Process for slag foaming a non-stainless steel melt in an electric arc furnace

During the production of non-stainless steel, slag containing a high proportion of metal oxides, primarily iron oxide, is formed during the smelting of the solid material in the electric arc furnace. The concentration of the iron oxide often reaches values of more than 20%. This slag has a poor foaming capability and does not permit the typical characteristics of a carbon steel slag to be achieved. In order to cause such a slag to foam, according to the invention it is proposed to load the electric arc furnace with pellets or briquettes ( 8 ) which consist of a defined mixture of an iron oxide carrier and an iron carrier as ballast material, of carbon as reducing agent and also of a binder material, which react in the electric arc furnace in a reducing manner, floating under the slag ( 7 ) in the steel melt ( 6 ). The reaction gases ( 12 ) produced in this way consist primarily of carbon monoxide and advantageously support the foaming of the slag.

METHOD TO CONTROL SLAG FOAMING IN A SMELTING PROCESS

A method to control slag foaming in a smelting process in a vessel for smelting an iron-containing feed material including the steps of: 1. A method to control slag foaming in a smelting process in a vessel for smelting an iron-containing feed material comprising the steps of:measuring vibration of the metallurgical vessel with an accelerometer at one or more positions on the vessel to obtain accelerometer data,comparing values derived from the accelerometer data with a threshold value which indicates the onset of a slag foaming incident, andadjusting the smelting process if the value derived from the accelerometer data passes a predefined alarm value,wherein the smelting process is adjusted by adjusting the amounts of the gaseous and/or the solid components injected in the smelting process.2. The method according to claim 1 , wherein said adjusting the smelting process comprises adjusting the amount of oxygen injected in the smelting process.3. The method according to claim 1 , wherein said adjusting step comprises adjusting the amount of coal injected in the smelting process.4. The method according to claim 1 , wherein said adjusting step comprises adjusting the amount of iron-containing feed material injected in the smelting process.5. The method according to claim 1 , wherein said adjusting step comprises adjusting the amount of lime injected in the smelting process.6. The method according to claim 1 , wherein the basicity of the slag is monitored and the amount of lime injected in the smelting process is adjusted to keep the basicity of the slag in a predefined range or restore the basicity of the slag to within the predefined range.7. The method according to claim 2 , wherein the adjusting step comprises adjusting the amounts of gaseous and solid components by reducing the amounts of gaseous and solid components when the value derived from the accelerometer data is in the alarm range.8. The method according to claim 7 , wherein the method further comprises ...

PROCESS AND SYSTEM FOR ELIMINATING THE POTENTIAL FOR LD AND EAF STEEL SLAG EXPANSION

The present invention relates to a process and to a system for eliminating the expandability of steel-plant slag, which comprises a primary crusher () to reduce the fragments according to their granulometry; a magnetic separator () to remove metallic fragments bigger than a determined granulometry (); a rotary dryer () to dry slag free from bigger metallic fragments; an impact mill () to disaggregate and fragment slag particles that are bigger than a predetermined granulometry; a classifier () for aero-classification and drag of fine and superfine particles; a cooler () for cooling slag particles bigger than a predetermined granulometry by means of heat exchange and removal of the fine and superfine particles that were not collected by the impact mill (); a vibrating sieve () provided with two or more decks ( and ) with screens of predetermined sizes; low-intensity magnetic separators ( and ), with generation of non-magnetic slag fractions free from metallic iron and from iron monoxide, and of magnetic fractions composed by metallic iron and iron monoxide; and low-intensity magnetic separators ( and ) to reprocess the magnetic fractions with generation of concentrate with high metallic iron contents and a product with high concentration of iron monoxide. 1. A process for eliminating the expandability of steel-plant slag , characterized by comprising the steps of:{'b': '1', 'claim-text': [{'b': '3', 'b) feeding a primary crusher () to reduce the fragments depending on their gain size, which takes place by virtue of the natural moisture of the slag;'}, {'b': 3', '4', '5, 'c) collecting the material processed by the primary crusher () and transporting it to a magnetic separator (), in which metallic fragments bigger than a determined grain size () are removed;'}, {'b': 5', '6, 'd) drying the slag free from bigger metallic fragments () in a rotary dryer ();'}, {'b': 10', '11, 'e) feeding the dry slag () to an impact mill () that discharges and fragments bigger slag up ...

Process for making a foaming slag on a stainless steel melt in an electric furnace

METHOD FOR MANUFACTURING MOLTEN IRON WITH ELECTRIC ARC FURNACE

A method for manufacturing molten iron by melting a cold iron source in an electric arc furnace having a carbonaceous material-injecting device. The method includes, in the carbonaceous material-injecting device, while a carbonaceous material is injected with a carrier gas through a central portion of the carbonaceous material-injecting device, injecting a fuel and a combustion-supporting gas through respective outer peripheral portions of the carbonaceous material-injecting device. The carbonaceous material injected through the central portion passes through a cylindrical combustion flame generated by a combustion reaction between the fuel and the combustion-supporting gas and is injected into molten slag and molten iron. 1. A method for manufacturing molten iron with an electric arc furnace , in which a cold iron source is melted to manufacture molten iron , the electric arc furnace having a carbonaceous material-injecting device , the method comprising:in the carbonaceous material-injecting device, while a carbonaceous material is injected with a carrier gas through a central portion of the carbonaceous material-injecting device, injecting a fuel and a combustion-supporting gas through respective outer peripheral portions of the carbonaceous material-injecting device,wherein the carbonaceous material injected through the central portion passes through a cylindrical combustion flame generated by a combustion reaction between the fuel and the combustion-supporting gas and is injected into molten slag and molten iron.2. The method for manufacturing molten iron with an electric arc furnace according to claim 1 , wherein injection flow velocities of the fuel and the combustion-supporting gas in the carbonaceous material-injecting device are higher than an injection flow velocity of the carrier gas of the carbonaceous material in the carbonaceous material-injecting device.3. The method for manufacturing molten iron with an electric arc furnace according to claim 1 , ...

Fuel and oxygen addition for metal smelting or refining process

A furnace 10 for smelting iron ore and/or refining molten iron 20 is equipped with an overhead pneumatic lance 40, through which a center stream of particulate coal 53 is ejected at high velocity into a slag layer 30. An annular stream of nitrogen or argon 51 enshrouds the coal stream. Oxygen 52 is simultaneously ejected in an annular stream encircling the inert gas stream 51. The interposition of the inert gas stream between the coal and oxygen streams prevents the volatile matter in the coal from combusting before it reaches the slag layer. Heat of combustion is thus more efficiently delivered to the slag, where it is needed to sustain the desired reactions occurring there. A second stream of lower velocity oxygen can be delivered through an outermost annulus 84 to react with carbon monoxide gas rising from slag layer 30, thereby adding still more heat to the furnace.

Apparatus for electric steelmaking

A burner/injector for providing a localized impingement flame or multiple flames for scrap heating and melting through use of a fluid fuel and at least one oxygen rich oxidizing gas. The burner/injector includes a liquid-cooled combustor for generating an impinging flame directed toward a scrap pile and a structure for injecting a controllable amount of a solid carbonaceous fuel and a controllable flow of high velocity oxidizing gas into space that has been previously occupied by the impinging flame. The burner/injector may be equipped to inject a solid slag forming materials and/or slag deoxidizing materials, and/or to inject an additional oxidizing gas for burning a small portion of preheated scrap, post-combustion of CO and iron-carbon melt refining. The burner/injector may be arranged as a simple liquid-cooled combustor permanently mounted through the furnace wall or roof, and may be equipped with single or multiple channels for injection of solid material and high velocity oxidizing gas. Separate injecting lances for high velocity oxidizing gas and/or solid carbonaceous fuel may be mounted on the furnace. Both the lances and the combustors may be equipped with a nozzles for additional injection of the additional oxidizing gas.

Materials for depressing slag foaming including waste sodium bicarbonate, manufacturing method thereof and method for killing slag using the same

The present invention relates to a slag calming material for a converter including waste sodium bicarbonate, a manufacturing method thereof, and a slag calming method using the same. According to the present invention, with respect to 100 parts by weight of waste sodium bicarbonate generated in a desulfurization process of sintering flue gas, the slag calming material for a converter comprises: 20-50 parts by weight of ironmaking byproducts comprising at least any one of coke sludge, quicklime sludge, and converter slag; and 3-8 parts by weight of a binder. Generally, waste sodium bicarbonate mainly depending on burying is recycled to contribute to an environment and efficiently calm the slag while discharging iron.

Process for using slag in stainless steel production in the electric arc furnace

-조성물내에 1 종 이상의 금속 산화물 및 탄소를 함유하는 분말을 슬래그내에 도입하고, -분말내에 존재하는 1 종 이상의 산화물을 탄소와의 반응에 의해 환원되어 슬래그내에 기포를 형성하며, 슬래그내에 존재하는 상기 기포가 안정한 발포물 형태의 슬래그를 만드는 것을 특징으로 하는, 전기로에 용융된 스테인레스 강 상의 발포 슬래그의 제조 공정. A powder containing at least one metal oxide and carbon in the composition is introduced into the slag, and at least one oxide present in the powder is reduced by reaction with carbon to form bubbles in the slag, and the above-mentioned present in the slag A process for producing foamed slag on stainless steel melted in an electric furnace, characterized in that the foam makes slag in the form of a stable foam.

