and a method of preparing gypsum board. The board contains at least one set gypsum layer sandwiched between face and back cover sheets. The set gypsum layer is formed from at least stucco and water. The stucco material generally includes a high salt impurity content, for example, when the stucco is calcined from certain sources of low-quality synthetic gypsum. For example, in some embodiments, the salts are chloride salts, e.g., sodium chloride (NaCl), potassium chloride (KCl), magnesium chloride (MgCl), and/or calcium chloride (CaCl). The board and methods improve the bond between the gypsum layer(s) and at least one of the cover sheets (e.g., the back cover sheet). Also provided are methods and systems relating to drying gypsum board. 1. A gypsum board comprising a set gypsum core disposed between a face cover sheet and a back cover sheet , the set gypsum core formed from a slurry comprising water , stucco , and a high salt impurity content , the board comprising at least two of the following:(a) perforations in the back cover sheet;(b) the back cover sheet containing high absorption paper;(c) starch included between the set gypsum core and at least one of the cover sheets; and(d) (i) a back skim coat layer defining first and second skim coat faces, the back skim coat layer formed from a second slurry comprising water, stucco, and a skim coat starch, the first face of the back skim coat facing the back cover sheet and the second face of the back skim coat facing the first core face, and (ii) a face skim coat layer defining first and second faces, the face skim coat layer formed from a third slurry comprising water, stucco, and optionally, the skim coat starch, the first face of the face skim coat layer facing a second face of the board core, and the second face of the face skim coat layer facing the face cover sheet, wherein the skim coat starch enhances the bond between the core and at least the back cover sheet, wherein the ...

PLASTER PATCHING COMPOSITIONS AND METHODS FOR MAKING AND USING SAME

Provided are plaster patching compositions including lime, sand, perlite and gypsum. Also provided are methods of making and using the compositions to reproduce, preserve, and/or repair plaster, for example, historic plaster. 1. A plaster patching composition , comprising:lime in an amount of from about 20 to about 40 wt %;sand in an amount of from about 30 to about 50 wt %;perlite in an amount of from about 4 to about 10 wt %; andgypsum in an amount of from about 12 to about 32 wt %.2. The plaster patching of claim 1 , wherein calcium magnesium hydroxide in an amount of from about 5 to about 16 wt %, and', 'calcium magnesium hydroxide oxide in an amount of from about 5 to about 16 wt %;, 'the lime comprises'}the sand comprises crystalline silica and is present in an amount of from about 34 wt % to about 48 wt %;the perlite is present in an amount of from about 2 wt % to about 12 wt %; andthe gypsum comprises calcium sulfate hemihydrates and is present in an amount of from about 12 wt % to about 32 wt %.3. A plaster patching composition claim 1 , comprising: calcium magnesium hydroxide in an amount of from about 5 to about 16 wt %,', 'calcium magnesium hydroxide oxide in an amount of from about 5 to about 16 wt %,', 'optionally calcium hydroxide in an amount of from about 3 to about 8 wt %,', 'optionally magnesium hydroxide in an amount of from about >0 to about 6 wt %, and', 'optionally crystalline silica in an amount of <0.1 wt %;, 'lime comprising'}crystalline silica in an amount of from about 34 wt % to about 48 wt %;perlite in an amount of from about 2 wt % to about 12 wt %; andcalcium sulfate hemihydrates in an amount of from about 12 wt % to about 32 wt %.4. A dry pre-mix plaster patching composition claim 1 , consisting of: calcium magnesium hydroxide in an amount of from about 5 to about 16 wt %,', 'calcium magnesium hydroxide oxide in an amount of from about 5 to about 16 wt %,', 'optionally calcium hydroxide in an amount of from about 3 to about 8 wt %,', ...

USE OF SACRIFICIAL AGENTS IN MANUFACTURE OF GYPSUM WALLBOARD

The present invention relates to the use of sacrificial agents to counteract the deleterious impact of gypsum contaminants on the effectiveness of certain stucco additives, particularly, water reducing agents and foaming agents, in a stucco slurry used to make gypsum wallboard. 1. A method for preparing a stucco slurry suitable for manufacturing gypsum wallboard comprising combining water with stucco , a sacrificial agent , a dispersant and a foaming agent to yield the stucco slurry2. The method of claim 1 , wherein the sacrificial agent constitutes a hydrotrope.3. The method of claim 1 , wherein the sacrificial agent is selected from an alcohol ethoxylate claim 1 , an amine claim 1 , or a combination thereof.4. The method of claim 3 , wherein the alcohol ethoxylate comprises poly(oxy-1 claim 3 ,2-ethanediyl) claim 3 , α-(2-ethylhexyl)-ω-hydroxy.5. The method of claim 3 , wherein the amine comprises a compound having the chemical structure NR1R2R3 claim 3 , wherein{'sub': 5-22', '5-22', '5-22', '2-22', '2-22', '2-22, 'R1 is selected from substituted or unsubstituted non-alkoxylated Calkyls, substituted or unsubstituted non-alkoxylated Calkenyls, substituted or unsubstituted non-alkoxylated Calkynyls, substituted or unsubstituted Calkoxylated alkyls, substituted or unsubstituted Calkoxylated alkenyls, and substituted or unsubstituted Calkoxylated alkynyls,'}{'sub': 1-22', '2-22', '2-22, 'R2 and R3 are non-alkoxylated and are independently selected from hydrogen, substituted or unsubstituted Calkyls, substituted or unsubstituted Calkenyls, and substituted or unsubstituted Calkynyls'}6. The method of wherein the amine compound is selected from the group consisting of tridodecylamine claim 5 , dodecyldimethylamine claim 5 , octadecyldimethylamine claim 5 , cocoalkyldimethylamine claim 5 , hydrogenated tallowalkyldimethylamines claim 5 , oleyldimethylamine claim 5 , dicocoalkylmethylamine claim 5 , N-oleyl-1 claim 5 ,1′-iminobis-2-propanol claim 5 , N-tallowalkyl-1 claim ...

TWO-STAGE CALCINATION METHOD, AND PLANT FOR SAME

A method for the calcination of powdery or fine-particled plaster, comprising two steps: the plaster is subjected to a flash-calcination in a calcinator and the hot plaster is post-calcinated in a reaction vessel. Post-calcination is carried out in the reaction vessel by adding humid gas, said reaction vessel not being heated. The postcalcination takes place over a long period of time, that is at least 10 times, preferably 50-100 times longer than the amount of time taken for flash calcination. Calcination takes place without expending additional energy, and the remaining dihydrate produced during the flash calcination is also transformed into semi-hydrate and undesired anhydrite fractions are reduced. The method can ensure consistency in the product quality and also increase product quality. The temperature in the upstream calcinator can be lowered thus saving more energy. The method can also be used to accelerate the ageing of calcinated plaster. 1. A method for calcining gypsum , comprising:calcining the gypsum in a first stage with flash calcination,guiding the gypsum from the first stage to a second stage via a transfer line, andcalcining the gypsum to completion in a reaction vessel in a second stage using indirect heating, wherein, in the second stage, water vapor is recirculated without external vapor or water being supplied.2. The method of claim 1 , comprising setting an excessively high content of water of crystallization in the transfer line that is greater than a target content of water of crystallization of the second stage.3. The method of claim 1 , wherein recirculation of water vapor comprises variable recirculation with differing degrees of recirculation.4. The method of claim 1 , wherein recirculated water vapor is returned via a fluidization device into the reaction vessel for the second stage.5. The method of claim 1 , wherein the second stage comprises a regulable blower for recirculation of the water vapor.6. The method of claim 1 , wherein ...

PLASTERBOARD

A plasterboard includes a first layer of plaster and a second layer of plaster, wherein the first layer includes activated carbon; the second layer includes a scavenging agent, wherein a content of scavenging agent in the first layer, expressed as percentage by weight of dry matter, is less than a content of scavenging agent in the second layer, and wherein the second layer is free of activated carbon. 115-. (canceled)16. A plasterboard comprising:a first layer of plaster and a second layer of plaster that is in contact with the first layer of plaster,wherein the first layer of plaster comprises activated carbon, and the second layer of plaster comprises a scavenging agent,wherein the second layer of plaster is free of activated carbon,wherein the first layer of plaster is a roller coating layer that has a density greater by at least 5% than a density of the second layer of plaster,wherein a thickness of the second layer of plaster is greater than a thickness of the first layer of plaster, the thickness of the second layer of plaster being at least equal to half a total thickness of the plasterboard.17. The plasterboard of claim 16 , wherein the density of the first layer of plaster is greater by at most 40% than the density of the second layer of plaster.18. The plasterboard of claim 16 , wherein the density of the first layer of plaster is from 0.8 to 1.5.19. The plasterboard of claim 16 , wherein the density of the second layer of plaster is from 0.4 to 1.5.20. The plasterboard of claim 16 , wherein the thickness of the first layer of plaster is from 0.1 mm to less than 4 mm.21. The plasterboard of claim 20 , wherein the thickness of the first layer of plaster is from 0.1 mm to less than 2 mm.22. The plasterboard of claim 16 , wherein the total thickness of the plasterboard is from 6 mm to 25 mm.23. The plasterboard of claim 22 , wherein the total thickness of the plasterboard is from 10 mm to 1.5 mm.24. The plasterboard of claim 16 , wherein a content of the ...

LIGHT-WEIGHT GYPSUM BOARD WITH IMPROVED STRENGTH AND METHOD FOR MAKING SAME

Method for making light-weight gypsum board with enhanced compressive strength by addition of dispersants. Wallboards made by use of a gypsum-based composition comprising a ketone resin as dispersant and a foaming agent. 114.-. (canceled)15. A slurry comprising gypsum , a surfactant foam and a ketone resin , wherein the ketone resin is a condensation product of at least(I) a ketone.(II) a formaldehyde, and(III) a compound with at least one group selected from the group consisting of phosphono, sulfite, sulphino, sulpho, sulphamido, sulphoxy, sulphoalkyloxy, sulphinoalkyloxy, phosphonooxy groups and salts of each thereof.16. The slurry of claim 15 , wherein the mole ratio I/II/III is 1/2 to 3/0.33 to 1.17. The slurry of claim 15 , wherein the ketone resin is the condensation product of cyclohexanone claim 15 , formaldehyde claim 15 , and sulfite.18. The slurry of claim 15 , wherein the ketone resin is present from 0.01 to 1 weight-% claim 15 , based on the weight of gypsum in the slurry.19. The slurry of claim 18 , wherein the ketone resin is provided as 15 to 60 weight % solids of an aqueous solution.20. The slurry of claim 15 , wherein the surfactant foam is prepared from an aqueous surfactant solution comprising a linear or branched fatty alkyl sulfate claim 15 , linear or branched fatty alkyl ether sulfate claim 15 , hydrotrope or a mixture thereof.21. The slurry of claim 15 , wherein the gypsum further comprises clay.22. The slurry of claim 21 , wherein the clay is a swellable clay.23. A wallboard comprising a set gypsum core that is produced from the slurry according to .24. The wallboard of with a dry weight density of 0.45-1.0 kg/m.25. The wallboard of with a dry weight density of 0.50-0.80 kg/m.26. The wallboard of claim 24 , wherein the set gypsum core comprises a ketone resin.27. The wallboard of claim 26 , wherein the ketone resin is present in the set gypsum core in a range of 0.01 to 0.5 weight-% of the solid condensation product claim 26 , based on the ...

METHOD AND APPARATUS FOR CREASING FACING MATERIAL USED IN THE MANUFACTURE OF WALLBOARD

Aspects of this disclosure relate to a method of manufacturing wallboard which includes providing a first layer of facing material, creasing the first layer facing material intermittently to create a series of creased portions, providing a gypsum slurry on the first layer of facing material and providing a second layer of facing material over the gypsum slurry. Further, creasing the first layer of facing material intermittently can include intermittently creasing the first layer of facing material in a substantially linear fashion extending in a first direction of the first layer of facing material so that the first layer of facing material exhibits a linear series of creased portions extending in the first direction of the first layer of facing material and a series of portions that are not creased extending in the first direction of the first layer of facing material. 1. An apparatus for manufacturing wallboard comprising:a feeder that advances a first layer of facing material along a wallboard production line;a first set of one or more creaser wheels positioned along the line adjacent a first edge of the first layer of facing material;a second set of one or more creaser wheels positioned along the line adjacent a second edge of the first layer of facing material; anda feeding source along the line that feeds a gypsum slurry onto the first layer of facing material,wherein each of the creaser wheels includes a series of notches and teeth and each creaser wheel creases the first layer of facing material by creasing portions the first layer of facing material and refraining from creasing other portions of first layer facing material as it rotates so that the uncreased portions of the first layer of facing material are positioned in line with the creased portions of the facing material and between the creased portions of facing material.2. The apparatus for manufacturing wallboard according to claim 1 , further comprising:a second feeder for feeding a second layer of ...

