MOLTEN MANGANESE-CONTAINING STEEL PRODUCTION METHOD, HOLDING FURNACE, AND MOLTEN MANGANESE-CONTAINING STEEL PRODUCTION EQUIPMENT USING HOLDING FURNACE

A manganese-containing molten steel production method comprises: a preparation step in which a molten ferroalloy or a molten non-ferrous metal is prepared by carrying out denitrification or nitrogen-absorption prevention during a procedure of retaining the molten ferroalloy or molten non-ferrous metal, in order to prevent later processing or additional denitrification due to nitrogen absorption; a maintaining step in which the molten ferroalloy or molten non-ferrous metal is maintained at a temperature at or above the melting point thereof; and a united pouring step in which the molten ferroalloy or molten non-ferrous metal is subjected to united pouring together with pre-prepared molten steel. In the present invention, while the maintaining step is being carried out, so too is a nitrogen-absorption prevention or denitrification step in which the molten ferroalloy or molten non-ferrous metal is subjected to nitrogen-absorption prevention or denitrification. 1. A method of producing molten manganese-containing steel , the method comprising:preparing a molten ferroalloy or a molten nonferrous metal;maintaining the molten ferroalloy or the molten nonferrous metal at a temperature equal to or higher than a melting point thereof; andpouring the molten ferroalloy or the molten nonferrous metal into prepared molten steel,wherein in the maintaining of the molten ferroalloy or the molten nonferrous metal, the molten ferroalloy or the molten nonferrous metal is subjected to a nitrogen-absorption prevention process or a denitrification process.2. The method of claim 1 , wherein the maintaining of the molten ferroalloy or the molten nonferrous metal is carried out in a holding furnace together with the nitrogen-absorption prevention process or the denitrification process claim 1 , andthe nitrogen-absorption prevention process or the denitrification process comprises supplying argon (Ar) gas to the holding furnace as an atmospheric gas to maintain an interior of the holding ...

ELECTROMAGNETIC INDUCTION FURNACE AND USE OF THE FURNACE FOR MELTING A MIXTURE OF METAL(S) AND OXIDE(S), SAID MIXTURE REPRESENTING A CORIUM

An electromagnetic induction furnace which is intended to melt at least one electrically conductive material, such as an oxide and/or a metal, and which includes at least one inductor having at least one turn and at least one cooling circuit suitable for cooling at least the inductor. Said furnace is characterized in that the heat-transfer fluid of at least one cooling circuit is supercritical CO2. The invention also relates to a method for operating the furnace and to the use thereof for melting a mixture of metals (steel, zirconium, etc.) with oxides (uranium UO2, zirconium, etc.), as well as concrete components, the mixture representing a corium. 1. An electromagnetic induction furnace intended to melt at least one electrically conductive material , comprising at least one inductor having at least one turn and at least one cooling circuit suitable for cooling at least the inductor , wherein the heat transfer fluid of at least one cooling circuit is supercritical CO.2. The furnace as claimed in claim 1 , comprising at least one inductor having at least two consecutive turns claim 1 , the winding directions of which are reversed by forming a loop in order to reverse the direction of the electric current that passes through them claim 1 , so as to form a levitation furnace.3. The furnace as claimed in claim 1 , comprising a crucible for containing the material to be melted.4. The furnace as claimed in claim 3 , comprising a cooling circuit suitable for cooling the walls of the crucible.5. The furnace as claimed in claim 4 , wherein the walls of the crucible are made of an electrically conductive material so as to form a cold-crucible furnace.6. The furnace as claimed in the walls of the crucible or self-crucible comprising a bottom claim 3 , referred to as the floor.7. The furnace as claimed in claim 6 , wherein the floor is removable.8. The furnace as claimed in claim 6 , wherein the floor comprises one or more through-orifices for discharging at least the molten ...

Method, apparatus, and computer-readable medium for carburization

Presented is a method, apparatus, and computer-readable medium for carburization. A method includes creating a vacuum within an interior of a chamber, the interior of the chamber including an item, the item having a first portion and a second portion, and providing an inert gas and a carbon product to the interior of the chamber. The method further including heating by induction the first portion of the item to induce carburization of the first portion of the item, and in response to the heating, cooling a second portion of the item such that the second portion of the item maintains its structural integrity.