A kind of method of red mud production converter slagging agent

本发明公开了一种利用赤泥生产转炉化渣剂的方法，涉及冶金炉料领域，其特征在于，该方法包括以下步骤：将低品位赤泥进行磁选，得到磁选赤泥，按质量份计，向1份磁选赤泥中加入1～3份铝矾土并混合均匀，得到反应原料；向所述反应原料中加入质量百分比为4～6％的水玻璃和0.5～1％的偏硅酸钠，放入混料机内混合10～20min后送至高强度压球机成型，再放入温度为260～320℃的干燥窑干燥至水分低于5％后，得到转炉化渣剂，以质量份数计，该转炉化渣剂包括以下成分：40～55份Al 2 O 3 、10～20份Fe 2 O 3 、10～20份SiO 2 和0～4份H 2 O，本发明能够有效利用低品位的赤泥，进一步降低赤泥对环境的污染。

Method of producing steel and hydraulically active binders from slags

FIELD: ferrous metallurgy. SUBSTANCE: method includes refining of pig iron with slag containing above 5% of iron oxides. Slag is reduced in the course of refining into clinker phase, separated from molten metal, discharged and cooled. Slag is used in the form of steel melting slag or Cu-converter slags after reaction with head bath, or oxidized slags from plants for incineration of wastes. EFFECT: provision of treatment of slag directly at steel plants and its conversion into hydraulically active binders. 14 cl, 5 tbl 9 СсЬс ПЧ Го (19) РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ ВИ "” 2 127 765. (51) МПК 13) Сл С 21С 5/28, 5/36//С 21 В 3/06, С 04В 5/06, 7/147 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 95112569/02, 24.08.1994 (30) Приоритет: 07.09.1993 АТ А 1802/93 01.07.1994 АТ А 1309/94 (46) Дата публикации: 20.03.1999 (56) Ссылки: СВ 2027058 А, 13.02.80. ЗИ 922157 А, 23.04.82. ЗЦ 918312 А, 09.04.82. ЗЦ 1463782 АЛ, 07.03.89. ЗЦ 1735408 АЛ, 23.05.92. $4 57834ТА, 31.10.77. ЗИ 1708864 АЛ, 30.01.92. 1$ 4102675 А, 25.07.18. 9$ 4009024 А, 22.02.77. СВ 2199025 А, 29.06.88. ОЕ 2611889 А, 22.09.77. 1 Т1ТЛЪА, 31.12.76. За ипа езеп, м, 104, по 16., 13.08.84 Виззеаой ОЕ, раде$ 774-778, РКВЕТ ЕТ А|. "Мегметипа, уоп [О - ЗсТаскКе гуг Егхеиаиупа уоп РоШапахгетептКИпкКег ипа Коресзеп" (85) Дата перевода заявки РСТ на национальную фазу: 17.06.95 (86) Заявка РСТ: АТ 94100122 (24.08.94) (87) Публикация РСТ: М/О 95/07365 (16.03.95) (98) Адрес для переписки: 103735, Москва, ул.Ильинка, 5/2, Союзпатент, патентному поверенному Дудушкину С.В. (71) Заявитель: "Хольдербанк" Финансьер Гларус АГ (СН) (72) Изобретатель: Альфред Эдлингер (АТ) (73) Патентообладатель: "Хольдербанк" Финансьер Гларус АГ (СН) (54) СПОСОБ ПОЛУЧЕНИЯ СТАЛИ И ГИДРАВЛИЧЕСКИ АКТИВНЫХ СВЯЗУЮЩИХ ИЗ ШЛАКОВ (57) Реферат: Изобретение относится к черной металлургии, конкретнее к способам получения стали и гидравлически активных связующих. В способе получения стали и гидравлически активных ...

Removing method of inclusion in continuous casting

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Metal melt production apparatus and method (versions)

Изобретение предназначено для приготовления расплавов металла с использованием всех известных в металлургической практике носителей металла в их самых разных количественных составах. Установка для получения расплавов металла содержит сосуд-металлоприемник электродуговой печи с завалочным отверстием для расплава металла, и/или скрапа, и/или металла (например, железа) прямого восстановления по меньшей мере одним электродом и устройством для выпуска шлака и кислородный конвертерный сосуд с устройством для выпуска расплава. Кислородный конвертерный сосуд вместе с сосудом-металлоприемником электродуговой печи образуют соединенный сливным устройством единый блок, неподвижно установленный на фундаменте, причем удельная поверхность ванны, отнесенная к объему ванны, в конвертерном сосуде меньше, чем в сосуде-металлоприемнике. Кислородный конвертерный сосуд и сосуд-металлоприемник электродуговой печи имеют общую реакционную зону, расположенную над зеркалом ванны этих сосудов. В сосуде-металлоприемнике получают предварительный расплав, доводят до определенного уровня температуры и химического состава. Затем направляют в конвертерный сосуд, непрерывно рафинируют, предпочтительно до получения сырой стали, при этом шлак, образующийся в конвертерном сосуде в противотоке к металлу, направляют в сосуд-металлоприемник, из которого затем удаляют. Технический результат заключается в экономии электроэнергии, повышении производительности и эффективности обезуглероживания при снижении расхода восстановителя, шлакообразующих добавок и источников энергии. 3 с. и 39 з.п. ф-лы, 10 ил., 13 табл. 8148 %0сс ПЧ сэ (19) РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ ВИ "” 2 205 878. (51) МПК? 13) С2 С 21С 5/52 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 99105748102, 26.06.1998 (24) Дата начала действия патента: 26.06.1998 (30) Приоритет: 27.06.1997 АТ А11О9/97 (43) Дата публикации заявки: 20.01.2001 (46) Дата публикации: 10.06.2003 (56) Ссылки: АТ 295566 В, 15.05 ...

Method for recrement foaming in steel manufacturing by using calcium nitrate

FIELD: metallurgy. SUBSTANCE: method for foaming of recrements in steel manufacturing includes addition of calcium nitrate to recrements separately or in combination with carbon, which may be injected separately or in mixture with gases such as air, nitrogen, carbon dioxide or inert gases. Solid components are injected separately or through single jet or in form of premelted grains. Ratio between calcium nitrate and carbon is 4:1-2:1. Method for recrement foaming in stainless steel manufacturing in steel-making furnace includes insertion or injection of calcium nitrate and carbon in gas flow mentioned above after addition of FeSi, Al or Mg to recrement. EFFECT: recrement foaming with improved effectiveness, in particular in stainless steel manufacturing, and prevention of problem arisen when known foaming agent are used. 8 cl, 1 ex ЭУОТУСС ПЧ сэ (19) РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ ВИ "” 2 241 046. (51) МПК? 13) С2 С 21С 5/52, 5/28, 7/00 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 2002113094102, 18.10.2000 (24) Дата начала действия патента: 18.10.2000 (30) Приоритет: 18.10.1999 МО 1999 5072 (43) Дата публикации заявки: 10.11.2003 (45) Дата публикации: 27.11.2004 (56) Ссылки: УР 8041521 А, 13.02.1996. МАЗИССТР. е. е!. ГЕоаттд $1ад$ ог Зате$$ Зее! эзте_та шт вес пс агК Гигпасе. Несс Гигпасе Сотегепсе Ргосеедта$, Сещго ЗуПирро Маепай. Коте-Кау, 1993, р.289-294. СВ 764213 А, 19.12.1956. $ 4528035 А, 09.07.1985. КУ 2075514 СЛ, 20.03.1997. ЗЦ 13793171 АЛ, 07.03.1988. ЕК 2634787 АЛ, 02.02.1990. (85) Дата перевода заявки РСТ на национальную фазу: 18.05.2002 (86) Заявка РСТ: МО 00/00345 (18.10.2000) (87) Публикация РСТ: М/О 01/29271 АЛ (26.04.2001) (98) Адрес для переписки: 129010, Москва, ул. Б. Спасская, 25, стр.3, ООО "Юридическая фирма Городисский и Партнеры", пат.пов. Ю.Д.Кузнецов, рег.№ 595 (72) Изобретатель: ТУВНЕС Петтер (МО), ЭНГ Торвальд Абель (МО) (73) Патентообладатель: НОРСК ХЮДРО АСА (МО) (74) Патентный ...

COATING OF REFRACTORY OVENS PROCESS TO EXTEND THE LIFE OF AOD

Patent FR2394609B1

Metallurgical furnace for the smelting of metallic materials and / or the production of liquid metal, such as an electric steelworks furnace, and method of production using such a furnace.