Method for preparing a-calcium sulfate hemihydrate with calcium sulfate dihydrate

A method for preparing α-calcium sulfate hemihydrate with calcium sulfate dihydrate includes steps of: uniformly mixing the calcium sulfate dihydrate with an additive solution, and obtaining a mixture, wherein weight percentages of the calcium sulfate dihydrate and the additive solution in the mixture are respectively 90.00-95.00% and 5.00-10.00%, and the additive solution contains water, inorganic salt, organic salt, organic acid, surfactant, and seed crystal; rising a temperature of the mixture to 130-150° C., keeping for 20-120 minutes, and the calcium sulfate dihydrate in the mixture transforming to the α-calcium sulfate hemihydrate; drying the mixture after reaction at 105-160° C., and thereafter obtaining α-calcium sulfate hemihydrate product. The used calcium sulfate dihydrate can be natural raw materials and industrial by-products. The industrial by-products can be directly applied. Through utilizing characteristics of the industrial by-products, a dehydration reaction time and a drying time are shortened, and a product quality is obviously increased. 1. A method for preparing α-calcium sulfate hemihydrate with calcium sulfate dihydrate , comprising steps of: (1) uniformly mixing the calcium sulfate dihydrate with an additive solution , and obtaining a first mixture , wherein weight percentages of the calcium sulfate dihydrate and the additive solution in the first mixture are respectively 90.00-95.00% and 5.00-10.00%; (2) rising a temperature of the first mixture to 120-160° C. , keeping the temperature for 15-130 minutes , and obtaining a second mixture; and (3) drying the second mixture at 100-170° C. , and thereafter obtaining α-calcium sulfate hemihydrate product.2. The method for preparing the α-calcium sulfate hemihydrate with the calcium sulfate dihydrate claim 1 , as recited in claim 1 , wherein the additive solution contains water claim 1 , inorganic salt claim 1 , organic salt claim 1 , organic acid claim 1 , surfactant claim 1 , and seed crystal. ...

METHOD OF PRODUCING GYPSUM BINDER

A method of producing a gypsum binder, the method including dehydrating of gypsum raw material lumps by heating in a gaseous medium with further drying, cooling, and milling stages, wherein the heating gypsum raw material lumps is performed either by: (i) placing the lumps in a heating medium set to a temperature exceeding the temperature under which dehydration and formation of gypsum α-hemihydrate occurs; and/or (ii) placing the lumps in a heating medium having a high rate of temperature increase such that a temperature higher than the temperature under which dehydration and formation of gypsum α-hemihydrate occurs is reached; wherein a heating time is selected sufficient for completion of the process of gypsum α-modification formation within the gypsum lumps, and wherein the heating is performed under atmospheric pressure through lump surface. 1. A method of producing a gypsum binder , the method comprising:dehydrating of gypsum raw material lumps by heating in a gaseous medium with further drying, cooling, and milling stages,wherein the heating gypsum raw material lumps is performed either by:(i) placing the lumps in a heating medium set to a temperature exceeding the temperature under which dehydration and formation of gypsum α-hemihydrate occurs; or(ii) placing the lumps in a heating medium having a high rate of temperature increase such that a temperature higher than the temperature under which dehydration and formation of gypsum α-hemihydrate occurs is reached;wherein a heating time is selected sufficient for completion of gypsum α-modification formation within the gypsum lumps, andwherein the heating is performed under atmospheric pressure through lump surface.2. The method of claim 1 , wherein natural gypsum stone and/or synthetic gypsum claim 1 , and/or recycled gypsum are used as gypsum raw materials.3. The method of claim 2 , wherein the lumps of gypsum raw material are formed by crushing and/or agglomerating.4. The method of claim 1 , wherein the ...

SYSTEM FOR THE PRODUCTION OF FINE LIME

The present invention is directed to a method of continuously calcining a limestone particle mix comprising a fine fraction of limestone particles and a coarser fraction of limestone particles. The limestone particles heat treated in a flash calciner in which the mixture is entrained and heated in process gas for an amount of time sufficient to fully calcine the fine fraction but not the coarser fraction. The process gas is separated from the heated limestone mixture. The mixture is directed to a retention vessel in which the mixture is retained for an amount of time sufficient to fully calcine the coarser fraction utilizing the process heat present in the limestone mixture. No external heat needs to be added to the retention vessel during the retention step to promote calcination. 1. A method of continuously calcining a limestone particle mix comprising a fine fraction of limestone particles and a coarser fraction of limestone particles , said method comprising(a) heat treating the limestone particles in a flash calciner in which the particles are entrained and heated in process gas for an amount of time sufficient to fully calcine the fine fraction but not the coarser fraction;(b) separating the heated limestone particles from the process gas;(c) maintaining the separated heated limestone particles in a retention vessel for an amount of time sufficient to fully calcine the coarser fraction by transferring the heat contained in the fine fraction of particles to the coarser fraction of particles.2. The method of wherein the particles in the fine fraction have a nominal diameter up to about 1 mm and the particles in the coarser fraction have a nominal diameter of from greater than 1 mm to about 10 mm.3. The method of wherein the particles in the coarser fraction have a nominal diameter of from greater than 1 mm to about 4 mm.4. The method of wherein the heated limestone mixture is maintained at its minimum fluidization velocity within the retention vessel.5. The ...

OXY-CALCINATION PROCESS

Method and installation for calcining cement raw meal in a calciner whereby fuel and a calciner oxidant having an oxygen content of at least 30% vol are introduced into the calciner so as to generate either an oxidant-lean zone or a fuel-lean zone in the calciner located between the lowermost fuel inlet level and the lowermost oxidant inlet level of the calciner, between 50% and 100% by weight of the raw meal being supplied to the calciner upstream of and/or within the oxidant-lean, respectively the fuel-lean zone.

SETTING RETARDER FOR HYDRATE-FORMING BINDERS

A setting retarder for hydrate-forming binders is produced by reacting a first reactant A, including an amino acid and/or an amino acid derivative, with a second reactant C, including an amine-free carboxylic acid and/or an amine-free carboxylic acid derivative, in a reaction mixture to form a reaction product, the reaction mixture further containing at least one base, and alternatingly adding partial quantities of the at least one base and partial quantities of the second reactant C to the reaction mixture so that the reaction is carried out at a pH value in a range of from 7.5-11.5, wherein the setting retarder is in liquid or solid form. 1. A setting retarder for hydrate-forming binders produced by a method comprising:reacting a first reactant A, comprising an amino acid and/or an amino acid derivative, with a second reactant C, comprising an amine-free carboxylic acid and/or an amine-free carboxylic acid derivative, in a reaction mixture to form a reaction product, the reaction mixture further containing at least one base; andalternatingly adding partial quantities of the at least one base and partial quantities of the second reactant C to the reaction mixture so that the reaction is carried out at a pH value in a range of from 7.5-11.5,wherein the setting retarder is in liquid or solid form.2. The setting retarder according to claim 1 , wherein the first reactant A comprises an amino acid claim 1 , and the amino acid is lysine and/or thereonine.3. The setting retarder according to claim 1 , wherein the second reactant C comprises an amine-free carboxylic acid derivative.4. The setting retarder according to claim 3 , wherein the amine-free carboxylic acid derivative is a carboxylic acid anhydride.5. The setting retarder according to claim 1 , wherein the first reactant A and the second reactant C are reacted to form an amide.6. The setting retarder according to claim 1 , wherein the reaction is carried out at a temperature in a range of from 20-60° C.7. The ...

MANUFACTURING A BINDER WITH HIGH B BELITE CONTENT

The present invention relates to a method for manufacturing a binder with high β belite content comprising the steps: 1. A method for manufacturing a binder with β belite content of at least 20% by weight comprising the steps:a) providing a starting material by selecting one raw material having a Ca/Si molar ratio of 1.5 to 2.5 or by mixing two or more raw materials to obtain a starting material with the Ca/Si molar ratio of 1.5 to 2.5;b) hydrothermal treatment of the starting material produced in step a) in an autoclave at a temperature of 100 to 300° C. and a retention time of 0.1 to 24 h, wherein the water/solid ratio is from 0.1 to 100 to provide an intermediate product;c) annealing the intermediate product obtained in step b) in a flash calciner at 620 to 630° C., wherein the retention time is 1-30 seconds.2. The method according to claim 1 , wherein the molar ratio of calcium to silicon in the starting material is 2±10%.3. The method according to claim 1 , wherein primary and/or secondary raw materials are used to provide the starting material claim 1 , the primary and/or secondary raw materials being selected from the group consisting of quartz claim 1 , sand claim 1 , gravel claim 1 , limestone claim 1 , portlandite (Ca(OH)) claim 1 , burnt lime claim 1 , unburnt lime claim 1 , silicious fly ash claim 1 , calcareous fly ash claim 1 , and grain fractions from the reprocessing of cement-containing binders in building materials claim 1 , and mixtures thereof.4. The method according to claim 1 , wherein the raw material(s) is(are) are optimised with respect to particle size and particle size distribution by mechanical or thermal treatment.5. The method according to claim 1 , wherein additional elements claim 1 , also in the form of compounds claim 1 , are added in an amount from 0.1 to 30% by weight to the raw material or during the mixing of the raw materials claim 1 , for hydrothermal treatment or for annealing.6. The method according to claim 1 , wherein the ...

GYPSUM PANELS, METHODS, AND SYSTEMS

Gypsum panels and methods of making gypsum panels are provided. A method of making a gypsum panel includes combining gypsum stucco and a halide salt sequestration agent with water to form a gypsum slurry and setting the gypsum slurry to form at least a portion of a gypsum core, wherein the halide salt sequestration agent is present in an amount effective to sequester at least a portion of halide salt present in the gypsum stucco. A gypsum panel includes a gypsum core that comprises set gypsum and a halide salt sequestration agent, wherein the halide sequestration agent sequesters at least a portion of halide salt present in the gypsum core. 1. A method of making a gypsum panel , comprising:combining gypsum stucco and a halide salt sequestration agent with water to form a gypsum slurry; andsetting the gypsum slurry to form at least a portion of a gypsum core,wherein the halide salt sequestration agent is present in an amount effective to sequester at least 25 percent, by weight, of halide salt present in the gypsum stucco.2. The method of claim 1 , wherein the halide salt sequestration agent comprises alumina or perlite.3. The method of claim 1 , wherein the halide salt sequestration agent comprises activated alumina present in an amount of from about 0.01 to about 10 weight percent claim 1 , by weight of the gypsum stucco.4. The method of claim 3 , wherein the activated alumina has an average particle size of less than 1 mm.5. The method of claim 1 , wherein the halide sequestration agent comprises perlite present in an amount in an amount of from about 0.01 to about 10 weight percent claim 1 , by weight of the gypsum stucco.6. The method of claim 5 , wherein the perlite is perlite ore having an average particle size smaller than 30 mesh.7. The method of claim 5 , wherein the perlite is expanded perlite having an average particle size smaller than 16 mesh.8. The method of claim 1 , further comprising heating the halide sequestration agent prior to combining the ...

GYPSUM SLURRY, HARDENED GYPSUM, GYPSUM BUILDING MATERIAL, GYPSUM BOARD, METHOD OF PRODUCING GYPSUM SLURRY, METHOD OF PRODUCING HARDENED GYPSUM, METHOD OF PRODUCING GYPSUM BUILDING MATERIAL, AND METHOD OF PRODUCING GYPSUM BOARD

A gypsum slurry includes calcined gypsum, urea phosphate esterified starch, organopolysiloxane, and water. 1. A gypsum slurry , comprising: calcined gypsum; urea phosphate esterified starch; organopolysiloxane; and water.2. The gypsum slurry as claimed in claim 1 , wherein an amount of the urea phosphate esterified starch in the gypsum slurry is greater than or equal to 0.05 parts by mass and less than or equal to 10 parts by mass with respect to 100 parts by mass of the calcined gypsum.3. The gypsum slurry as claimed in claim 1 , wherein a gelatinization temperature of the urea phosphate esterified starch is less than or equal to 100° C.5. A hardened gypsum obtained by hardening the gypsum slurry of .6. A gypsum building material comprising the hardened gypsum of .7. A gypsum board comprising the hardened gypsum of .8. A method of producing a gypsum slurry claim 5 , the method comprising:forming a gypsum composition by mixing calcined gypsum and urea phosphate esterified starch; andforming the gypsum slurry by mixing the gypsum composition, organopolysiloxane, and water.9. The method as claimed in claim 8 , wherein an amount of the urea phosphate esterified starch in the gypsum slurry is greater than or equal to 0.05 parts by mass and less than or equal to 10 parts by mass with respect to 100 parts by mass of the calcined gypsum.10. The method as claimed in claim 8 , wherein a gelatinization temperature of the urea phosphate esterified starch is less than or equal to 100° C.12. A method of producing a hardened gypsum claim 8 , the method comprising:{'claim-ref': {'@idref': 'CLM-00008', 'claim 8'}, 'molding the gypsum slurry produced by the method of to produce a molded gypsum slurry.'}13. The method as claimed in claim 12 , further comprising:gelatinizing the urea phosphate esterified starch after molding the gypsum slurry.14. The method as claimed in claim 13 , wherein the gelatinizing includes heating the molded gypsum slurry at a temperature less than or equal ...

Method of Forming a Gypsum Based Product

A method of forming a gypsum based product is disclosed. The method comprises the steps of: calcining a mixture of water and gypsum under conditions of raised temperature and pressure within a vessel to produce an alpha-hemihydrate slurry therein; passing the alpha-hemihydrate slurry from the vessel to a mixer for mixing with additional water to produce a settable slurry, which is arranged to set to form the gypsum based product. 1. A method of forming a gypsum based product , the method comprising the steps of:calcining a mixture of water and gypsum under conditions of raised temperature and pressure within a vessel to produce an alpha-hemihydrate slurry therein;passing the alpha-hemihydrate slurry from the vessel to a mixer for mixing with additional water to produce a settable slurry, which is arranged to set to form the gypsum based product.2. A method according to further comprising the step of reducing the water content of the alpha-hemihydrate slurry to provide a separate water stream from the alpha-hemihydrate slurry.3. A method according to claim 1 , wherein the calcination step comprises substantially filling the vessel with water and gypsum so that the vessel is substantially devoid of free space claim 1 , such that the water produced during the calcination of gypsum is prevented from evaporating.4. A method according to claim 1 , wherein the raised temperature comprises a temperature within the range 110° C. to 170° C.5. A method according to claim 1 , wherein the raised pressure comprises a pressure within the range 2 to 8 Bars.6. A method according to claim 1 , further comprising the step of cooling the alpha-hemihydrate slurry after the step of calcining the mixture of water and gypsum.7. A method according to claim 6 , wherein the alpha-hemihydrate slurry is cooled to a temperature less than 100° C.8. A method according to claim 6 , comprising the further step claim 6 , after the step of cooling the alpha-hemihydrate slurry claim 6 , of de- ...

Ceramic Matrix Compositions and Uses Thereof

The present specification discloses ceramic matrix compositions, methods of making such ceramic matrix compositions and methods and uses for such ceramic matrix compositions. 1. A ceramic matrix composition comprising:about 85% to about 99% of a hydraulic gypsum cement material,about 0.1% to about 5% of a non-hydraulic gypsum cement material,about 0.1% to about 10% of a crosslinked synthetic hydrogel, andabout 0.1% to about 10% of a binder,wherein the ceramic matrix composition comprises a three-dimensional interconnected array of channels.2. The ceramic matrix composition according to claim 1 , wherein the hydraulic gypsum cement material comprises calcium sulfate hemihydrate claim 1 , a silicon dioxide and a cement.3. The ceramic matrix composition according to claim 2 , wherein the calcium sulfate hemihydrate is present in an amount of at least 85% claim 2 , at least 90% or at least 95%.4. The ceramic matrix composition according to claim 2 , wherein the silicon dioxide is present in an amount of about 0.1% to about 10% claim 2 , about 0.5% to about 7.5% or about 1% to about 5%.5. The ceramic matrix composition according to claim 2 , wherein the cement is present in an amount of about 0.1% to about 10% claim 2 , about 0.5% to about 7.5% or about 1% to about 5%.6. The ceramic matrix composition according to claim 1 , wherein the non-hydraulic gypsum cement material comprises calcium sulfate hemihydrate claim 1 , talc and a low weight carbohydrate.7. The ceramic matrix composition according to claim 6 , wherein the calcium sulfate hemihydrate is present in an amount of about 60% to about 90% claim 6 , about 65% to about 85% or about 70% to about 80%.8. The ceramic matrix composition according to claim 6 , wherein the talc is present in an amount of about 1% to about 25% claim 6 , about 2.5% to about 20% or about 5% to about 15%.9. The ceramic matrix composition according to claim 6 , wherein the low weight carbohydrate is present in an amount of about 1% to about ...

GYPSUM ADDITIVE TO CONTROL MERCURY

Additives including sulfur-containing compounds are used in methods of treating synthetic gypsum. The additives can thermally stabilize heavy metals, such as mercury. This thermal stabilization reduces mercury release from the synthetic gypsum. Illustrative, non-limiting examples of sulfur-containing compounds include inorganic sulfides, organic sulfides, organic compounds containing nitrogen and sulfur, organic compounds containing oxygen and sulfur, and polymers containing sulfur. 1. A method of treating synthetic gypsum , comprising:transporting the synthetic gypsum from a wet flue gas desulfurizer; andcontacting the synthetic gypsum with an additive, the additive comprising a sulfur-containing compound, wherein the sulfur-containing compound is a polymer comprising sulfur that is modified to contain at least one of a sulfide and a dithiocarbamate salt group.2. The method of claim 1 , wherein the polymer comprising sulfur comprises about 5 mole % to about 100 mole % of dithiocarbamate salt groups.4. The method of claim 1 , wherein the polymer comprising sulfur is formulated with a sulfide precipitant.5. The method of claim 1 , wherein the polymer comprising sulfur is formed by reacting glycidyl (meth)acrylate claim 1 , allyl glycidyl ether or [(vinyloxy)methyl]oxirane with ammonia or a primary amine to form a first product claim 1 , reacting the first product with one or more of acrylic acid claim 1 , vinyl alcohol claim 1 , vinyl acetate claim 1 , acrylamide claim 1 , methylacrylic acid claim 1 , and methylacrylamide to form a second product claim 1 , and reacting the second product with a dithiocarbamic acid salt.6. The method of claim 1 , wherein the additive comprises water.7. The method of claim 1 , wherein the synthetic gypsum is contacted by the additive in a conduit leading to a kiln.8. A method of treating synthetic gypsum claim 1 , comprising:transporting the synthetic gypsum from a wet flue gas desulfurizer; andcontacting the synthetic gypsum with an ...

CALCIUM SULPHASE-BASED PRODUCTS

A calcium sulphate-based product including gypsum and a shrinkage resistance additive. The shrinkage resistance additive is a metal nitrate, hydroxide, acetate or sulphate and is preferably provided in an amount greater than 4 wt % (based on the amount of additive and gypsum). The additive may be a nitrate of an alkali metal (e.g. potassium), an alkaline earth metal (e.g. magnesium or calcium), a transition metal (e.g. iron or zinc) or aluminium. 1. A calcium sulphate-based product comprising gypsum and a shrinkage resistance additive provided in an amount between 4 and 40 wt % based on the weight of gypsum and additive wherein the shrinkage resistance additive is a metal nitrate , hydroxide , acetate or sulphate.27-. (canceled)8. A calcium sulphate-based product comprising gypsum and a shrinkage resistance additive wherein the product is produced by drying an aqueous slurry comprising calcined gypsum and between 4.5 and 50 wt % shrinkage resistance additive (based on the weight of gypsum and additive) , the shrinkage resistance additive being a metal nitrate , hydroxide , acetate or sulphate.914-. (canceled)15. A product according to wherein the shrinkage resistance additive is a nitrate of an alkali metal claim 1 , an alkaline earth metal claim 1 , a transition metal or aluminium.16. A product according to wherein the shrinkage resistance additive is a nitrate of magnesium claim 1 , aluminium claim 1 , zinc claim 1 , iron or copper.17. A product according to wherein the shrinkage resistance additive is selected from: the nitrate claim 1 , hydroxide claim 1 , acetate or sulphate of magnesium claim 1 , aluminium or zinc; or the nitrate claim 1 , hydroxide or acetate of iron.18. A product according to wherein the product is a building material or a mould for metal casting.19. A product according to wherein the product is a composite wallboard comprising a core of the gypsum and shrinkage resistance additive sandwiched between two liners.20. A calcium sulphate-based ...

Calcining kettle, calcining system, and method

A calcining kettle includes an outer kettle shell, an inner kettle shell, an interior heat exchanger assembly defining at least one tortuous path inside a volume defined by the inner kettle shell, and an agitator within the inner kettle shell. The inner kettle shell is disposed within the outer kettle shell such that the inner kettle shell and the outer kettle shell together at least partially define a jacket adjacent the inner kettle shell. The inner kettle shell and the interior heat exchanger assembly at least partially define a processing volume. The agitator is configured to rotate at least one paddle to cause movement of a feedstock material within the processing volume. A heating device may be structured and adapted to circulate a heat transfer fluid in the at least one tortuous path and the jacket. Calcining methods are also disclosed.

FIRE RESISTANT CALCIUM SULPHATE-BASED PRODUCTS

The present invention provides a calcium sulphate-based product (e.g. a wall board) comprising gypsum, a pozzolan source such as a clay additive, rice husk ash or diatomaceous earth and a metal salt additive. The product may be produced by drying an aqueous slurry comprising calcined gypsum, the pozzolan source and the metal salt additive. The clay additive may be a kaolinitic clay. The metal salt additive may be a magnesium salt e.g. magnesium nitrate, magnesium chloride or magnesium hydroxide. 156-. (canceled)57. A calcium sulphate-based product comprising gypsum , a pozzolan source and a metal salt additive wherein the metal salt additive is provided in an amount between 5 and 25 wt % (based on the weight of the gypsum , pozzolan source and metal salt) and the metal salt is a nitrate or a chloride.58. A calcium sulphate-based product according to wherein the pozzolan source is a kaolinitic clay additive and is included in an amount between 5 and 30 wt % (based on the weight of the gypsum claim 57 , clay additive and metal salt additive).59. A calcium sulphate-based product according to wherein the pozzolan source is rice husk ash or diatomaceous earth and is included in an amount equal to or greater than 20 wt %.60. A calcium sulphate-based product according to wherein the wt % amount of metal salt and the wt % amount of pozzolan source is equal.61. A calcium sulphate-based product according to comprising 50-85 wt % gypsum.62. A calcium sulphate-based product formed from drying an aqueous slurry containing calcined gypsum claim 57 , a pozzolan source and a metal salt additive wherein the metal salt additive is provided in the slurry in an amount between 5 and 25 wt % (based on the weight of the calcined gypsum claim 57 , pozzolan source and metal salt) and the metal salt is a nitrate or a chloride.63. A calcium sulphate-based product according to wherein the pozzolan source is a kaolinitic clay additive and is included in the slurry in an amount between 5 and 30 ...

METHOD FOR PRODUCING CALCIUM SULFATE

A method for preparing calcium sulphate comprising a production of DCP by the attack of a source of phosphate by an acid, a digestion of the isolated DCP by the sulphuric acid under conditions giving rise to the formation of a first slurry of gypsum suspended in an acidic aqueous phase having a content of free SOequal to or less than 1.5% and a content of free PO, a conversion of at least part of said first slurry by heating to a temperature greater than 80° C. and potentially by adding sulphuric acid, with solubilisation of the gypsum crystals and recrystallisation of the solubilised calcium sulphate in a second slurry of α-calcium sulphate hemihydrate crystals suspended in an aqueous phase based-on phosphoric acid, wherein the content of free SOis less than 10% by weight, and a separation between said aqueous phase and a filter cake based on particularly pure α-calcium sulphate hemihydrate. 1. A method for preparing calcium sulphate comprising the steps of: attack in an aqueous medium of a source of phosphate by an acid with the formation of a pulp comprising an aqueous phase containing water-soluble calcium phosphate and a solid phase containing impurities,', 'separation of the aqueous phase,', 'neutralisation neutralization of the latter by a neutralizing calcium compound with precipitation of said calcium monohydrogen phosphate in an aqueous solution, and', 'isolation of the precipitated calcium monohydrogen phosphate from said aqueous solution, and, 'producing calcium monohydrogen phosphate by{'sub': 2', '5, 'digesting the isolated calcium monohydrogen phosphate in an aqueous medium by sulphuric acid under conditions giving rise to the formation of a first slurry of calcium sulphate dihydrate crystals suspended in an acidic aqueous phase having a content of free PO,'}{'sub': '3', 'wherein digestion is carried out in order to obtain, in the first slurry, a content of free SOequal to or less than 1.5% by weight of the first slurry, and'} {'sub': '3', 'converting ...

ACCELERATOR COMPRISING STARCH, AND RELATED BOARD, SLURRIES, AND METHODS

An accelerator for accelerating the rate of hydration of calcined gypsum is disclosed. The accelerator comprises calcium sulfate dihydrate particles and a starch. The starch has a cold water solubility of at least about 25% (e.g., at least about 35%) and a viscosity of about 25 Brabender Units (BU) or less when the starch is in a 30% aqueous slurry at 92° C. Also disclosed are a method of preparing an accelerator, method of hydrating stucco to form set gypsum, slurry, and method of making gypsum board. 1. An accelerator comprising particles of calcium sulfate dihydrate , and starch having a cold water solubility of at least about 25% and a viscosity of about 25 Brabender Units (BU) or less when the starch is in a 30% aqueous slurry at 92° C.2. The accelerator of claim 1 , wherein the particles of calcium sulfate dihydrate have an average particle size of from about 20 μm to about 50 μm.3. The accelerator of claim 1 , wherein the starch has a cold water solubility of at least about 35%.4. The accelerator of claim 3 , wherein the accelerator is prepared by co-grinding the calcium sulfate dihydrate in the presence of the starch.5. The accelerator of claim 4 , wherein the starch has an average particle size of from about 20 μm to about 100 μm prior to co-grinding.6. The accelerator of claim 4 , wherein the starch is present in an amount from about 1% to about 10% by weight of the accelerator.7. The accelerator of claim 4 , wherein the co-grinding occurs in a ball mill.8. The accelerator of claim 4 , wherein the co-grinding occurs for a period of from about 10 minutes to about 90 minutes.9. A method of preparing gypsum board comprising:(a) providing a first cover sheet;(b) mixing a slurry comprising stucco, water, and an accelerator comprising calcium sulfate dihydrate particles and starch having a cold water solubility of at least about 25% (e.g., at least about 35%), and a viscosity of about 25 Brabender Units (BU) or less when the starch is in a 30% aqueous starch ...