L'invention concerne un four (1) de fusion de matières métallifères et/ou d'élaboration de métal liquide (4) du type dans lequel ledit métal (4) est surmonté par une couche de laitier (5) susceptible d'être affectée par un phénomène de "moussage", caractérisé en ce qu'une paroi latérale dudit four comporte un orifice (17) débouchant dans un bac adjacent (22) coiffé d'une voûte (25), ledit bac (22) pouvant recueillir par débordement à travers ledit orifice (17) une partie dudit laitier (5) lorsque ledit phénomène de moussage prend des proportions risquant d'entraîner des dommages sur ledit four (1). L'invention concerne également un procédé d'élaboration de métal liquide utilisant un tel four. The invention relates to a furnace (1) for melting metalliferous materials and / or producing liquid metal (4) of the type in which said metal (4) is surmounted by a layer of slag (5) liable to be affected. by a "foaming" phenomenon, characterized in that a side wall of said oven has an orifice (17) opening into an adjacent tank (22) capped with a vault (25), said tank (22) being able to collect by overflow through said orifice (17) a part of said slag (5) when said foaming phenomenon assumes proportions that risk causing damage to said oven (1). The invention also relates to a process for producing liquid metal using such a furnace.

PROCESS FOR PRODUCING A FOAMING SLAG OVER A STAINLESS STEEL MELTING IN AN ELECTRIC OVEN

Manufacturing method of steel and hydraulically active binder

강철 및 수경 활성 결합제의 제조 방법 Method for manufacturing steel and hydroponic active binder 강철 및 수경 활성 결합제의 제조에서 선철중의 탄소의 산화제로서 예컨대, 강철 슬래그와 같은 산화철이 풍부한 슬래그를 사용한다. 슬래그를 환원시켜, 향상된 수경성을 지닌 용광로 슬래그와 같은 종류의 것을 생성시킨다. Slag rich in iron oxide, such as, for example, steel slag, is used as the oxidizing agent of carbon in pig iron in the production of steel and hydroponic active binders. The slag is reduced to produce the same kind of furnace slag with improved hydraulic properties.

Metal fabrication process in electric furnaces

Scum and foam removal from molten slag - using briquettes moulded from organic materials, refractories and binder

One or more briquettes are thrown onto the slag, the briquettes contg., by wt., 17-72% organic material, 20-80% refractory material, and 3-15% binder. The organic material is pref. wood chips; sawdust; rice husks; plant materials of their by-prods. or waste prods.; burnt prods. of plant materials; coal, tar or pitch. The refractory is pref. silica sand; silica; marl; clay; olivine; limestone; dolomite; magnesite; bauxite; alumina; or their calcined prods. The binder is pref. starch; resins; sugars; proteins; water glass; aluminium phosphate; or colloidal silica. Used e.g. in converters employed in mfg. steel.

Process for reclaiming steel making slags - by adding carbon and flux and blowing with oxygen at elevated temp.

A process for reclaiming slags in steel making in which addition of pure carbon and fluxing agents is made to molten slag and oxygen is blown in, such that the composition of the slag is varied according to its purpose. The process may be carried out in a converter or other vessel. Slags may be prepared for recovery of chalk, used as aggregate for concrete etc. Strength and chemical composition can be controlled to make suitable, e.g. low Fe or P. No special equipment is required.

USE OF MAGNESITE AND METHOD FOR IMPLEMENTING SUCH USE

L'INVENTION CONCERNE UNE UTILISATION DE LA MAGNESITE POUR LA MODIFICATION ETOU POUR LE MOUSSAGE DE LAITIERS METALLURGIQUES 1 DANS DES RECIPIENTS 8 POUR METAUX EN FUSION 4, REVETUS, AU MOINS DANS LA ZONE DU LAITIER 2, D'UN MATERIAU REFRACTAIRE BASIQUE, DE LA MAGNESITE NATURELLE (MGCO), SELECTIONNEE ET FRAGMENTEE JUSQU'A UNE TAILLE DE GRAINS COMPRISE ENTRE 0 ET 15 MM, ETANT INTRODUITE DANS LE LAITIER 1 EN FORMATION.

Method of producing metal melts and an electric arc furnace therefor

ABSTRACT OF THE DISCLOSURE: In a method of producing metal melts, in particular a steel melt from scrap, in an electric arc furnace having at least one graphite electrode, organic substances are charged into the electric arc through a central longitudinal recess of the graphite electrode so as to reduce electrode consumption.

Method and device to determine the height of the foamed slag layer during oxygen blowing in a steel converter

Determination of the height of foamed slag during the refining process in a steel converter (1) comprises recording and evaluating, as a variable for the foaming slag (9, 9'), the sound emissions (8) from the steel converter in the region of the converter opening (3) using a microphone (11). The higher frequencies above 1 kHz are used to characterize the foamed slag heights. <??>An Independent claim is also included for a device used for carrying out the above process comprising a measuring device (10) consisting of a microphone and an evaluation device (13). <??>Preferably the microphone utilizes a selective amplification effect for high sound frequencies to obtain a high signal/noise ratio with amplification of the signal and to obtain a high direction effect during sound measurement.

PROCESS AND SYSTEM FOR THE ELIMINATION OF THE EXPANSIBILITY OF THE LD E LE SHIELD SLAG

processo e sistema para a eliminação da expansibilidade da escória de aciaria ld e le. a presente invenção refere-se a um processo e a um sistema para a eliminação da expansibilidade da escória de aciaria que compreende um britador primário (3) para redução dos fragmentos em função de sua granulometria; um separador magnético (4) para remoção de fragmentos metálicos superiores a uma determinada granulometria (5); secador rotativo (6) para secagem da escória isenta de fragmentos metálicos maiores; moinho impactor (11) para desagregar e fragmentar escórias maiores a uma granulometria predeterminada; um classificador (12) para aero classificação e arraste de partículas finas e superfinas; resfriador (17) de partículas de escória superiores a uma granulometria predeterminada por meio da troca de calor e a remoção das partículas finas e superfinas não coletadas pelo moinho impactor (11); peneira vibratória (21) provida de dois ou mais decks (23, 24, e 25) com telas de dimensões predeterminadas; separadores magnéticos de baixa intensidade (26, 27 e 28) com geração de frações de escória não magnética isenta de ferro metálico e de monóxido de ferro e de frações magnéticas compostas por ferro metálico e monóxido de ferro; e separadores magnéticos de baixa intensidade (35, 36 e 37) para reprocessamento das frações magnéticas com a geração de concentrado de com alto teor de ferro metálico e um produto com alta concentração de monóxido de ferro. process and system for eliminating the expandability of steel slag ld and le. the present invention refers to a process and a system for the elimination of the expansion of the steel slag which comprises a primary crusher (3) for reducing the fragments as a function of their particle size; a magnetic separator (4) for removing metallic fragments larger than a certain granulometry (5); rotary dryer (6) for drying the slag free from larger metallic fragments; impact mill (11) to deaggregate and fragment larger slag to a predetermined ...

Method for production of foamed slag

FIELD: metallurgy. SUBSTANCE: mixture of metal oxides and carbon are loaded in the electric arc furnace, under the slag on the metal-slag boundary the metal oxide is reduced with carbon, and limestone is thermally decomposed, and the gas obtained through the use of bubbles facilitates slag foaming. The mixture added in the form of moulded articles, such as briquettes or pellets, contains basic components selected from the group: iron oxide, in any form, for example, in the form of heat scale, dried converter dust or EAF/LF, sludge from converter, coke, graphite, ballast material for all grades of stainless steel in the form of FeCr, ferritic meal, ballast material for austenitic and duplex stainless steels in the form of FeCr, meal ferritic, austenitic meal, meal duplex, nickel oxide (NiO x ), as well as binding material. EFFECT: invention enables to develop the material by means of which foaming of slag with high content of chromium oxide is achieved. 4 cl, 1 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 455 366 (13) C1 (51) МПК C21C C21C 5/52 7/00 (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2011104083/02, 03.07.2009 (24) Дата начала отсчета срока действия патента: 03.07.2009 (72) Автор(ы): РАЙХЕЛЬ Йохан (DE), РОЗЕ Лутц (DE) (45) Опубликовано: 10.07.2012 Бюл. № 19 2 4 5 5 3 6 6 (56) Список документов, цитированных в отчете о поиске: WO 2004/104232 А, 02.12.2004. WO 00/014287 A1, 16.03.2000. RU 2001121 C1, 15.10.1993. SU 1362749 A1, 30.12.1987. (85) Дата начала рассмотрения заявки PCT на национальной фазе: 07.02.2011 2 4 5 5 3 6 6 R U (87) Публикация заявки РСТ: WO 2010/003401 (14.01.2010) C 1 C 1 (86) Заявка PCT: DE 2009/000951 (03.07.2009) Адрес для переписки: 109012, Москва, ул. Ильинка, 5/2, ООО "Союзпатент", Е.В.Воробьевой (54) СПОСОБ ПОЛУЧЕНИЯ ВСПЕНЕННОГО ШЛАКА (57) Реферат: Изобретение относится к области металлургии и может быть использовано для получения вспененного шлака в ...