METHOD FOR DENITRIFICATION OF BYPASS EXHAUST GASES IN A PLANT FOR PRODUCING CEMENT CLINKER

Denitrifying bypass exhaust gases in a cement clinker producing plant. The plant comprises a rotary kiln connected to a calciner for the deacidification of raw material or to a rotary kiln riser shaft via a rotary kiln inlet chamber, and the bypass exhaust gas being drawn off in the region of the rotary kiln inlet chamber. The method comprises: cooling the bypass gas to between 260 C and 400 C in a cooling device, injecting an ammonia-, urea-, and/or ammonium-containing substance into the cooled bypass gas, introducing the cooled and mixed bypass gas into a ceramic filter system to filter out any halide and sulfate of the alkali metals and alkaline-earth metals precipitated during cooling the gas, and any nitrogen not reacted by the injected substances is chemically selectively reduced over a catalytic converter which is located in or directly downstream of the ceramic filter system. 110-. (canceled)11. A process for the denitrification of bypass exhaust gases in a plant for producing cement clinker ,where the plant has, in the gas flow direction, a rotary tube furnace upstream of a calciner for sintering of the cement clinker, andwhere the rotary tube furnace is connected via a rotary tube furnace inlet chamber to the calciner for deacidification of raw meal or to a rotary tube furnace riser shaft, andwhere the bypass exhaust gas is taken off in the region of the rotary tube furnace inlet chamber, comprising the steps:cooling the bypass exhaust gas to a temperature in the range from 260° C. to 400° C. in a cooling apparatus, 'where the at least one of the ammonia, the urea or the ammonium at least partially converts the free-radical gas constituents present in the cooled bypass gas into non-free-radical gas constituents by at least one of hydrolysis, partial oxidation, or partial reduction,', 'injecting at least one of an ammonia-, urea- or ammonium-containing substance into the cooled bypass exhaust gas,'} a) at least one of lithium fluoride, lithium chloride, ...

AMORPHOUS LOW-CALCIUM CONTENT SILICATE HYDRAULIC BINDERS AND METHODS FOR THEIR MANUFACTURING

The invention relates to a hydraulic binder consisting essentially in a hydraulically active amorphous calcium silicate phase, having in its constitution less than 20% in weight of a crystalline material. The said hydraulically active amorphous calcium silicate phase is a continuous matrix that may contain embedded fractions of crystalline material, being the overall C/S molar ratio of this hydraulic binder comprised between 0.8 and 1.25. The crystalline fraction of this material is essentially composed by wollastonite in both of its polymorphic structures, α and β. Furthermore, the invention relates to methods of producing the hydraulic binder by liquefying the raw materials, in a specified C/S molar ratio, followed by fast cooling to room temperature. Finally, the invention relates to a building material made by setting the binder or a mixture containing this binder with water and subsequent hardening. The invention enables the production of a hydraulic binder with a significant reduction of CO2 emissions, when compared to OPC clinker, by reducing the amount of limestone in the raw materials while obtaining competitive overall values of compressive strength of the hardened material. 1. A hydraulic binder comprising in a continuous amorphous calcium silicate matrix containing less than 20% in weight of a wollastonite crystalline phase in any of its a or 3 polymorphs , with an overall C/S molar ratio in the range from 0.8 to 1.25.2. The hydraulic binder of any of claim 1 , wherein a part of the calcium or silicon of the hydraulically active amorphous silicate phase is substituted by a metal selected from Al claim 1 , Fe claim 1 , Mgr B claim 1 , S claim 1 , P claim 1 , K claim 1 , Na claim 1 , or any combination thereof claim 1 , in particular from 1% to 20%.3. A mixture containing at least 10% in weight of the hydraulic binder of and wherein a part of the calcium or silicon of the hydraulically active amorphous silicate phase is substituted by a metal selected from ...

METHOD FOR TREATING GYPSUM

The present invention relates to a method for producing a gypsum-containing foamed prefabricated building material and to a gypsum-containing foamed prefabricated building material. 116.-. (canceled)18. The method according to claim 17 , wherein the ketene dimer is employed in the form of an aqueous dispersion.19. The method according to claim 18 , wherein the gypsum hemihydrate or anhydrite is used in solid form or in the form of an aqueous suspension.20. The method according to claim 18 , wherein the aqueous ketene dispersion is stabilized by a protective colloid.21. The method according to claim 20 , wherein the protective colloid is a starch claim 20 , a cellulose or a cellulose modified by ammonium structural units.22. The method according to claim 18 , wherein the aqueous ketene dispersion comprises 1 to 60 wt % of ketene dimer claim 18 , based on the total weight of the dispersion.23. The method according to claim 18 , wherein the disperse phase of the aqueous ketene dispersion has an average diameter of less than 10 μm.24. The method according to claim 17 , wherein 0.02 to 8.0 wt % claim 17 , in particular 0.1 to 5 wt % claim 17 , of the ketene dimer claim 17 , based on the mass of the gypsum hemihydrate or anhydrite claim 17 , is used.25. The method according to claim 17 , wherein the gypsum hemihydrate or anhydrite is selected from the group consisting of α-hemihydrate claim 17 , α/β-hemihydrate claim 17 , β-hemihydrate claim 17 , natural anhydrite claim 17 , synthetic anhydrite and anhydrite obtained from flue gas desulfurization claim 17 , and mixtures thereof.26. The method according to claim 17 , wherein a fatty alkylsulfate or fatty alkylethersulfate is used as a tenside for preparing the foam.27. The method according to claim 17 , wherein the foam has a density from about 50 to 300 g/l.28. The method according to claim 17 , wherein 0.01 to 2 g surfactant per kg gypsum hemihydrate or anhydrite are used.30. A building material prepared according to the ...

MULTI-LAYER GYPSUM BOARD AND RELATED METHODS AND SLURRIES

Disclosed is a composite gypsum board comprising a board core and a concentrated layer, as well as related methods of preparing board and slurries. The board core and the concentrated layer both are formed from water and stucco. The concentrated layer is designed to have higher density and/or nail pull than the core. The concentrated layer is further formed from one or more of starch thickener, cellulose, and/or copolymer containing polyacrylamide and acrylic acid. In some embodiments, the concentrated layer is formed from an enhancing additive to enhance strength therein, while the core is formed without using enhancing additive or less enhancing additive than used in forming the board core. 1. A composite gypsum board comprising:(a) a board core comprising set gypsum formed from a first slurry comprising water and stucco, the core having first and second core faces; and (i) starch thickener,', '(ii) cellulose, and/or', '(iii) copolymer containing polyacrylamide and acrylic acid., '(b) a concentrated layer disposed in bonding relation to the first core face and formed from a second slurry comprising water, stucco, and at least one of the following2. The composite gypsum board of claim 1 , wherein the first slurry is substantially free of (i) starch thickener claim 1 , (ii) cellulose claim 1 , and (iii) copolymer containing polyacrylamide and acrylic acid.3. The composite gypsum board of claim 1 , wherein the starch thickener claim 1 , cellulose claim 1 , and/or copolymer increases the viscosity of the first slurry by at least about 100% within 30 seconds.4. The composite gypsum board of claim 1 , the board core having first and second faces and a first thickness;the concentrated layer having a second thickness, the first thickness being greater than the second thickness; andthe concentrated layer having a first face and a second face, the concentrated layer first face facing the board core first core face, the board further comprising a top cover sheet facing the ...

MULTI-LAYER GYPSUM BOARD AND RELATED METHODS AND SLURRIES

Disclosed is a composite gypsum board comprising a board core and a concentrated layer, as well as related methods of preparing board and slurries. The board core and the concentrated layer both are formed from water and stucco. The concentrated layer is designed to have higher density and/or nail pull than the core. The concentrated layer is further formed from a polysaccharide that forms a complex with calcium ions, e.g., an alginate compound such as sodium alginate. In some embodiments, the concentrated layer is formed from an enhancing additive to enhance strength therein, while the core is formed without using enhancing additive or less enhancing additive than used in forming the board core. 1. A composite gypsum board comprising:(a) a board core comprising set gypsum formed from a first slurry comprising water and stucco, the core having first and second core faces; and(b) a concentrated layer disposed in bonding relation to the first core face and formed from a second slurry comprising water, stucco, and a polysaccharide that forms a complex with calcium ions.2. The composite gypsum board of claim 1 , wherein the polysaccharide is an alginate compound.3. The composite gypsum board of claim 2 , wherein the alginate compound is sodium alginate.4. The composite gypsum board of claim 1 , wherein the first slurry is substantially free of polysaccharide.5. The composite gypsum board of claim 4 , wherein the first slurry is substantially free of sodium alginate.6. The composite gypsum board of claim 1 , wherein the polysaccharide that forms a complex with calcium ions increases the viscosity of the slurry by at least about 100% within 10 seconds.7. The composite gypsum board of :the first slurry optionally including an enhancing agent and the second slurry including the enhancing agent, the core having first and second faces and a dry density;the concentrated layer disposed in bonding relation to the first core face, the concentrated layer having a dry density of at ...

METHOD FOR PRODUCING CEMENTING MATERIALS PRODUCED FROM THE RECYCLING OF INDUSTRIAL WASTE FROM THE PROCESSES OF PRODUCING CERAMICS AND BRICKS

A method for producing a cementing material from the waste from the brick and ceramics industry is provided, the method being selecting the batches of waste from bricks and ceramics for a subsequent grinding, in which they should achieve a grain size of between 20 and 40 microns, and wherein this waste can be mixed together or used individually to be subsequently included in the cement in a proportion of up to 30%, wherein the mixtures can achieve designs of up to 4000 PSI. 1. A method for producing cementitious materials made from the recycling of industrial waste from the processes of production of ceramics and brick , comprising:a. selecting structural and nonstructural brick waste or byproducts, which have been fired at a temperature of between 500 and 1000° C.b. selecting ceramic parts waste, which have been fired at a temperature of between 700 and 1200° C.c. separately crushing the waste selected in steps a and b until obtaining particle sizes of between 10 and 80 microns.d. mixing crushed fines resulting from step c, from 40 to 60% of fines from brick waste and 40 to 60% of waste from ceramic parts.2. The method for producing cementitious materials made from the recycling of industrial waste from the processes of production of ceramics and brick according to claim 1 , wherein the material selected from steps a and b have a humidity of less than 1%.3. The method for producing cementitious materials made from the recycling of industrial waste from the processes of production of ceramics and brick according to claim 1 , wherein the cementitious material resulting from step d is incorporated into matrices of cement and/or concrete in a range from 0.5% to 40%. The present invention reveals a procedure for processing waste from the brick and ceramics industry, having the objective of the use thereof in the cement industry, entailing significant energy and economic saving in the related 15 industries, for example those of construction and infrastructure.The cement ...

GYPSUM PRODUCT COMPOSITION, GYPSUM PRODUCTS, AND A METHOD FOR USING A COMPOUND IN GYPSUM BOARD

A gypsum board composition was disclosed which comprises stucco, adhesive, water and additive for improving bonding, wherein the additive for improving bonding is shown in chemical formula as MM(OH)(A).mHO, wherein Mis a divalent metal ion, Mis a trivalent metal ion, and A is an interlayer anion, and wherein Mand Mare different metals. Also, a gypsum board made with the composition of the above and a method for using a compound shown in the aforesaid chemical formula were disclosed. 1. A gypsum board composition , comprising:stucco, adhesive, water and additive for improving bonding, {'br': None, 'sup': I', 'II', 'n−, 'sub': 2', '2, 'i': 'm', 'MM(OH)(A).HO\u2003\u2003(1),'}, 'wherein the additive for improving bonding is shown in chemical formula (1){'sup': I', 'II', 'n−', 'I', 'II, 'wherein Mis a divalent metal ion, Mis a trivalent metal ion, and A is an interlayer anion, and wherein Mand Mare different metals.'}2. The composition according to claim 1 , wherein Mis selected from a group consisting of Mg claim 1 , Ni claim 1 , Fe claim 1 , Ca claim 1 , Zn claim 1 , Cu claim 1 , and Mn claim 1 , wherein Mis selected from a group consisting of Fe claim 1 , Al claim 1 , Ni claim 1 , and Ca claim 1 , and wherein A is selected from a group consisting of CO claim 1 , OH claim 1 , NO claim 1 , PO claim 1 , and SO.3. The composition according to claim 1 , wherein M claim 1 , is Mg claim 1 , Mis Al claim 1 , and A is CO.4. The composition according to claim 1 , wherein the content of the additive for improving bonding is less than or equal to 5 wt. % and greater than 0 wt. % of the stucco.5. The composition according to claim 1 , wherein the adhesive is starch and/or Polyvinyl Alcohol claim 1 , wherein the content of the adhesive is greater than 0.06 wt. % of the stucco.6. The composition according to claim 1 , wherein the content of the additive for improving bonding is less than or equal to 5 wt. % and greater than 0 wt. % of the stucco claim 1 , and the content of the ...

Batch-continuous reactor

Material increases in throughput and output of batch-type reactors are obtained by avoiding operational time losses in dumping and filling and startup. The improvements are achieved by a flexible divider which extends upwards from the bottom of the unit and which moves from one side of the reactor to the other to increase and decrease, respectively, the volumes of the sections of the reactor. One section can be functional while the other section is being emptied and refilled. The combined output of the sections approaches the output of a continuous reactor.

Installation for producing diesel and cement comprises a nuclear power station, a water electrolysis plant, a cement works, a reverse water gas balanced reactor and a Fischer-Tropsch reactor

Installation for producing diesel and cement comprises a nuclear power station, a water electrolysis plant, a cement works, a reverse water gas balanced reactor and a Fischer-Tropsch reactor.

High temperature sag resistant lightweight gypsum board

A high temperature sag resistant lightweight wallboard. The addition of a small amount of urea (about 0.1%) significantly improves the high-temperature sag resistance on Type X gypsum wallboards. These gypsum wallboards may have a board weight of less than 2100 lbs/msf when cast to have an overall 5.8 inch thickness, and may include glass fibers and/or mineral wool. Also, methods of making the gypsum wallboard and a wall system for employing the gypsum wallboard.

Cementitious article and method for preparing the same

A cementitious article and a method of making a cementitious article are disclosed. The cementitious article comprises a cementitious component that comprises a polyvinyl acetate type polymer, a monobasic phosphate, and optionally boric acid. Cementitious articles, such as board, are prepared such that the polyvinyl acetate type polymer, the monobasic phosphate, and optionally boric acid can be present in the cementitious core, and/or in dense layers if present. The concentration of the polyvinyl acetate type polymer, monobasic phosphate, and optionally boric acid in the cementitious article can increase from a central region A to peripheral regions B and C, respectively. In some embodiments, the polyvinyl acetate type polymer is a polyvinyl alcohol and the monobasic phosphate is monoammonium phosphate.

Foerfarande foer rekristallisering av gips.

Phosphoanhydrite process

建筑装饰砂浆及其应用

本发明涉及一种建筑装饰砂浆及其应用，按重量份数计包括硅酸盐水泥24～28份、高铝水泥40～65份、石膏7～15、40～70目石英砂200～240份、70～140目石英砂440～475份、木质纤维0.5～2.2份及金属合金颜料5～33份。该建筑装饰砂浆，以硅酸盐水泥、高铝水泥和石膏为胶凝体系，硅酸盐水泥和高铝水泥能遇水迅速和石膏生成钙钒石，钙钒石包裹在水泥熟料的表面形成保护膜，避免了氢氧化钙的生成和进一步水化，进而减少了碱生成，克服了泛碱问题。高铝水泥和硅酸盐水泥两者在水化过程中共同生成水化钙黄长石，采用上述级配石英砂和木质纤维，进一步保证了其力学强度和耐久性能。而且其能反射太阳光中10％～20％红外辐射，起到隔热节能的作用。

Porous silica-based material and portlandite for filling insulating brick with controlled structure and corresponding production method

FIELD: construction. SUBSTANCE: present invention relates to a method for preparing a porous material containing silica and calcium hydroxide. Method for preparing a porous material containing 25 wt% to 75 wt% of silica and from 75 wt% to 25 wt% of calcium hydroxide comprises the following successive steps: a step synthesising quicklime, a step of mixing the quicklime obtained in the previous step, water and silica according to a molar ratio of CaO/SiO 2 of between 0.8 to 1.2, and a weight ratio of water/(CaO+SiO 2 ) of between 2 to 60; a step of hydrothermal synthesis at a saturation water-vapour pressure of higher than or equal to 10 5 Pa (1 bar) and lower or equal to 3×10 5 Pa (3 bar) and at a temperature higher than or equal to 80 °C and lower than 150 °C, a step of drying the ceramic body obtained at a temperature of 100-450 °C. EFFECT: production of highly insulating building bricks. 15 cl, 2 tbl, 7 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 592 909 C2 (51) МПК C04B 2/10 (2006.01) C04B 28/18 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2014103102/03, 25.06.2012 (24) Дата начала отсчета срока действия патента: 25.06.2012 (72) Автор(ы): ДЕЛЬ-ГАЛЛО Паскаль (FR), КАНТОННЕ Жером (FR) 30.06.2011 EP 11172043.9 (43) Дата публикации заявки: 10.08.2015 Бюл. № 22 R U (73) Патентообладатель(и): Л'ЭР ЛИКИД, СОСЬЕТЕ АНОНИМ ПУР Л'ЭТЮД Э Л'ЭКСПЛУАТАСЬОН ДЕ ПРОСЕДЕ ЖОРЖ КЛОД (FR) Приоритет(ы): (30) Конвенционный приоритет: (45) Опубликовано: 27.07.2016 Бюл. № 21 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 30.01.2014 (86) Заявка PCT: 2 5 9 2 9 0 9 (56) Список документов, цитированных в отчете о поиске: WO2010001000 A1, 07.01.2010. WO 2010000999 A1, 01.07.2010. EP 0264550 A2, 27.04.1988. RU 2303015 C1, 20.07.2007. 2 5 9 2 9 0 9 R U (87) Публикация заявки PCT: WO 2013/000859 (03.01.2013) Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, строение 3, ООО "Юридическая фирма ...

Способ обжига цементного клинкера и устройство дл его осуществлени

Способ изготовления смеси альфа и бета штукатурного гипса очень низкой консистенции

Изобретение может быть использовано в производстве строительных материалов. Способ изготовления продукта, содержащего альфа полугидрат сульфата кальция и бета полугидрат сульфата кальция, включает подачу 50-75 мас.% гипсовой суспензии в первый реактор, причем суспензия содержит дигидрат сульфата кальция и воду, и кальцинацию суспензии в реакторе при условиях, достаточных для образования частично кальцинированной суспензии, содержащей воду, дигидрат сульфата кальция и альфа полугидрат сульфата кальция. Суспензию выдерживают в первом реакторе при условиях кальцинации гипса до преобразования от 50 до 95% гипса в альфа полугидрат сульфата кальция. Затем добавляют по меньшей мере один модификатор роста кристаллов к дигидрату сульфата кальция и воде перед указанной кальцинацией в первом реакторе. Далее обезвоживают частично кальцинированную суспензию с образованием водного потока и обезвоженной твердой фазы, включающей дигидрат сульфата кальция и альфа полугидрат сульфата кальция. Обезвоженную твердую фазу подают во второй реактор и кальцинируют для преобразования по меньшей мере части дигидрата сульфата кальция обезвоженной твердой фазы в бета полугидрат сульфата кальция. Кальцинацию обезвоженной твердой фазы осуществляют в гипсоварочном котле, работающем при атмосферном давлении и температуре от 66 до 538°C. Изобретение позволяет снизить консистенцию штукатурного гипса. 16 з.п. ф-лы, 4 ил., 4 табл., 3 пр. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 458 014 (13) C2 (51) МПК C04B 11/02 (2006.01) C01F 11/46 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (72) Автор(ы): Ю Кьянг (US), ЛИНН Майкл Р. (US), СОНГ Вейксин Дэвид (US), ЛИУ Кингксья (US), КЛАУД Майкл Ли (US) (21)(22) Заявка: 2009110959/05, 22.08.2007 (24) Дата начала отсчета срока действия патента: 22.08.2007 (43) Дата публикации заявки: 10.11.2010 Бюл. № 31 (73) Патентообладатель(и): Юнайтед Стэйтс Джипсам Компани (US) 2 4 5 8 0 1 4 (45) Опубликовано: 10.08.2012 Бюл. № 22 ...

Organomineral modifier for gypsum compositions and radioprotective articles based thereon

FIELD: construction. SUBSTANCE: invention relates to construction materials, specifically to additives used in making gypsum compositions and radioprotective articles based thereon. Disclosed is an organomineral modifier for gypsum compositions and radioprotective articles based thereon, which includes a hydraulic binder, an active mineral component, a plasticising additive and a setting time regulator, as an active mineral component, it contains metakaolin, as a plasticising additive - an aqueous solution of Glenium Ace 430 polycarboxylate ester, Best-SPl superplasticizer and further contains an aqueous emulsion of Octyltriethoxysilane Penta-818 and ground schungite with the following content of components, wt. %: hydraulic binder 35.81–55.79, metakaolin 7.16–11.16, aqueous solution of polycarboxylate ester "Glenium Ace 430" 2.69–4.18, super-plasticizer "Best-SPL" 0.45–0.7, water emulsion octyltriethoxysilane "Penta-818" 0.18–0.28, ground schungite 27.89–53.71, wherein the degree of shungite grinding is 200–300 m 2 /kg, metakaolin hydraulic activity is not less than 1200 mg/g. EFFECT: technical result obtained by using the invention is to extend the setting time of the gypsum mixture, giving it self-sealing ability, increase the strength and water resistance of products based on gypsum binder while simplifying the technology of their production and giving them radioprotective properties. 1 cl, 1 dwg, 1 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) (19) RU (11) (13) 2 710 643 C2 (51) МПК C04B 11/00 (2006.01) C04B 28/14 (2006.01) C04B 24/26 (2006.01) G21F 1/04 (2006.01) C04B 111/20 (2006.01) C04B 111/27 (2006.01) C04B 111/62 (2006.01) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК C04B 11/00 (2019.05); C04B 28/14 (2019.05); C04B 24/26 (2019.05); G21F 1/04 (2019.05); C04B 2111/27 (2019.05); C04B 2111/62 (2019.05); C04B 2111/20 (2019.05) (21)(22) Заявка: 2018117985, 15.05.2018 15.05.2018 Дата регистрации: 30.12.2019 ...

Method for continuous modification of gypsum dihydrate and modified gypsum dihydrate obtained using said method

FIELD: chemistry. SUBSTANCE: invention can be used in the production of building materials. The method of modifying gypsum dihydrate involves a step of forming a semihydrate on which crude gypsum dihydrate is calcined to gypsum semihydrate, and recrystallisation step on which the gypsum semihydrate is hydrated and recrystallised in an aqueous suspension to modified gypsum dihydrate. At the recrystallisation step, the aqueous suspension is held in the reaction vessel at constant temperature while stirring such that the aqueous suspension becomes homogeneous. Feeding of the gypsum semihydrate and outputting the recrystallised and modified gypsum dihydrate is carried out continuously or intermittently. EFFECT: invention enables to obtain modified gypsum dihydrate, having mean particle size of at least 64 mcm and purity of 95% or higher. 16 cl, 5 dwg, 2 tbl, 17 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 472 706 (13) C2 (51) МПК C01F 11/46 (2006.01) C04B 11/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2011102297/05, 31.07.2009 (24) Дата начала отсчета срока действия патента: 31.07.2009 (73) Патентообладатель(и): ЙОСИНО ГИПСУМ КО., ЛТД. (JP) (43) Дата публикации заявки: 10.09.2012 Бюл. № 25 2 4 7 2 7 0 6 (45) Опубликовано: 20.01.2013 Бюл. № 2 (56) Список документов, цитированных в отчете о поиске: JP 2008-081329 A, 10.04.2008. JP 2006273599 A, 12.10.2006. JP 2002-029740 A, 29.01.2002. JP 2006-143503 A, 08.06.2006. RU 2101252 C1, 10.01.1998. 2 4 7 2 7 0 6 R U (86) Заявка PCT: JP 2009/063666 (31.07.2009) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 28.02.2011 (87) Публикация заявки РСТ: WO 2010/013807 (04.02.2010) Адрес для переписки: 191186, Санкт-Петербург, а/я 230, "АРСПАТЕНТ", пат. пов. В.В.Дощечкиной, рег.№ 869 (54) СПОСОБ НЕПРЕРЫВНОЙ МОДИФИКАЦИИ ДИГИДРАТА ГИПСА И МОДИФИЦИРОВАННЫЙ ДИГИДРАТ ГИПСА, ПОЛУЧЕННЫЙ ЭТИМ СПОСОБОМ (57) Реферат: Изобретение может быть использовано в ...