Multi-purpose Fe-containing briquette with heat compensation function, manufacturing method thereof and slag process using the sam

본 발명은, 단광 혼합물을 가압 및 건조하여 제조되는 다기능 전로용 함철 단광에 관한 것으로, 상기 단광 혼합물은, 코크스 제조 공정에서 발생하는 카본 부산물 100 중량부에 대하여, 밀스케일(Mill scale) 및 제강 슬러지 중 어느 하나 이상을 포함하는 제강 부산물 800~1800 중량부, 생석회 슬러지 100~300 중량부 및 바인더 30~100 중량부를 포함하여, 열원 보상 기능을 부가됨으로써 이를 이용한 취련 공정시 용선 사용 조건에 구애 받지 않고 안정적인 공정 운영이 가능하며, 제철 부산물을 효율적으로 재사용할 수 있어 친환경적일 뿐만 아니라 경제적인 장점이 있다.

Briquette containing silicon-containing residues (versions) and method of briquette production

FIELD: briquette containing silicon-containing residues and methods of its production. SUBSTANCE: silicon-containing residues accumulated especially in synthesis of organosilanes from metallic silicon and methyl chloride are worked to form briquettes which are subsequently used as addition for regulation of quality of pig iron in cupolas to avoid use of expensive regeneration of valuable components or full rejection to waste of the silicon-containing residues. Briquettes also includes 1-10 wt.% of cardboard fiber, 5-40 wt. % of hydraulic cement and 2-20 wt.% of additional additions which affect the quality of pig iron. Briquettes are produced silicon-containing residues with cardboard fiber and hydraulic cement and subsequent addition to mixture of water and formation of briquettes from produced paste mixture by pressing. Diameter of briquette cross-section is about 20 mm and height about 50 mm. Briquettes are stable enough mechanically and thermally, stable for operation in melting furnace. Index of utilization of silicon particles of small sizes introduced into pig iron amount to 85% that is equal to that of lumpy ferrosilicon. EFFECT: higher efficiency. 7 cl, 1 tbl 895 О0ОтСЬсС ПЧ ГЭ РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ 'ЗВО“” 2424 058 ^ Сл (51) МПК С 22В 1/242 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 97100815102, 23.01.1997 (30) Приоритет: 24.01.1996 ОЕ 19602486.2 (46) Дата публикации: 27.12.1998 (56) Ссылки: ЕР 0287934 А, 1991. ЕК 2300812 А, 1976. 54 342922 А, 1972. 5 15215 А, 1926. ЗЧ 802386 А. 1981. 5Ц 825666 А, 1978. 0$ 4230438 А, 1980. ЕК 2478127 А, 1981. Ц$ 4336218 А, 1982. \О 8002566 А, 1980. ММО 9309257 А, 1993. ЕР 0206008 А, 1986. ЕР 0272242 А, 1987. 0Е 2638117 А, 1977. РЕ 2517543 А, 1976. СВ 1574119 А, 1976. (71) Заявитель: Элкем Аса (МО) (72) Изобретатель: Лутц Штефан (0Е) (73) Патентообладатель: Элкем Аса (МО) (54) БРИКЕТ, СОДЕРЖАЩИЙ КРЕМНИЙСОДЕРЖАЩИЕ ОСТАТКИ (ВАРИАНТЫ), И СПОСОБ ЕГО ПОЛУЧЕНИЯ (57) ...

Briquette containing silicious residual matter, useful as additive for metallurgical purposes and process for the manufacture thereof

Zur Vermeidung einerseits der aufwendigen Aufbereitung zur Wiedergewinnung der wertvollen Bestandteile oder andererseits des totalen Verlusts durch Deponierung von siliciumhaltigen Rückständen, wie sie insbesondere bei der Synthese von Organosilanen aus metallischem Silicium und insbesondere Methylchlorid anfallen, werden solche siliciumhaltige Rückstände zu ihrer nutzbaren Verwertung gemäß der Erfindung zu Briketts verarbeitet als Additiv für die Qualitätseinstellung von im Kupolofen erzeugten Gußeisen. Die Briketts enthalten außer dem siliciumhaltigen Rückstand 1 - 10 Gew.% an Kartonmasse (Pappe), 5 - 40 Gew.% an hydraulischem Zement und 0 - 20 Gew.% an zusätzlichen, die Gußeisenqualität beeinflussenden Zusatzstoffen. Die Zement und Pappmasse enthaltenden Briketts sind für den Schmelzofenbetrieb hinreichend mechanisch und thermisch stabil. Der Ausbeutegrad im Gußeisen für das eingesetzte, feinteilige Silicium liegt bei 85 % und damit in der gleichen Größenordnung wie bei Verwendung von stückigem Ferrosilicium. On the one hand to avoid the time-consuming preparation for recovery the valuable components or on the other hand the total loss from landfilling of silicon-containing residues, as especially in the synthesis of organosilanes made of metallic silicon and especially methyl chloride accumulate, such silicon-containing residues become theirs usable recovery according to the invention processed into briquettes as an additive for the quality adjustment of in the cupola furnace produced cast iron. The briquettes contain not only the silicon-containing one Residue 1 - 10% by weight of cardboard mass (cardboard), 5 - 40% by weight of hydraulic cement and 0 - 20% by weight of additional, additives influencing cast iron quality. The briquettes containing cement and cardboard are for the Melting furnace operation sufficiently mechanically and thermally stable. The degree of yield in cast iron for the fine-particle used Silicon is around 85% and therefore of the same ...

USE OF MAGNESITE AND METHOD FOR CARRYING OUT SUCH A USE

Process for the manufacture of pig iron or steel and cement clinker from slag

Operating method for converter

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Converter slag modifier and method for preparing low-alkalinity slag system by using same

本发明提供了一种转炉渣改质剂及利用其制得低碱度渣系的方法，该改质剂成分按重量百分比计如下：高炉除尘灰、铁尾矿之和为90％‑100％，且高炉除尘灰/铁尾矿的质量比＝0.7～6.0，废弃铝碳砖质量百分含量0～10％。利用上述转炉渣改质剂制得低碱度渣系的方法，将该改质剂与转炉渣按照质量比为0.5～1.3充分均匀混合，且混合后的混合料满足：M c ＞0.27×M Fe2O3 +0.2×M FeO ；M CaO ＜2.8×M SiO2 +0.941×M Al2O3 +1.4×M MgO ；将混合料在非氧化气氛条件下焙烧温度不低于1450℃，时间不低于20分钟，得到碱度0.5‑1.3渣系。本发明解决转炉渣再利用的同时减少废弃物排放并得到高附加值产品的低碱度渣系。

Method of extending useful life of refractory lining material in aod furnace

Method of treating molten slags in steel-making process

ABSTRACT OF THE DISCLOSURE The invention relates to a method of regenerating molten slags in a steel-making process. In accordance with the invention, oxygen is blown at the molten slags after solid carbon and fluxes are newly added thereto. The composition of the slags is varied to correspond to the intended uses thereof. The varying of the composition of the slags and the regenerating of the slags is accomplished in a converter or any other vessel having the same facilities as those of a converter.

Method and device for refining pig iron

Method of producing metal melts

내용 없음. No content.

Process and device for refining cast iron, as well as steels, metals and slag obtained by said process or similar process

Slag foaming soot and slag foaming calming method and converter winding method

슬래그 포밍 진정재는, 수산화물을 50질량％ 이상 포함하고, 흡열량이 1800J/g 이상이다. 슬래그 포밍 진정 방법은, 이 슬래그 포밍 진정재를, 슬래그를 배재하는 배재 레이들에 투입한다. 전로 취련 방법은, 1기의 전로에 장입된 용선에 탈Si 취련 및 탈P 취련을 행하여, 혹은 2기 이상의 전로 중 적어도 1기의 전로에 장입된 용선에 탈Si 취련을 행하여, 전로를 틸팅시키고, 이 전로 내에 용선을 남긴 상태에서 전로 내의 슬래그를 노구로부터 배재할 때에, 상기 슬래그 포밍 진정 방법을 적용하고, 배재 후에, 전로 내의 용선에 탈C 취련을 행한다.

PROCESS FOR PREVENTING OVERFLOW OF FOAM DURING REFINING OF RAW CAST IRON AS WELL AS LOWERING PHOSPHORUS CONTENT, AND PRODUCT AND DEVICE FOR CARRYING OUT THIS PROCESS

PROCEDE, PRODUIT ET DISPOSITIF POUR EMPECHER LE DEBORDEMENT DE MOUSSE LORS DE L'AFFINAGE DE FONTE BRUTE POUR OBTENIR DE L'ACIER AINSI QUE POUR REDUIRE LA TENEUR EN PHOSPHORE, PAR SOUFFLAGE D'OXYGENE EN PRESENCE DE SUBSTANCES BASIQUES FORMANT LAITIER AVEC INSUFFLATION ETOU SOUFFLAGE SIMULTANE DE CARBURE DE CALCIUM EN GRAINS FINS RESPECTIVEMENT DANS OU SUR LA MASSE EN FUSION; ON INTRODUIT LE CARBURE DE SILICIUM DE FINE GRANULOMETRIE A L'INSTANT T AUQUEL LA VITESSE DE DECARBURATION DCDT AUGMENTE, LE LAITIER MOUSSE BEAUCOUP ETOU LE LAITIER PRESENTE UN POTENTIEL OXYGENE ELEVE, EN UNE QUANTITE QUI CORRESPOND A L'EXCES D'OXYGENE DU LAITIER.