Dry construction mixture based on gypsum binder and method for production of light concretes to make panels, walls, floors, roofs and heat insulation of building slabs

FIELD: construction. ^ SUBSTANCE: dry construction mix contains the following components, wt %: gypsum binder - construction gypsum 73.0-85.0, slaked lime 10.0-16.0, polycarboxylate, at least one, selected from the following group: sodium polycarboxylate, polycarboxylate Melflux 1641F, GP-1, Sika ViskoCrete 225P and BPS BV T/C 1.3-3.0, carboxymethylcellulose 3.0-5.6, aluminium sulfate 0.4-0.9, sodium gluconate 0.3-1.5, besides it is prepared by mixing specified components in disintegration mixer for 2-3 minutes at speed of mixer rotation of 2500-3000 rpm. Method for application of specified mix is characterised by the fact that it is added to light porous filler with fraction of at least 5 mm at the ratio of weight of specified filler to dry construction mix in the range of 1.8-6.4, at the same time filler is previously wetted with water taken to produce water and gypsum ratio in the range of 0.32-0.59. ^ EFFECT: reduced power inputs in process of drying, low consumption of binding material, increased strength, water resistance and thermal resistance of produced heat insulation material. ^ 4 cl, 3 tbl, 14 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 404 146 (13) C1 (51) МПК C04B 11/00 C04B 38/08 (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21), (22) Заявка: 2009117765/03, 13.05.2009 (24) Дата начала отсчета срока действия патента: 13.05.2009 (45) Опубликовано: 20.11.2010 Бюл. № 32 (72) Автор(ы): Долгорев Василий Анатольевич (RU) (73) Патентообладатель(и): Долгорев Василий Анатольевич (RU) R U 2 4 0 4 1 4 6 (56) Список документов, цитированных в отчете о поиске: RU 2007131242 A, 27.02.2009. RU 2260572 C1, 20.09.2005. RU 2006141693 A, 10.06.2008. RU 2344937 C1, 27.01.2009. RU 2338724 C1, 20.11.2008. SU 1527207 A1, 07.12.1989. US 5702828 A, 30.12.1997. CN 101255046 A, 03.09.2008. 2 4 0 4 1 4 6 R U (54) СУХАЯ СТРОИТЕЛЬНАЯ СМЕСЬ НА ОСНОВЕ ГИПСОВОГО ВЯЖУЩЕГО И СПОСОБ ПОЛУЧЕНИЯ ЛЕГКИХ ...

Artificial rock

FIELD: chemistry. ^ SUBSTANCE: invention relates to a composition for producing artificial rock and can be used in the industry of construction materials, particularly when making decorative tiles for floors and walls. The artificial rock is made from a composition which contains the following in wt %: gypsum cement 30-35; calcium carbonate-based sand 20-25; calcium silicate 2-3; carbon silicide 1-2; glauconite ground to particle size 2-3 mm 16-21; water 20-25. ^ EFFECT: obtaining environmentally safe artificial rock. ^ 1 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 433 095 (13) C1 (51) МПК C04B 28/00 (2006.01) B44F 9/04 (2006.01) C04B 111/54 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ На основании пункта 1 статьи 1366 части четвертой Гражданского кодекса Российской Федерации патентообладатель обязуется заключить договор об отчуждении патента на условиях, соответствующих установившейся практике, с любым гражданином Российской Федерации или российским юридическим лицом, кто первым изъявил такое желание и уведомил об этом патентообладателя и федеральный орган исполнительной власти по интеллектуальной собственности. (24) Дата начала отсчета срока действия патента: 17.06.2010 (73) Патентообладатель(и): Щепочкина Юлия Алексеевна (RU) (45) Опубликовано: 10.11.2011 Бюл. № 31 (54) ИСКУССТВЕННАЯ ПОРОДА (57) Реферат: Изобретение относится к составу для изготовления искусственной породы и может найти применение в промышленности строительных материалов, в частности, при изготовлении декоративных плит для отделки потолков и стен. Искусственная порода изготовлена из состава, включающего, мас.%: строительный гипс 30-35; песок на основе карбоната кальция 20-25, силикат кальция 2-3; силицид углерода 1-2; молотый до фракции 2-3мм глауконит 16-21: вода 20-25. Технический результат получение искусственной экологически безопасной породы. 1 табл. R U 2 4 3 3 0 9 5 Адрес для переписки: 153000, г.Иваново, ул. ...

煅烧方法和煅烧设备

本发明涉及一种用于煅烧粉末状或者微小颗粒状石膏的方法，具有两个步骤：在煅烧研磨机(3)中对石膏快速煅烧和在反应容器(6)中对热石膏再煅烧。根据本发明设计如下，即反应容器(6)中的再煅烧在加入潮湿气体的条件下完成，在此不对反应容器(6)进行加热。再煅烧经过很长的停留时间完成，该停留时间至少10倍于，优选50到100倍于快速煅烧时的停留时间。本发明在没有额外能源消费下实现了煅烧的完成，在此额外地在快速煅烧时进一步将存留的二水合物转化为半水化物而减小了不期望的硬石膏成分。由此既实现了产品质量的标准化也实现了产品质量的提高。可以降低位于前面的煅烧研磨机(3)的温度，这使额外的节约能源成为可能。本发明也可以用于加速煅烧后石膏的老化。

Gypsum-concrete mix

FIELD: chemistry. ^ SUBSTANCE: invention relates to composition of gypsum-concrete mix and can be used in the industry of building materials for making slabs and panels. The gypsum-concrete mix contains the following in wt %: gypsum 26.0-30.0, chamotte with specific surface area of 2500-4000 cm2/g 39.5-46.5, polysiloxane 0.5-1.5; water 17.0-30.0. ^ EFFECT: high water resistance. ^ 1 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 422 396 (13) C1 (51) МПК C04B 28/14 (2006.01) C04B 111/27 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ На основании пункта 1 статьи 1366 части четвертой Гражданского кодекса Российской Федерации патентообладатель обязуется заключить договор об отчуждении патента на условиях, соответствующих установившейся практике, с любым гражданином Российской Федерации или российским юридическим лицом, кто первым изъявил такое желание и уведомил об этом патентообладателя и федеральный орган исполнительной власти по интеллектуальной собственности. (24) Дата начала отсчета срока действия патента: 04.02.2010 (73) Патентообладатель(и): Щепочкина Юлия Алексеевна (RU) (45) Опубликовано: 27.06.2011 Бюл. № 18 (54) ГИПСОБЕТОННАЯ СМЕСЬ (57) Реферат: Изобретение относится к составу гипсобетонной смеси и может найти применение в промышленности строительных материалов для изготовления плит и панелей. Технический результат повышение водостойкости. Гипсобетонная смесь содержит, мас.%: гипс 26,0-30,0, шамот с удельной 39,5-46,5, поверхностью 2500-4000 см 2/г полисилоксан 0,5-1,5; вода 17,0-30,0. 1 табл. R U 2 4 2 2 3 9 6 Адрес для переписки: 153000, г.Иваново, ул. Варенцовой, 17/1, кв.7, Ю.А. Щепочкиной Ñòð.: 1 ru C 1 C 1 (56) Список документов, цитированных в отчете о поиске: SU 1535858 A1, 15.11.1990. RU 2305667 C1, 10.09.2007. SU 1217837 A, 15.03.1986. RU 2335476 C1, 10.10.2008. DE 3832370 A, 09.11.1989. 2 4 2 2 3 9 6 Приоритет(ы): (22) Дата подачи заявки: 04.02.2010 (72) Автор(ы): Щепочкина ...

Шпаклевка

Использование: дл  внутренней и наружной отделки стеновых и потолочных панелей . Сущность изобретени : шпаклевка содержит известковое тесто 10 - 15%, лиг- носульфонат технический 10 - 14%, перлитовый песок 2 - 3%, молотый мел 12 - 15%, хлористый натрий 1 -2%, смолу древесную омыленную 10-15%, гипс 20 - 30%, золу- унос 2 - 3 %, воду остальное, Адгези  шпаклевки к бетону 0,5 МПа, жизнеспособность 7 сут.2 табл.

Method of gypsum article making

FIELD: building materials. SUBSTANCE: invention relates to the technology of building materials producing and can be used in production of gypsum low-roasting binding agents and articles on said. Method of producing gypsum articles involves preparing the raw mixture, pressing at simultaneous water slaking excess removal. The raw mixture is prepared by mixing the wetted gypsum dihydrate of the following groups: ball natural gypsum, citrogypsum with concentrated sulfuric acid followed by the successive addition of dry quick lime up to preparing the composition containing the following components, wt. -%: gypsum dihydrate, 50-70; H 2 SO 4 , 10-20; CaO 20-30; and slaking water, up to preparing the paste of normal viscosity. Slaking water is removed up to preparing water-binding ratio 0.3-0.35. Method eliminates stages of autoclave treatment and fine milling. EFFECT: increased strength of gypsum articles, simplified method, decreased energy consumption, improved ecology. Ос гс ПЧ Го РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) (51) МПК ВИ” 2 132 310. 13) Сл С 04 В 28/14 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 97112269/03, 16.07.1997 (46) Дата публикации: 27.06.1999 (56) Ссылки: ЗИ 1132485 А, 15.08.83. $Ц 1315411 А, 07.06.87. 5Ц 730643 А, 01.07.78. 4Р 60-55457А, 05.12.85. УР 48-41688, 07.12.13. (98) Адрес для переписки: 308012, Белгород, ул.Костюкова 36-89, Свергузовой Светлане Васильевне (71) Заявитель: Белгородский завод лимонной кислоты АО "Цитробел", Тарасова Галина Ивановна, Свергузова Светлана Васильевна, Бубнова Наталья Юрьевна, Козлов Виктор Павлович (72) Изобретатель: Тарасова Г.И., Свергузова С.В., Бубнова Н.Ю., Козлов В.П. , Наумов Е Г. (73) Патентообладатель: Белгородский завод лимонной кислоты АО "Цитробел", Тарасова Галина Ивановна, Свергузова Светлана Васильевна, Бубнова Наталья Юрьевна, Козлов Виктор Павлович (71) Заявитель (прод.): Наумов Евгений Григорьевич (73) Патентообладатель (прод.): Наумов Евгений ...

Method of producing phosphoric acid and calcium sulfate dihydrate

一种无砂型石膏基自流平砂浆及其制备方法

本发明公开了一种无砂型石膏基自流平砂浆，包括如下按重量份计的组分：β型脱硫建筑石膏：65‑75；石粉：25‑35；水泥：0‑4；保水增稠剂：0.05‑0.15；减水剂：0.15‑0.35；缓凝剂：0.04‑0.1；消泡剂：0.04‑0.08；粘结剂：0.04‑0.1；水：40‑50。其中β型脱硫建筑石膏为火力发电厂烟气脱硫石膏经煅烧制得，β型脱硫建筑石膏中的β型半水硫酸钙含量按质量百分比计不低于92％，β型脱硫建筑石膏的2h抗折强度不低于3.5MPa，标准稠度用水量不超过58％。石粉为采用石灰石制备机制砂过程中所收集，石粉的200目筛余小于按质量百分比计5％，20目筛余按质量百分比计为0。

Raw mix for manufacture of gypsum articles

FIELD: manufacture of building materials; manufacture of wall structural materials. SUBSTANCE: proposed raw mix contains ground technogenous calcium sulfate dehydrate at specific surface of 3000 cm 2 /g and 9000 cm 2 /g; saturated solution of slaked lime and additive - granulated polyvinyl alcohol. Components are contained at the following ratio, mass-%: gypsum at specific surface of 3000 cm 2 /g, 37.6-41.6; gypsum at specific surface of 9000 cm 2 /g, 46.4-50.4; polyvinyl alcohol, 0.167-0.5; saturated solution to the following content of components: slaked lime, 0.0135-0.019; the remainder being water. EFFECT: enhanced strength of finished articles. 3 ex ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß (19) RU (11) 2 318 769 (13) C1 (51) ÌÏÊ C04B 28/14 (2006.01) C04B 24/02 (2006.01) C04B 111/20 (2006.01) ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÎÏÈÑÀÍÈÅ ÈÇÎÁÐÅÒÅÍÈß Ê ÏÀÒÅÍÒÓ (21), (22) Çà âêà: 2006128143/03, 02.08.2006 (72) Àâòîð(û): Áåëîâ Âëàäèìèð Âëàäèìèðîâè÷ (RU), Ïåòðîïàâëîâñêà Âèêòîðè Áîðèñîâíà (RU), Ïóíåãîâ Ñòàíèñëàâ Âëàäèìèðîâè÷ (RU) (24) Äàòà íà÷àëà îòñ÷åòà ñðîêà äåéñòâè ïàòåíòà: 02.08.2006 (45) Îïóáëèêîâàíî: 10.03.2008 Áþë. ¹ 7 2 3 1 8 7 6 9 Ñîîòíîøåíèå êîìïîíåíòîâ ñëåäóþùåå, ìàñ.%: óêàçàííûé ãèïñ ñ óäåëüíîé ïîâåðõíîñòüþ 3000 ñì 2/ã - 37,6-41,6, óêàçàííûé ãèïñ ñ óäåëüíîé ïîâåðõíîñòüþ 9000 ñì 2/ã - 46,4-50,4, óêàçàííûé ïîëèâèíèëîâûé ñïèðò - 0,167-0,5, óêàçàííûé íàñûùåííûé ðàñòâîð äî ñîäåðæàíè : èçâåñòü ãàøåíà - 0,0135-0,019, âîäà - îñòàëüíîå. Òåõíè÷åñêèé ðåçóëüòàò - ïîâûøåíèå ïðî÷íîñòè ãîòîâûõ èçäåëèé. R U (57) Ðåôåðàò: Èçîáðåòåíèå îòíîñèòñ ê òåõíîëîãèè ïðîèçâîäñòâà ñòðîèòåëüíûõ ìàòåðèàëîâ è ìîæåò áûòü èñïîëüçîâàíî ïðè ïîëó÷åíèè ñòåíîâîãî êîíñòðóêöèîííîãî ìàòåðèàëà. Ñûðüåâà ñìåñü äë ïîëó÷åíè ãèïñîâûõ èçäåëèé ñîäåðæèò èçìåëü÷åííûé òåõíîãåííûé äâóâîäíûé ãèïñ ñ óäåëüíîé ïîâåðõíîñòüþ 3000 ñì 2/ã è 9000 ñì 2/ã, íàñûùåííûé ðàñòâîð ãàøåíîé èçâåñòè è äîáàâêó ãðàíóëèðîâàííûé ïîëèâèíèëîâûé ñïèðò. Ñòðàíèöà: 1 RU C 1 C 1 (54) ÑÛÐÜÅÂÀß ÑÌÅÑÜ ÄËß ...