PROCEDURE FOR THE MANUFACTURE OF GROSS OR STEEL IRON AND CEMENT CLINKER FROM ESCORIES.

PARA LA OBTENCION DE ARRRABIO O ACERO Y CEMENTO CLINKER A PARTIR DE LAS ESCORIAS SE PROPONE, QUE LAS ESCORIAS LIQUIDAS CONTENIENDO OXIDO DE HIERRO, COMO P. E. ESCORIAS DE ACERIAS, SE HAGAN REACCIONAR CON PORTADORES DE OXIDO DE HIERRO, COMO P. E. MENAS, ESCAMAS DE OXIDO O SIMILARES Y CALIZA PARA OBTENER UNA ESCORIA QUE CONTIENE FERRITA, Y LAS ESCORIAS FERRITICAS FORMADAS SE REDUCEN EN UN REACTOR DE REDUCCION COMO P. E. UN REACTOR DE BAÑO DE HIERRO, RECOBRANDOSE LA FASE DE SINTERIZACION COMO CLINKER.

Forming sedation method for discharged slag and refining equipment used for this

Process for producing foamed slag

Die Erfindung betrifft ein Verfahren zur Erzeugung von Schaumschlacke. Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren bzw. Material bereitzustellen, mit dem das Schäumen einer Schlacke mit hohem Chromoxidgehalt erreicht werden kann. Dies geschieht dadurch, dass ein Gemisch aus Metalloxiden und Kohlenstoff in einen Elektrolichtbogenofen eingegeben wird, unterhalb der Schlacke, an der Metall-Schlackegrenze, das Metalloxid durch Kohlenstoff reduziert und Kalkstein thermisch dissonant wird und die entstehenden Gase durch Blasenbildung das Schlackenaufschäumen bewirken.

A method for producing molten metal and an electric arc furnace that provides it.

Method of manufacturing pig iron or steel and cement clinker from slags

To produce pig iron or steel and cement clinker from slags it has been proposed to react iron-oxide containing liquid slags, such as, e.g., steelworks slag, with iron oxide carriers, such as, e.g., ores, cinders or the like and lime to a ferrite-containing slag and to reduce the formed ferrite slag in a reduction reactor, such as, e.g., an iron bath reactor, whereupon the sinter phase is discharged as a clinker.

PROCESS FOR INTERRUPTING OVERFLOW DURING REFINING OF FERROUS METALS IN FUSION BY CONVERSION TO OXYGEN

PROCEDE D'ARRET DU DEBORDEMENT DE L'EMULSION PAR LE BEC D'UN CONVERTISSEUR D'AFFINAGE A L'OXYGENE. LE DEBORDEMENT EST EMPECHE PENDANT L'AFFINAGE A L'OXYGENE PAR INTRODUCTION DE GAZ INERTE DANS LE CONVERTISSEUR LORSQUE CE DEBORDEMENT EST IMINENT OU A DEBUTE. UN MODE DE MISE EN OEUVRE AVANTAGEUX CONSISTE A INJECTER L'ARGON EN MELANGE AVEC L'OXYGENE PAR LA LANCE DE SOUFFLAGE A UN DEBIT CORRESPONDANT A5 A 30 DE CELUI DE L'OXYGENE. APPLICATION A L'AFFINAGE DE L'ACIER. PROCESS FOR STOPPING THE OVERFLOW OF EMULSION BY THE BEC OF AN OXYGEN REFINING CONVERTER. OVERFLOW IS PREVENTED DURING OXYGEN REFINING BY INTRODUCING INERT GAS INTO THE CONVERTER WHEN THIS OVERFLOW IS IMINENT OR HAS BEGUN. ONE ADVANTAGEOUS MODE OF IMPLEMENTATION CONSISTS OF INJECTING THE ARGON MIXED WITH THE OXYGEN BY THE BLOW LANCE AT A CORRESPONDING RATE A5 TO 30 OF THAT OF THE OXYGEN. APPLICATION TO STEEL REFINING.

Slag forming suppression method and converter refining method

Plant for the production of metal melts

To be able to produce metal melts using any metal carriers incurring in metallurgical practice as the charging materials, namely in the most diverse quantitative compositions, a plant for producing metal melts is provided with the following characteristic features: an electric arc furnace vessel ( 1 ) provided with one charging opening ( 11, 21 ) for a metal melt and/or scrap and/or direct reduced metal, in particular direct reduced iron, and/or ore and at least one electrode ( 16 ) and one slag tapping means ( 22 ), an oxygen-blowing converter vessel ( 3 ) provided with one melt tapping means ( 41 ), wherein the oxygen-blowing converter vessel ( 3 ) and the electric arc furnace vessel ( 1 ) form a unit which is connected via an overflow weir ( 34 ) and which is rigidly mounted on the foundation and, wherein the bath surface related specifically to the bath volume is smaller in the oxygen-blowing converter vessel ( 3 ) than in the electric arc furnace vessel ( 1 ) and the oxygen-blowing converter vessel ( 3 ) shares a common reaction space with the electric arc furnace vessel ( 1 ), which space is arranged above the bath level of these vessels. (FIG. 1).

Process for producing a foaming slag above a stainless steel melted in an electric furnace

A process for producing a foaming slag above a stainless steel melted in an electric furnace, in which:a powder containing at least one metal oxide and carbon in its composition is introduced into the slag,at least one oxide present in the powder is reduced by its reaction with the carbon to form in the slag bubbles composed of the metal of the metal oxide and of carbon monoxide, the bubbles present in the slag giving rise to a slag in the form of a stable foam.

Process for producing foamed slag

The invention is directed to a process for producing foamed slag. The object of the invention is to provide a process and material by which the foaming of a slag with a high chromium oxide content can be achieved. This object is met in that an electric arc furnace is charged with a mixture of metal oxides and carbon and, below the slag at the metal-slag interface, the metal oxide is reduced by carbon and limestone becomes thermally discordant, and the occurring gases cause the slag to foam due to the formation of bubbles.

METHOD AND USE OF CALCIUM NITRATES FOR FOAMING STEEL SLAGS

Process for the continuous refining of metal and a facility for carrying out said process

A process of continuous metal refinement, comprising feeding molten metal to a reaction chamber, introducing gaseous and solid oxidants, adding bulk materials, fully converting the metal and slag into a foamy emulsion, creating, in the reaction chamber, an increased pulsating pressure and a considerable deviation of a system from thermodynamic equilibrium by gray of creating a self-organizing system of chemical reaction with gas evolution and taking off the emulsion into a refining sump at the critical speed of egress of two-phase liquid, separating the metal and slag in said refining sump and withdrawing the gas through a high layer of emulsion at a definite rate. A unit for continuously refining metal, comprising a spherical reaction chamber (I) with a channel (5) for supplying molten metal and a channel (4) for feeding bulk materials, pith a device for feeding a gaseous oxygen made in the form of oppositely arranged lances, a cylindrical connection channel (2), a refining sump (3) with tap holes (20, I5) for withdrawing metal and slag, respectively, the slag tap hole is divided into two vertical channels (I6, I7) for separating slay and gas, respectively, a channel (I3) for the delivery of slag-forming materials, lances (II, I2) for feeding oxygen.

METHOD FOR PRODUCING METAL MELT, IN PARTICULAR STEEL MELT

Process for controlling a metallurgical process comprises forming slag on a molten bath surface by using the speed of the slag formation and degradation as control parameters for adjusting the parameters inducing slag formation

Process for controlling a metallurgical process comprises forming slag on a molten bath surface by using the speed of the slag formation and degradation as control parameters for adjusting the parameters inducing slag formation. An Independent claim is also included for a device for controlling a metallurgical process comprising units (11, 12) for determining the speed of the slag formation and degradation, and a unit (13) for adjusting the parameters inducing slag formation depending on the speed.

Patent JPS5523781B2

Manufacturing method of steel and hydraulic active couplers

Method for improving recovery of afterburning heat in vessel providing lance

(57)【要約】 【課題】 溶湯鉄基金属とスラグとの装入物が装入され た容器内での後燃焼熱の回収改良方法は、装入物に酸素 ガスを導入するためのランスを備える。 【解決手段】 この方法は、溶湯を鋼に精錬するために ランスの少なくとも一つの第１のノズルを通って酸素を 装入物に吹き込む工程を備える。ランスの少なくとも一 つの第二のノズルを通って、第一のノズルの上に間隙を 隔てた少なくとも一箇所から、容器からスラグが実質的 に溢れさせず少なくとも約４０％の後燃焼熱伝達効率を 得るための量の発泡スラグが生成するのに有効な酸素流 量でもって酸素を吹き込む。その際、第二のノズルから の酸素流量は、装入物のピーク脱炭期間の開始時期付近 で最小にする。酸化鉄含有ペレットも装入物に添加でき る。この場合、第一のノズルからの酸素流量は、酸化鉄 含有物質を投入しながら減量し、且つ減量した酸素流は 不活性ガスを補充してもよい。

PROCESS FOR PREVENTING THE OVERFLOW OF FOAM IN THE REFINING OF THE CAST IRON AS WELL AS FOR LOWERING THE PHOSPHORUS CONTENT, AS WELL AS AN AGENT AND DEVICE FOR IMPLEMENTING THE PROCESS

USE OF ARGON IN THE PROCESS OF REFINING STEEL IN FUSION WITH BASIC OXYGEN TO CONTROL SPRAY

Process for producing foamed slag

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren bzw. Material bereitzustellen, mit dem das Schäumen einer Schlacke mit hohem Chromoxidgehalt erreicht werden kann. Gelöst wird diese Aufgabe dadurch, dass ein Gemisch aus Metalloxiden und Kohlenstoff in einen Elektrolichtbogenofen eingegeben wird, unterhalb der Schlacke, an der Metall-Schlackegrenze, das Metalloxid durch Kohlenstoff reduziert und Kalkstein thermisch dissonant wird und die entstehenden Gase durch Blasenbildung das Schlackenaufschäumen bewirken. The invention has for its object to provide a method or material with which the foaming of a slag with a high chromium oxide content can be achieved. This object is achieved by introducing a mixture of metal oxides and carbon into an electric arc furnace, below the slag, at the metal slag boundary, reducing the metal oxide by carbon, rendering the limestone thermally dissonant, and causing the resulting gases to form slag by bubbling.

Process for the treatment of steel, in particular for refining steel for the production of steel

Soundproofed conduit to discharge fumes

Soundproofed conduit to discharge fumes, advantageously associated with assemblies to discharge fumes for melting systems in steel production plants, the conduit being located between the ventilation system (14) and an outlet chimney (13), at least the first segment (19a) of the discharge conduit defining a section with a value (A) through which the fumes transit, the conduit (12) defining a path, from the relative ventilation system (14) to the discharge chimney (13), comprising at least two counter-opposed and controlled changes in direction (15a, 15b) defining at least respective consecutive segments (19a, 19b, 19c) arranged one at an angle to another, the changes in direction being functionally configured so as to cause phase and counter-phase effects of the sound waves generated by the fluid in transit, the phase and counter-phase effects having the purpose of at least deadening partly the sound waves caused by the passage of the fluid.

Method and device to determine the height of the foamed slag layer during oxygen blowing in a steel converter

Briquette as an additive for metallurgic purposes comprising silicon-containing residues, and process for its production

Briquette comprising silicon-containing residues as an additive for metallurgic purposes. Silicon-containing residues, as they accumulate especially during the synthesis of organosilanes out of metallic silicon, and especially methyl chloride, are processed according to the invention to briquettes, being additives for the quality adjustment of cast iron being produced in a cupola furnace in order to avoid either costly regeneration for the recovering of the valuable components or the total dumping of said silicon-containing residues. Besides the silicon-containing residue the briquettes contain 1 - 10 percent by weight of cardboard fibre, 5 - 40 percent by weight of hydraulic cement and 0 - 20 percent by weight of additional additives having influence on the quality of the cast iron. The cement- and cardboard fibre-containing briquettes are mechanically and thermally sufficiently stable with respect to the operation of the melting furnace. The yielding rate of the inserted small-sized silicon in the cast iron is about 85 % and reaches thereby the same range of lumpy ferrosilicon.

Composition and process to create foaming slag cover for molten steel

Slag formed in steel melt operations is foamed to create a protective cover using a composition comprised essentially of calcium oxide.

Method and apparatus for electric steelmaking

A burner/injector (200) and method for providing a localized impingement flame or multiple flames for scrap heating and melting through use of a fluid fuel and at least one oxygen rich oxidizing gas. The burner/injector (200) includes a liquid-cooled combustor for generating an impinging flame directed toward a scrap pile and a structure for injecting a controllable amount of solid carbonaceous fuel (204) and a controllable flow of high velocity oxidizing gas (232) into space that has been previously occupied by the impinging flame.

Method and use of calcium nitrate for foaming of steel-making slags

The invention concerns a method of foaming steel-making slags, wherein calcium nitrate is added to the slag alone or together with carbon. Calcium nitrate and carbon can be fed into the slag trough chutes or trough lances with injection gases such as air, nitrogen, carbon dioxide or inert gases. The solid components can be injected separately or with the same lance as a mixture or injected as pre-fused granules. For ladle slag foaming, calcium nitrate and carbon is added from above the melt. It is preferred to use a ratio between calcium nitrate and carbon in the range from 4.1 to 2:1. For foaming of stainless steel slag, it is preferred to add FeSi, Al or Mg before calcium nitrate and carbon is added or injected into the slag by an injection gas. Air, nitrogen, carbon dioxide or inert gases can be used as injection gas. The invention also concerns the use of calcium nitrate as a foaming agent for steel-makings slags. The invention can be used for slag foaming in electric arc furnaces and ladles.

A kind of method that dephosphorization clinker foamed reduces smelting iron loss

本发明公开了一种脱磷炉渣泡沫化降低冶炼铁损的方法，属于转炉炼钢技术领域。本发明的一种脱磷炉渣泡沫化降低冶炼铁损的方法，先向转炉中加入铁水，而后在转炉脱磷期向转炉中加入发泡剂，该发泡剂包括铝矾土，脱磷期结束后将转炉底吹强度调整至0.2～0.4Nm 3 /min/t钢，通过底吹使得炉泡沫化，转炉倒渣之前镇静保持10～30s再倒出脱磷渣。本发明进通过加入铝矾土作为发泡剂，改善了脱磷后的炉渣状态与组成，并控制转炉底吹强度使炉渣泡沫化，可以使炉渣中的铁珠与炉渣分离，可以降低了脱磷过程中的铁损，使渣中铁珠含量大幅降低，进而降低了钢铁料消耗。

Controlled Foamed Slag Manufacturing Method

본 발명은 거품성 슬래그를 조절 가능하게 형성하므로서 염기성 산소로에서의 연소 후 열 회수를 개선시키는 방법에 관한 것이다. 거품성 슬래그는 랜스 높이를 증가시키고 산소 송풍사이클시 랜스 높이 감소 속도를 감소시키므로서 생성된다. 거품성 슬래그는 충전물에 대한 피크 탈탄화 기간의 대략적인 출발점을 계산하고 피크 탈탄화 기간의 개시시에 최소가 되도록 산소 유동 속도를 조정하므로서 슬로핑을 방지하도록 조절된다.

Manganese waste slag treatment

A method of processing a ferroalloy waste slag in a reactor which includes the steps of treating the slag with a metallic reductant and a conditioning flux to release a metal oxide and reduce it to metallic form, to use as a commercially acceptable silicon-containing alloy and to form a waste slag which is detoxified by means of granulation and separating the detoxified slag from silicon-containing alloy particles.

Foaming slag manufacturing method using multi-circuit lance

슬래그 및 용융 철금속의 충전물을 함유하는 용기에서 후연소 열회수를 향상시키는 방법은 충전물로 산소가스를 공급하기 위한 랜스의 용도를 포함한다. 본 발명의 방법은 강철이 되는 용융금속을 제련하기 위해 랜스의 적어도 하나의 제 1노즐을 통해 충전물로 산소를 송풍하는 단계를 포함한다. 산소는 용기에서 나오는 슬래그의 많은 오버플로우(overflow)없이 적어도 약 40%의 후연소 열전달 효율을 얻기 위한 양으로 거품성 슬래그를 생성시키기에 유효한 산소유동율로 제 1노즐 위로 이격된 적어도 하나의 위치에서 랜스의 적어도 하나의 제 2노즐을 통해 송풍된다. 제 2노즐에서 나오는 산소유동율은 충전물의 피크 탈탄화 기간의 시작점 부근에서 최소가 된다. 철산화물을 함유하는 펠리트는 충전물에 부가될 수 있다. 이 경우, 제 1노즐에서 나오는 산소유동율은 철산화물을 함유하는 물질이 부가되는 동안 감소될 수 있고, 감소된 산소유동은 불활성 가스로 보충될 수 있다.