PROCESS FOR MANUFACTURING ULTRA LOW CONSISTENCY α- AND β-BLEND STUCCO

알파 칼슘 설페이트 반수화물을 제조하는 슬러리 하소 단계와 그 이후에 베타 칼슘 설페이트 반수화물을 제조하는 유동층 하소 단계를 포함하는 알파- 및 베타-스터코의 블렌드를 제조하는 방법이 개시된다. 상기 방법은 50~75%의 석고 함유 고형분 슬러리로 개시되며, 그 이후에 증기가 상기 슬러리를 제1 반응기에서 하소하여 칼슘 설페이트 이수화물과 알파 칼슘 설페이트 반수화물을 함유하는 부분적으로 하소된 석고 슬러리를 형성한다. 이후 상기 부분적으로 하소된 슬러리는 탈수된다. 다음으로 여과 케이크는 케틀로 투입되어 상기 여과 케이크 물질의 칼슘 설페이트 이수화물이 베타 칼슘 설페이트 반수화물로 변환됨으로써 상기 하소 공정이 완료된다. Disclosed is a process for preparing a blend of alpha-and beta-starcho comprising a slurry calcination step to produce alpha calcium sulfate hemihydrate and a fluid bed calcination step to produce beta calcium sulfate hemihydrate thereafter. The process starts with a gypsum-containing solid slurry of 50-75%, after which the steam is calcined in a first reactor to form a partially calcined gypsum slurry containing calcium sulfate dihydrate and alpha calcium sulfate hemi-hydrate . The partially calcined slurry is then dehydrated. Next, the filtration cake is put into a kettle, and the calcium sulfate dihydrate of the filtration cake material is converted into beta- calcium sulfate hemi-hydrate, thereby completing the calcination process.

一种除甲醛环保装饰材料及其制备方法

本发明公开了一种除甲醛环保装饰材料及其制备方法，通过如下重量份的原料制备而成：硅藻土，20～30份；轻质碳酸钙，35～45份；聚丙烯酸酯，4～6份；二水合硫酸钙，30～40份；膨润土，1～3份；纳米二氧化钛，3～5份；二月桂酸二丁基锡，1～3份；聚丙烯纤维，4～6份；水，40～50份；硅酸钠和磷酸三钠共7～9份，硅酸钠和磷酸三钠的重量份之比为6～8:1。本发明提供的环保装饰材料具有优异的除甲醛效果，这种效果与原料中硅酸钠和磷酸三钠的重量份之比有关，硅酸钠和磷酸三钠的重量份之比为6～8:1时，除甲醛效果最好。

Method to produce cement clinker and plant to produce cement clinker

FIELD: construction. SUBSTANCE: plant comprises a cyclone heater (3, 3 a ), a prebaking reactor (4), a rotary furnace (1), a clinker cooler (5). According to the invention, fumes produced by the rotary furnace and heater gases are separated so that they are not mixed. Into the prebaking reactor gas is supplied with high content of oxygen, and some (8 a ) gases (8), leaving the cyclone heater (3, 3 a ), are recirculated into the prebaking reactor (4) and even into the cyclone heater (3, 3 a ), in order to produce the appropriate flow required to get suspended condition of raw materials in the heater. The other non-recirculated part (8 b ) of gases with high content of carbon dioxide is adapted, making it possible to limit CO 2 emissions into atmosphere, with the help of treatment, such as complexing. EFFECT: method improvement. 15 cl, 2 dwg, 2 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 498 182 (13) C2 (51) МПК F27D 17/00 (2006.01) F27B 7/20 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2011107735/02, 17.07.2009 (24) Дата начала отсчета срока действия патента: 17.07.2009 (72) Автор(ы): ЖОРЖЕ Серж (FR), ДЕВРЁ Себастьян (FR) (73) Патентообладатель(и): ФИВ ФСБ (FR) R U Приоритет(ы): (30) Конвенционный приоритет: 01.08.2008 FR 08/04407 (43) Дата публикации заявки: 10.09.2012 Бюл. № 25 2 4 9 8 1 8 2 (45) Опубликовано: 10.11.2013 Бюл. № 31 (56) Список документов, цитированных в отчете о поиске: ЕР 1923367 А, 21.05.2008. DE 3010909 A1, 01.10.1981. RU 2248946 C2, 27.03.2005. RU 2136622 C1, 10.09.1999. 2 4 9 8 1 8 2 R U (86) Заявка PCT: FR 2009/000884 (17.07.2009) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 01.03.2011 (87) Публикация заявки РСТ: WO 2010/012881 (04.02.2010) Адрес для переписки: 109012, Москва, ул. Ильинка, 5/2, ООО "Союзпатент" (54) СПОСОБ ПОЛУЧЕНИЯ ЦЕМЕНТНОГО КЛИНКЕРА И УСТАНОВКА ДЛЯ ПРОИЗВОДСТВА ЦЕМЕНТНОГО КЛИНКЕРА циклонного подогревателя (3, 3а), рециркулируют в ...

Сырьевая смесь для изготовления гипсобетона

ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß RU (19) (11) 2006 132 934 (13) A (51) ÌÏÊ C04B 28/14 (2006.01) C04B 14/16 (2006.01) C04B 111/20 (2006.01) ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÇÀßÂÊÀ ÍÀ ÈÇÎÁÐÅÒÅÍÈÅ (21), (22) Çà âêà: 2006132934/03, 13.09.2006 (43) Äàòà ïóáëèêàöèè çà âêè: 20.03.2008 Áþë. ¹ 8 (72) Àâòîð(û): Õåæåâ Òîë Àìèðîâè÷ (RU), Õåæåâ Õàñàíáè Àíàòîëüåâè÷ (RU) (57) Ôîðìóëà èçîáðåòåíè Ñûðüåâà ñìåñü äë èçãîòîâëåíè ãèïñîáåòîíà, âêëþ÷àþùà ãèïñîâîå â æóùåå, çàïîëíèòåëü, äîáàâêó è âîäó, îòëè÷àþùà ñ òåì, ÷òî îíà ñîäåðæèò â êà÷åñòâå çàïîëíèòåë îòõîäû ïèëåíè âóëêàíè÷åñêîãî òóôà, à â êà÷åñòâå äîáàâêè - íåãàøåíóþ èçâåñòü ïðè ñëåäóþùåì ñîîòíîøåíèè êîìïîíåíòîâ, ìàñ.%: Ãèïñîâîå â æóùåå 30,5-31,7 Òóôîâûé ïåñîê 30,5-31,7 Âîäà R U A Ñòðàíèöà: 1 RU 7,9-10,6 Îñòàëüíîå 2 0 0 6 1 3 2 9 3 4 A Íåãàøåíà èçâåñòü 2 0 0 6 1 3 2 9 3 4 (54) ÑÛÐÜÅÂÀß ÑÌÅÑÜ ÄËß ÈÇÃÎÒÎÂËÅÍÈß ÃÈÏÑÎÁÅÒÎÍÀ R U Àäðåñ äë ïåðåïèñêè: 360004, ÊÁÐ, ã.Íàëü÷èê, óë. ×åðíûøåâñêîãî, 173, ÊÁÃÓ, ïàòåíòîâåäó (71) Çà âèòåëü(è): Ãîñóäàðñòâåííîå îáðàçîâàòåëüíîå ó÷ðåæäåíèå âûñøåãî ïðîôåññèîíàëüíîãî îáðàçîâàíè Êàáàðäèíî-Áàëêàðñêèé ãîñóäàðñòâåííûé óíèâåðñèòåò èì. Õ.Ì. Áåðáåêîâà (RU)

칼슘 설페이트 반수화물 처리 공정

본 발명은 베타 칼슘 설페이트 반수화물(beta calcium sulfate hemihydrate)을 처리하는 공정에 관한 것이다. 상기 공정은 베타 칼슘 설페이트 반수화물을 대기압 이상의 압력에서 스팀에 노출시키는 단계를 포함한다. 석고, 베타 칼슘 설페이트, 반수화물, 물 요구량

Stock for manufacturing heat insulating slabs for ceilings and partitions

Использование: в промышленности строительных материалов. Сущность: сырьева  смесь дл  изготовлений теплоизол ционных плит перегородок и гготолков содержит, мае %: полуводный гипс 42-46;пробка фракции 10-30 мм 30,3-37,35; алифатическа  эпоксидна  смола 0,5-0,7; полиэтиленполиа- мин 0,05-0,07; катапин-бактерицид 0,1-0,3; вода остальное. Сырьевую смесь готов т смешением гипса, пробки с водой затворени , в которую ввод т предварительно вышеуказанные добавки. Водопоглощение 27%, коэффициент теплопроводности 0,07 Вт/м &amp;deg;С, средн   плотность 330 кг/м3.1 табл. Usage: in the building materials industry. Essence: the raw mix for the manufacture of heat insulating partitions and hot plates contains, in May,%: semi-aquatic gypsum 42-46; plug of a fraction of 10-30 mm 30.3-37.35; aliphatic epoxy resin 0.5-0.7; polyethylene polyamine 0.05-0.07; catapin bactericide 0.1-0.3; water the rest. The raw mix is prepared by mixing gypsum, a stopper with mixing water, into which the previously mentioned additives are introduced. The water absorption is 27%, the thermal conductivity coefficient is 0.07 W / m &amp; C, the average density is 330 kg / m3.1 tab.

Сырьевая смесь для изготовления гипсобетона

Изобретение относится к промышленности строительных материалов и может быть использовано при производстве изделий из гипсобетона. Сырьевая смесь для изготовления гипсобетона содержит, мас.%: гипсовое вяжущее - 30,5-31,7, отходы пиления вулканического туфа - туфовый песок 30,5-31,7, негашеная известь - 7,9-10,6, вода - остальное. Технический результат - уменьшение удельного расхода гипса без снижения прочности, замедление сроков схватывания. 2 табл. ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß RU (19) (11) 2 330 823 (13) C2 (51) ÌÏÊ C04B 28/14 (2006.01) C04B 14/16 (2006.01) C04B 111/20 (2006.01) ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÎÏÈÑÀÍÈÅ ÈÇÎÁÐÅÒÅÍÈß Ê ÏÀÒÅÍÒÓ (21), (22) Çà âêà: 2006132934/03, 13.09.2006 (72) Àâòîð(û): Õåæåâ Òîë Àìèðîâè÷ (RU), Õåæåâ Õàñàíáè Àíàòîëüåâè÷ (RU) (24) Äàòà íà÷àëà îòñ÷åòà ñðîêà äåéñòâè ïàòåíòà: 13.09.2006 (43) Äàòà ïóáëèêàöèè çà âêè: 20.03.2008 2 3 3 0 8 2 3 (56) Ñïèñîê äîêóìåíòîâ, öèòèðîâàííûõ â îò÷åòå î ïîèñêå: Âîëæåíñêèé À.Â. è äð. Ãèïñîâûå â æóùèå è èçäåëè . - Ì.: Ñòðîéèçäàò, 1974, ñ.91, 105107. SU 1544756 A1, 23.02.1990. RU 2108308 C1, 10.04.1998. SU 1087483 A, 23.04.1984. SU 1673557 A1, 30.08.1991. US 4540429 A, 10.09.1985. R U (45) Îïóáëèêîâàíî: 10.08.2008 Áþë. ¹ 22 (73) Ïàòåíòîîáëàäàòåëü(è): Ãîñóäàðñòâåííîå îáðàçîâàòåëüíîå ó÷ðåæäåíèå âûñøåãî ïðîôåññèîíàëüíîãî îáðàçîâàíè Êàáàðäèíî-Áàëêàðñêèé ãîñóäàðñòâåííûé óíèâåðñèòåò èì. Õ.Ì. Áåðáåêîâà (RU) Àäðåñ äë ïåðåïèñêè: 360004, ÊÁÐ, ã.Íàëü÷èê, óë. ×åðíûøåâñêîãî, 173, ÊÁÃÓ, ïàòåíòîâåäó 2 3 3 0 8 2 3 30,5-31,7, îòõîäû ïèëåíè âóëêàíè÷åñêîãî òóôà òóôîâûé ïåñîê 30,5-31,7, íåãàøåíà èçâåñòü - 7,910,6, âîäà - îñòàëüíîå. Òåõíè÷åñêèé ðåçóëüòàò óìåíüøåíèå óäåëüíîãî ðàñõîäà ãèïñà áåç ñíèæåíè ïðî÷íîñòè, çàìåäëåíèå ñðîêîâ ñõâàòûâàíè . 2 òàáë. R U (57) Ðåôåðàò: Èçîáðåòåíèå îòíîñèòñ ê ïðîìûøëåííîñòè ñòðîèòåëüíûõ ìàòåðèàëîâ è ìîæåò áûòü èñïîëüçîâàíî ïðè ïðîèçâîäñòâå èçäåëèé èç ãèïñîáåòîíà. Ñûðüåâà ñìåñü äë èçãîòîâëåíè ãèïñîáåòîíà ñîäåðæèò, ìàñ.%: ãèïñîâîå â æóùåå - Ñòðàíèöà: 1 RU C ...

一种转晶剂以及使用其制备α型高强石膏的用途

提供一种转晶剂，其为具有式(I)结构的化合物、具有式(I)结构的化合物的盐和具有式(II)结构的化合物中的任意1种或至少2种的组合，其中，R 1 、R 2 、R 3 、R 4 、R 5 、R 6 、R 7 和R 8 均各自独立地选自有机基团；R’为甲基；n为0或1。该转晶剂在水中具有像钳子一样的两个羧酸基团，其能够在α‑CaSO 4 ·0.5H 2 O晶体的(114)面上产生强烈的吸附作用。由该转晶剂制备的α型高强石膏的晶体长径比在1:0.5～1:3范围内，其具有5.0MPa以上的2小时抗折强度，43MPa以上的烘干抗压强度。

Гипсовое вяжущее

Изобретение относится к строительным материалам, а именно к гипсовым вяжущим, применяемым при изготовлении строительных конструкций и деталей. Задача изобретения - повышение водостойкости и прочности строительных конструкций и изделий, а также удешевление изделий за счет утилизации отходов металлообработки. Это достигается тем, что гипсовое вяжущее, включающее гипс и добавку, содержит в качестве добавки отход металлообработки - органоминеральный шлам (маслошлам) - при следующем соотношении компонентов, мас. %: гипс 99,8 - 99,5; органо-минеральный шлам (маслошлам) 0,5 - 0,2. 2 табл. ЭРУ 0сС ПЧ Го РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) (51) МПК ВИ “” 2 074 136 ' 13) СЛ С 04 В 11/00/С 04 В 111:20 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 92003020/33, 26.10.1992 (46) Дата публикации: 27.02.1997 (56) Ссылки: 1. Вяжущие гипсовые. Технические условия. ГОСТ 125-19 СТ.СЭВ 826-71 в части технических требований. 2. Авторское свидетельство СССР М 1502511, кл. С 04 В 11/00, 1990. (71) Заявитель: Самарская государственная архитектурно-строительная академия (72) Изобретатель: Коренькова С.Ф., Федоров В.П., Клюев А.Д. (73) Патентообладатель: Самарская государственная архитектурно-строительная академия (54) ГПСОВОЕ ВЯЖУЩЕЕ (57) Реферат: Изобретение относится к строительным материалам, а именно к гипсовым вяжущим, применяемым при изготовлении строительных конструкций и деталей. Задача изобретения - повышение водостойкости и прочности строительных конструкций и изделий, а также удешевление изделий за счет утилизации отходов металлообработки. Это достигается тем, что гипсовое вяжущее, включающее гипс и добавку, содержит в качестве добавки отход металлообработки - органоминеральный шлам (маслошлам) - при следующем соотношении компонентов, мас. %: гипс 99,8 - 99,5; органо-минеральный шлам (маслошлам) 0,5 - 0,2. 2 табл. 2074136 С1 КО ЭРУ 0сС ПЧ Го КУЗЗАМ АСЕМСУ ГОК РАТЕМТ$ АМО ТКАОЕМАКК$ (19) 13) ВИ 2 074 136 ^^ Сл о © 04 В 11/00/С 04 В ...

Raw mixture for producing plugging binder by geothermal method

Изобретение относитс  к креплению нефт ных и газовых скважин.Цель изобретени  - повышение прочности цементного камн  за счет повышени  стабильности сьфьевой смеси. Смесь содержит компоненты при их следующем соотношении, мас.%: отход производства фосфорной кислоты - дигидрат фос- фогипса 92,07-98,47;, регул тор кристаллизации 0,02-0,40; добавку - негашеную известь 0,5-0,3; отход производства фтористого алюмини  1,0-5,0. Готов т водную суспензию фосфогипса, известкового молока, отхода фтористого алюмини  и в качестве регул тора кристаллизации берут малеиновую кислоту,фталиевый ангидрид и др. Далее смесь подают в автоклав - реактор дл  гидротермальной обработки при 120-130 С и давлении 2-3 кг/см . Полученную в автоклаве водную суспензию фильтруют на вакуум-фильтре, сушат , измельчают и смешивают с 20% портландцемента. 1 табл. (Л со 4 О 05 The invention relates to the fastening of oil and gas wells. The purpose of the invention is to increase the strength of cement stone by increasing the stability of the mixture. The mixture contains components at their following ratio, wt.%: Phosphoric acid production waste — phosphorus gypsum dihydrate 92.07-98.47 ;, crystallization regulator 0.02-0.40; additive - quick lime 0.5-0.3; waste production of aluminum fluoride 1.0-5.0. An aqueous suspension of phosphogypsum, milk of lime, aluminum fluoride waste is prepared and maleic acid, phthalic anhydride, etc. are taken as crystallization regulator. Next, the mixture is fed to an autoclave – reactor for hydrothermal treatment at 120–130 ° C and a pressure of 2-3 kg / cm . The aqueous suspension obtained in the autoclave is filtered on a vacuum filter, dried, crushed and mixed with 20% Portland cement. 1 tab. (L co 4 O 05

Способ получения гипсоцементно-пуццоланового вяжущего

1. Способ получения гипсоцементно-пуццоланового вяжущего, включающий два этапа, на первом этапе осуществляют гидроактивацию цемента в присутствии поверхностно-активных веществ (ПАВ), карбоната щелочного металла и воды в течение 2-8 мин, на втором этапе в полученную смесь добавляют полуводный гипс и отработанный силикагель, отход газовой промышленности, предварительно измельченный до удельной поверхности не менее 6000 см2/г, и перемешивают до получения однородной массы при следующем соотношении компонентов, мас.% ! цемент6-22полуводный гипс40-66ПАВ0,05-0,25карбонат щелочного металла0,05-0,25отработанный силикагель4-10водаостальное ! 2. Способ по п.1, отличающийся тем, что гидроактивацию осуществляют в активаторе со скоростью вращения вала не менее 3000 об/мин. ! 3. Способ по п.1, отличающийся тем, что в качестве ПАВ применяют лигносульфонат технический (ЛСТ). ! 4. Способ по п.1, отличающийся тем, что в качестве ПАВ применяют суперпластификатор С-3. ! 5. Способ по п.1, отличающийся тем, что в качестве карбоната щелочного металла применяют карбонат натрия. ! 6. Способ по п.1, отличающийся тем, что в качестве карбоната щелочного металла применяют карбонат калия. (19) РОССИЙСКАЯ ФЕДЕРАЦИЯ RU (11) 2007 141 113 (13) A (51) МПК C04B 7/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21), (22) Заявка: 2007141113/03, 06.11.2007 R U (57) Формула изобретения 1. Способ получения гипсоцементно-пуццоланового вяжущего, включающий два этапа, на первом этапе осуществляют гидроактивацию цемента в присутствии поверхностно-активных веществ (ПАВ), карбоната щелочного металла и воды в течение 2-8 мин, на втором этапе в полученную смесь добавляют полуводный гипс и отработанный силикагель, отход газовой промышленности, предварительно измельченный до удельной поверхности не менее 6000 см 2/г, и перемешивают до получения однородной массы при следующем соотношении компонентов, мас.% цемент 6-22 полуводный гипс 0,05-0,25 ...

A method of forming a gypsum based product

본 발명은 석고계 제품을 형성하는 방법에 관한 것이다. 상기 방법은 용기 내에서 상승된 온도 및 압력 조건하에 물과 석고의 혼합물을 하소시켜 그 안에 알파-반수화물 슬러리를 생성시키는 단계; 및 알파-반수화물 슬러리를 용기로부터 혼합기로 통과시켜 추가의 물과 혼합시킴으로써 경화성 슬러리를 생성시키고, 이를 정렬하여 경화시킴으로써 석고계 제품을 형성하는 단계를 포함한다. The present invention relates to a method for forming gypsum-based products. The method includes calcining a mixture of water and gypsum under elevated temperature and pressure conditions in a vessel to produce an alpha-hemihydrate slurry therein; And passing the alpha-hemihydrate slurry from the vessel through a mixer to mix with additional water to produce a curable slurry, which is then aligned and cured to form a gypsum-based product.

Process for manufacture of gypsum binder

FIELD: constructional materials industry. SUBSTANCE: process for manufacture of gypsum binder includes such steps as crushing, dehydration of gypsum dihydrate and grinding. Disclosed process prescribes crushing gypsum dihydrate to fraction of 10 to 500 mm and dehydrating it in superhigh-frequency electromagnetic field at 0.5 to 50 kW during 10 to 60 min to produce gypsum binder which contains 70 to 90 mass percent calcium sulfate alpha-polyhydrate and 10 to 30 mass percent calcium sulfate beta-polyhydrate. Brand strength of thus manufactured binder is 70 kg/sq. cm. EFFECT: higher quality. 1 tbl 669$ с 0с ПЧ Го (19) РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ ВИ ”” 2 023 699 ' 59 М С 04 В 11/02 13) СЛ 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 4904201/33, 26.11.1990 (46) Дата публикации: 30.11.1994 (56) Ссылки: 1. Мак И.Л. и др. Производство гипса и гипсовых изделий. М.:Стройиздат, 1961, с.10 - 15.2. Заявка ФРГ М 2350066, кл. С 04В 11/02, 1975. (71) Заявитель: Уральский научно-исследовательский и проектный институт строительных материалов (72) Изобретатель: Бобков Е_А., Ромашков А.В., Шверцер БА. (73) Патентообладатель: Уральский научно-исспедовательский и проектный институт строительных материалов, Бобков Евгений Александрович, Ромашков Александр Владимирович, Шверцер Борис Анатольевич (54) СПОСОБ ИЗГОТОВЛЕНИЯ ГИПСОВОГО ВЯЖУЩЕГО (57) Реферат: Используется в — промышленности строительных материалов. Способ изготовления гипсового вяжущего, включающий дробление, дегидратацию двуводного гипса и помол, предусматривает дробление двуводного гипса до фракции 10 - 500 мм и проведение дегидратации в электромагнитном поле сверхвысокой частоты мощностью 0,5 - 50 кВт в течение 10 - 60 мин до получения гипсового вяжущего, содержащего, мас. %:; альфа-полугидрат сульфата кальция 70 - 90; бетта-полугидрат сульфата кальция 10 - 30. Марочная прочность получаемого вяжущего 70 кисм 2. 1 табл. 2023699 С1 КО 669$ с 0с ПЧ Го КУЗЗАМ АСЕМСУ ГОК РАТЕМТ$ ...

Raw mixture for manufacturing heat-insulating gas concrete

FIELD: construction. ^ SUBSTANCE: raw mixture intended for manufacturing heat-insulating gas concrete includes, parts by weight: burnt and ground lime 86-88, gypsum 2.7-2.76, aluminium powder 0.65-0.67, powdered scrap silica brick sieved through sieve No. 0.63 270-276, water 90-92. ^ EFFECT: decreasing lime consumption. ^ 1 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 385 306 (13) C1 (51) МПК C04B 38/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ На основании пункта 1 статьи 1366 части четвертой Гражданского кодекса Российской Федерации патентообладатель обязуется заключить договор об отчуждении патента на условиях, соответствующих установившейся практике, с любым гражданином Российской Федерации или российским юридическим лицом, кто первым изъявил такое желание и уведомил об этом патентообладателя и федеральный орган исполнительной власти по интеллектуальной собственности. (24) Дата начала отсчета срока действия патента: 13.03.2009 C 1 2 3 8 5 3 0 6 R U C 1 (56) Список документов, цитированных в отчете о поиске: КИТАЙЦЕВ В.А. Справочник по производству теплоизоляционных и акустических материалов. - М.: Издательство литературы по строительству, 1964, с.347348, 355-356, 358. SU 1730082 А1, 30.04.1992. RU 2051882 С1, 10.01.1996. SU 1726436 А1, 15.04.1992. JP 10036181 А, 10.02.1998. BE 807740 А, 15.03.1974. СУХАРЕВ М.Ф. и др. Производство теплоизоляционных материалов. - М.: Высшая школа, 1981, с.213216. Адрес для переписки: 153000, г.Иваново, ул. Варенцовой, 17/1, кв.7, Ю.А. Щепочкиной (54) СЫРЬЕВАЯ СМЕСЬ ДЛЯ ИЗГОТОВЛЕНИЯ ТЕПЛОИЗОЛЯЦИОННОГО ГАЗОБЕТОНА (57) Реферат: Изобретение относится к промышленности строительных материалов, в частности к производству ячеистых бетонов. Сырьевая смесь для изготовления теплоизоляционного газобетона содержит, вес.ч.: молотая негашеная известь 86-88, гипс 2,7-2,76, алюминиевая пудра 0,65-0,67, молотый и просеянный через сито №0,63 бой силикатного кирпича 270- ...