Method for defoaming converter double-slag smelting steel slag

本发明公开了一种转炉双渣冶炼钢渣去泡沫化的方法，包括：在双渣冶炼第一次倒炉前，通过转炉高位料仓向炉内加入适量氧化铁皮球或除尘灰泥球，打开泡沫渣,形成气体排出通道,将泡沫渣中的气体释放,去除泡沫化。本发明的目的是提供一种转炉双渣冶炼钢渣去泡沫化的方法，使转炉双渣工艺冶炼第一次倒渣炉渣泡沐化情况明显减少；减少了倒渣操作时间；降低了炉渣带金属量，减少金属损失，降低了钢铁料消耗。

Foamy slag process using multi-circuit lance

A method of improving post-combustion heat recovery in a vessel containing a charge of molten ferrous metal and slag includes the use of a lance for the introduction of oxygen gas into the charge. The method includes blowing oxygen into the charge through at least one first nozzle of the lance for refining the molten metal into steel. Oxygen is blown through at least one second nozzle of the lance from at least one location spaced above the first nozzle at an oxygen flow rate effective to produce foamy slag in an amount for obtaining a post-combustion heat transfer efficiency of at least about 40% without appreciable overflow of the slag from the vessel. The oxygen flow rate from the second nozzle is at a minimum at about a starting point of a peak decarburization period of the charge. Iron oxide containing pellets may also be added to the charge. In this case, the oxygen flow rate from the first nozzle may be reduced while the iron oxide containing material is being added, and the reduced oxygen flow may be replenished with an inert gas.

USING ARGON IN A BASIC RESEARCH PROCESS FOR REGULATING RINSE

Method for manufacturing pig iron or steel and cement clinker from slag

슬래그로부터 선철 또는 강 및 시멘트 클링커를 제조하기 위해, 산화철을 함유하는 액체 슬래그, 예컨대 제강소로부터의 슬래그는 산화철 캐리어(예컨대, 광석, 스케일 또는 유사 물질) 및 석회와 반응하여 페라이트 함유 슬래그를 형성하고, 이것은 이어서 환원을 위해 환원 반응기 (예컨대, 철욕 반응기) 내로 도입된다. 그다음, 소결상은 클링커 형태로 제거된다.

Process for producing foamed slag

The invention is directed to a process for producing foamed slag. The object of the invention is to provide a process and material by which the foaming of a slag with a high chromium oxide content can be achieved. This object is met in that an electric arc furnace is charged with a mixture of metal oxides and carbon and, below the slag at the metal-slag interface, the metal oxide is reduced by carbon and limestone becomes thermally discordant, and the occurring gases cause the slag to foam due to the formation of bubbles.

Discharge slag foaming surppression method, and refining equipment used therefor

一種排出爐渣的起泡鎮靜方法，是當從精煉反應容器往受渣容器排渣時，鎮靜排出爐渣的起泡的方法，其特徵在於：以可滯留在已排出至前述受渣容器之爐渣的上面表層部的方式，添加具有黏度低減效果的物質作為起泡鎮靜劑。

Manufacturing process, from steelworks slag, of a cement clinker resistant to sulphated solutions

Process for impeding the overflowing of an emulsion

Method for treating slag

본 발명은 Ⅰ) 슬래그 총 중량에 대하여, 탄소계 환원제가 6.1~9.3중량%로 포함된 슬래그에 마이크로웨이브를 12~17분 동안 조사하여 Fe-C-P 합금 및 잔류슬래그를 생성하는 단계; 및 Ⅱ) 상기 Fe-C-P 합금에 플럭스를 첨가시키는 단계를 포함하는 것을 특징으로 하는 슬래그의 처리방법에 관한 것이다. The present invention comprises the steps of: I) irradiating the microwave for 12 to 17 minutes to the slag containing 6.1 to 9.3% by weight of the carbon-based reducing agent relative to the total weight of the slag to produce a Fe-C-P alloy and residual slag; And II) adding a flux to the Fe-C-P alloy.

Foamed slag and process for producing the same

Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von Schaumschlacke, umfassend: a) Bereitstellen einer schmelzflüssigen Schlacke; und b) zumindest teilweises Vermischen der schmelzflüssigen Schlacke mit einem Schaummittel, aus dem in dem Temperaturbereich, der zur Schmelzflüssigkeit der Schlacke fuhrt, zumindest ein Gas freigesetzt wird, um die Schaumschlacke zu erhalten, sowie eine Schaumschlacke erhältlich nach dem erfindungsgemäßen Verfahren The present invention relates to a process for producing foamed slag comprising: a) providing a molten slag; and b) at least partially mixing the molten slag with a foaming agent from which at least one gas is released in the temperature range leading to the molten slag liquor to obtain the foamed slag and a foamed slag obtainable by the process of the invention

Process for obtaining a foaming slag in an electrical furnace for steel manufacture

The foaming slag is obtained by means of an injection of oxygen in the vicinity of the metal-slag interface and of the addition into the slag of a carbonaceous material previously mixed with a carbonated material. These materials are mixed in such proportions that the endothermic effect of the addition of the carbonated material on the metal-slag combination is compensated by the exothermic effect of the combustion of the carbon present in the carbonaceous material.

METHOD FOR THE PRODUCTION OF RAW IRON OR STEEL AND CEMENT CLINKER FROM SLAG

A method of slag foaming a non-stainless steel melt in an electric arc furnace

Bei der Herstellung von Nichtrostfreistahl bildet sich während des Einschmelzens des Festmaterials im Elektrolichtbogenofen eine Schlacke aus, die einen hohen Anteil von Metalloxiden, vor allem von Eisenoxid beinhaltet. Die Konzentration des Eisenoxids erreicht dabei oft Werte höher als 20%. Diese Schlacke besitzt eine schlechte Schäumfähigkeit und erlaubt nicht die typischen Eigenarten einer C-Stahlschlacke zu erzielen. Um eine solche Schlacke zum Schäumen zu bringen, wird erfindungsgemäß vorgeschlagen, in den Elektrolichtbogenofen Pellets bzw. Briketts (8), die aus einem definierten Gemisch aus einem Eisenoxidträger und Eisenträger als Ballastmaterial, aus Kohlenstoff als Reduktionsmittel sowie aus einem Bindematerial bestehen, zu chargieren, wo sie unter der Schlacke (7) in der Stahlschmelze (6) schwimmend reduzierend reagieren. Die hierbei entstehenden Reaktionsgase (12), die hauptsächlich aus Kohlenmonoxid bestehen, unterstützen dabei in vorteilhafter Weise ein Aufschäumen der Schlacke. In the production of non-stainless steel forms during the melting of the solid material in the electric arc furnace, a slag containing a high proportion of metal oxides, especially of iron oxide. The concentration of iron oxide often reaches values higher than 20%. This slag has a poor foamability and does not allow to achieve the typical characteristics of a C-steel slag. In order to make such a slag foaming, it is proposed according to the invention to charge pellets or briquettes (8) consisting of a defined mixture of an iron oxide carrier and iron carrier as ballast material, of carbon as reducing agent and of a binding material in the electric arc furnace, where they react under the slag (7) in the molten steel (6) to reduce buoyancy. The resulting reaction gases (12), which mainly consist of carbon monoxide, advantageously assist in foaming the slag.

Method and apparatus for continuously processing metal

본 발명은 금속을 연속적으로 정련하기 위한 방법 및 장치에 관한 것으로, 용융 금속을 반응챔버에 공급하는 단계와, 가스상 및 고체 산화제를 도입하는 단계와, 유동재료를 공급하는 단계와 금속 및 슬랙을 기포화 에멀션으로 완전히 전환하는 단계를 포함하고 상승된 맥동 압력이 압력 챔버내에서 생성되고 그리고 이 시스템은 화학 가스 생성 반응의 자동 조정 시스템의 생성에 의해 열역학적 평형으로 부터 상당히 벗어나도록 만들어지고, 상기 에멀션은 2개 상의 액체에서 임계 과류 속도에서 침전조로 제거되고 그리고 금속 및 슬랙은 침전조에서 분리되고 가스는 예정된 속도에서 두꺼운 에멀션 층을 통해 제거되고, 본 발명의 금속을 연속적으로 정련하는 장치는 액체 금속(5) 및 유동재료(4)가 도입되는 채널이 갖춰진 구형 반응 챔버(1)와, 가스상 산소를 공급하기 위한 대칭되는 형태의 장치와, 원통형 접속 채널(2)과 금속(20) 및 슬랙(15)을 제거하도록 하는 탭 홀이 갖춰지고, 슬랙(16) 및 가스(17)를 분리하도록 하는 2개의 수직 채널로 나누어진 침전탱크(3) 및 슬랙 형성 재료(12)에서 공급하기 위한 채널 및 산소를 공급하기 위한 수단(11및 12)을 포함한다. The present invention relates to a method and apparatus for continuously refining a metal, comprising the steps of: supplying molten metal to a reaction chamber, introducing gaseous and solid oxidants, supplying fluids, and supplying metals and slags. A step of completely converting to a saturated emulsion and an elevated pulsating pressure is generated in the pressure chamber and the system is made to deviate significantly from the thermodynamic equilibrium by the creation of an automatic regulation system of the chemical gas evolution reaction, the emulsion being The two phase liquids are removed into the settling tank at the critical flow rate and the metal and slack are separated from the settling tank and the gas is removed through a thick emulsion layer at a predetermined rate, and the device for continuously refining the metal of the present invention is liquid metal (5 And a spherical reaction chamber 1 with a channel into which the flowable material 4 is introduced, A device of symmetrical form for supplying oxygen and a tab hole for removing the cylindrical connecting channel 2 and the metal 20 and the slag 15 are provided to separate the slack 16 and the gas 17. And a means for supplying oxygen and a channel for supplying from the settling tank 3 and the slack forming material 12 divided into two vertical channels.

Method for the production of effervescent-steel ingots

Method for increasing vessel lining life for basic oxygen furnaces

D-12,293 METHOD FOR INCREASING VESSEL LINING LIFE FOR BASIC OXYGEN FURNACES ABSTRACT A method for increasing the life of the refractory lining of a basic-refractory-lined vessel for the production of steel by blowing oxygen into a ferrous melt from above the surface of the melt, comprising: (a) introducing into the vessel slag forming ingredients, including dolomitic lime, such that the amount of dolomitic lime exceeds the amount normally used, and (b) introducing inert gas into the melt in such manner as to cause intensive interaction between the slag and the melt. The preferred inert gas is argon.

Apparatus for electric steelmaking

A burner/injector for providing a localized impingement flame or multiple flames for scrap heating and melting through use of a fluid fuel and at least one oxygen rich oxidizing gas. The burner/injector includes a liquid-cooled combustor for generating an impinging flame directed toward a scrap pile and a structure for injecting a controllable amount of a solid carbonaceous fuel and a controllable flow of high velocity oxidizing gas into space that has been previously occupied by the impinging flame. The burner/injector may be equipped to inject a solid slag forming materials and/or slag deoxidizing materials, and/or to inject an additional oxidizing gas for burning a small portion of preheated scrap, post-combustion of CO and iron-carbon melt refining. The burner/injector may be arranged as a simple liquid-cooled combustor permanently mounted through the furnace wall or roof, and may be equipped with single or multiple channels for injection of solid material and high velocity oxidizing gas. Separate injecting lances for high velocity oxidizing gas and/or solid carbonaceous fuel may be mounted on the furnace. Both the lances and the combustors may be equipped with a nozzles for additional injection of the additional oxidizing gas. The burner/injector means can also be arranged as a water-cooled burner/injector lance accompanied with a water-cooled oxygen injecting lance, both movable through the slag door opening toward the furnace interior, wherein the combustor of the burner/injector lance may optionally be arranged (without the use of the combustion chamber) as an external combustion device.

Patent FR2385085B1

Process for making steel and hydraulically active binders

ABSTRACT OF THE DISCLOSURE The process for making steel and hydraulically active binders uses slags rich in iron oxide, such as steel slag, as oxidizing agent for carbon in pig iron. The slag is reduced, yielding a type of blast furnace slag with improved hydraulic properties.

Method and composition for foaming slag in electric arc furnace

A slag-foaming composition and process for use in electric arc furnace steelmaking. The compositions comprise from about 15 to 80 wt % of a carbon source, the remainder consisting substantially of a source of an oxide of calcium; alternatively, the compositions comprise from about 15 to 30 wt % of a carbon source, the remainder consisting substantially of dolomite lime. The process consists of the addition, in the course of steelmaking using an electric arc furnace, of the steelmaking additive compositions of the invention to the charge subsequent to the initial scrap steel melt down.

Method of refining molten iron

전로형 정련 용기에 용선과 냉철원을 장입하고, CaO를 주성분으로서 함유하는 부 원료를 산소원과 함께 공급하여, 해당 냉철원을 용해하는 동시에 용선의 탈규 처리를 실행하고, 다음에 중간 배재로서, 탈규 처리에 의해서 생성된 슬래그의 적어도 일부를 배재하고, 계속해서 상기 전로형 정련 용기내의 용선에 조재제와 산소원을 공급하여 탈린 처리를 실행하는 용선의 정련 방법에 있어서, 상기 탈규 처리시에, 상기 전로형 정련 용기에, 규소 함유 물질 혹은 규소 함유 물질과 탄재를 열원으로서 첨가하여, 탈규 처리 종료시의 슬래그의 염기도(mass%CaO/mass%SiO 2 )를 0.5이상, 1.5이하, 탈규 처리 종료시의 용선 온도를 1280℃ 이상, 1350℃ 이하로 하는 조건하에 탈규 처리를 실행하고, 다음에 상기 중간 배재에 있어서 상기 탈규 처리에서 생성한 슬래그의 30mass%이상의 슬래그를 상기 전로형 정련 용기로부터 배재한다. A molten iron and a cold iron source are charged into a converter type refining vessel and a subsidiary raw material containing CaO as a main component is supplied together with an oxygen source to dissolve the hot iron source and to carry out a degassing treatment of the molten iron, A refining method of molten iron for discharging at least a part of slag produced by the degasification treatment and subsequently carrying out a tallin treatment by supplying a coagulant and an oxygen source to a molten iron in the converging refining vessel, (Mass% CaO / mass% SiO 2 ) of the slag at the completion of the degassing treatment is set to 0.5 or more and 1.5 or less, and at the time of completion of the degassing treatment, the silicon content or the silicon- Degassing treatment is carried out under the condition that the molten iron temperature is 1280 캜 or higher and 1350 캜 or lower, and then 30% by mass or less of the slag generated in the above- It is excluded on the slag from the converter type refining vessel.

A kind of high-efficiency steel-smelting process

本发明涉及冶炼技术领域，尤其涉及一种高效炼钢工艺方法，其包括如下步骤：——精料入炉；——高废钢比、热平衡装入；——变枪变压供氧技术；——终点采用投弹测温定碳技术；——优化出钢工艺，改变转炉倒渣工艺流程。本发明提供的工艺方法效率高、成本低、过程不喷溅、不返干、吹炼平稳。

Controlled foamy slag process

A method of improving the post-combustion heat recovery in a basic oxygen furnace by controllably forming a foamy slag. The foamy slag is generatedby increasing the lance height and reducing the rate of lance height reduction during the oxygen blowing cycle. The foamy slag is controlled to prevent slopping by calculating the approximate starting point of the peak decarburization periodfor the charge and then adjusting the oxygen flow rate to be at a minimum at thecommencement of the peak decarburization period.

Method and device for determining the foam slag heights during the fresh process in a blow steel converter

Verfahren zur Bestimmung der Schaumschlackenhöhen beim Frischvorgang in einem Blasstahlkonverter (1), wobei als Kenngröße für die aufschäumende Schlacke (9, 9') die Schallemissionen (8) des Blasstahlkonverters (1) im Bereich des Konvertermundes (3) mit Hilfe eines Mikrofons (11) aufgenommen und entsprechend ausgewertet werden, dadurch gekennzeichnet, dass zur Charakterisierung der Schaumschlackenhöhen (9') die emittierten höheren Schallfrequenzen oberhalb von 1 kHz genutzt werden.

Slag foaming suppression material, slag foaming suppression method, and converter furnace blowing method

爐渣起泡鎮靜材含有50質量%以上的氫氧化物，且該爐渣起泡鎮靜材的吸熱量在1800J/g以上。爐渣起泡鎮靜方法係將該爐渣起泡鎮靜材投入用以排渣爐渣的排渣鍋槽中。轉爐吹煉方法係在對被裝入1座轉爐中的熔鐵進行脫Si吹煉及脫P吹煉後、或在對被裝入2座以上轉爐之中至少1座轉爐中的熔鐵進行脫Si吹煉後，傾倒轉爐，在使熔鐵留於該轉爐內的狀態下將轉爐內的爐渣從爐口排渣時，採用前述爐渣起泡鎮靜方法，並於排渣後對轉爐內的熔鐵進行脫C吹煉。

METHOD FOR PRODUCING STEEL AND HYDRAULICALLY ACTIVE BINDERS

The process for making steel and hydraulically active binders uses slags rich in iron oxide, such as steel slag, as oxidizing agent for carbon in pig iron. The slag is reduced, yielding a type of blast furnace slag with improved hydraulic properties.

탈류 기능을 포함하는 다목적 열원 보상용 함철 단광, 이의 제조방법 및 이를 이용한 전로 취련 공법

본 발명은 탈류 기능을 포함하는 다목적 열원 보상용 함철 단광, 이의 제조방법 및 이를 이용한 전로 취련 공법에 관한 것으로, 보다 상세하게는 제철소의 제강 공장에서 철원 공급원으로 사용하는 함철 단광에 탈류 기능과 열원 보상 기능을 추가한 다목적 단광으로서, 용선 사용조건 및 제철 부산물에 포함되는 유해 성분인 황 성분에 구애 받지 않고 안정적으로 함철 단광을 사용하여 효율성과 수익성을 향상시킬 수 있는 다목적 열원 보상용 함철 단광, 이의 제조방법 및 이를 이용한 전로 취련 공법에 관한 것이다.

Metodo per ricoprire il rivestimento refrattario di un forno di fusione metallurgico con um materiale termoresistente.