Npr non-magnetic steel material for rock bolt and production method thereof

An NPR non-magnetic steel material for rock bolt and a production method thereof are disclosed. The NPR non-magnetic steel material for rock bolt has a composition, in weight percent, consisting of: C: 0.4-0.7%, Mn: 15-20%, Cr: 1-18%, Si: 0.3-3%, Ca: 0.05-0.15%, Cu: ≤0.03%, Ni: ≤0.02%, S: ≤0.001%, P: ≤0.001%, and the rest being Fe and unavoidable impurity elements. The NPR non-magnetic steel material for rock bolt and the production method thereof effectively solve the problems of steel materials for rock bolt in the prior art such as strong magnetism, low tensile strength and low effective elongation. The NPR non-magnetic steel material for rock bolt has a fully-austenitized structure and is non-magnetic, its yield strength is adjustable in the range of 600-1000 MPa, and its elongation is adjustable in the range of 20-60%.

APPARATUS FOR INDUCING FLOW IN A MOLTEN MATERIAL

The apparatus includes a furnace having a furnace chamber (), a port () in fluid communication with the furnace chamber having an inclined lower wall (), and a bi-directional induction unit () mounted to the inclined lower wall for inducing flow in molten material in the port. A retractable channel plate assembly () is selectively positionable in the port to define an extraction flow channel () for the molten material between the channel plate assembly and the inclined lower wall. A drive arrangement () moves the channel plate assembly into and out of the port and the control of a control system () which includes a sensor system () for measuring the level of the molten material in the port and a feedback system for providing information regarding the position of the channel plate assembly. A method of operating the apparatus is also disclosed. 1. Apparatus for inducing flow in a molten material , the apparatus comprising a furnace having a furnace chamber , a port in fluid communication with the furnace chamber and having an inclined lower wall , a bi-directional induction unit mounted to the inclined lower wall of the port for inducing flow in molten material in the port , a retractable channel plate assembly selectively positionable in the port to define an extraction flow channel for the molten material between the channel plate assembly and the inclined lower wall , a drive arrangement for moving the channel plate assembly into and out of the port , a control system for controlling the drive system , the control system including a sensor system for measuring the level of the molten material in the port and a feedback system for providing information regarding the position of the channel plate assembly.2. Apparatus as claimed in claim 1 , in which the apparatus can be operated in an extraction mode to extract molten material from the furnace chamber through the port claim 1 , the control system being configured when operated in the extraction mode to advance the ...

Methods for utilizing olefin coke in a steel making process and products made therefrom

Disclosed herein are methods and compositions for producing reduced carbon footprint steel compositions comprising providing a molten steel having a carbon content; and introducing a carbon containing agent into the molten steel; wherein at least a portion of the carbon containing agent comprises a reclaimed olefin coke.

METHOD FOR HOMOGENIZING STEEL COMPOSITIONS

This disclosure describes methods for improving the performance and consistency of steels by closely controlling the initial homogenization of steel compositions prior to hot working. Experimental data is provided illustrating that the traditional austenitization techniques do not take into account diffusion of the various components within a steel composition and, as such, may not completely homogenize the steel composition. In the methods described in this disclosure, the initial step of austenitizing the steel ingot is altered to achieve a more homogenous distribution of the different components throughout the ingot. The improved method includes heating the steel composition to a temperature within the upper half of the pure austenitic phase temperature range and maintaining the steel composition at that temperature for a period of time determined based on the diffusivity in the austenitic phase of the steel composition of at least one constituent of the steel. 1. A method for homogenizing a steel composition comprising:melting a plurality of components to make the steel composition having an austenitic phase temperature range having an upper limit, each component having a diffusivity;heating the steel composition to a first temperature within the upper half of the pure austenitic phase temperature range;maintaining the steel composition at the first temperature for a first period of time determined based on the diffusivity in the austenitic phase of the steel composition of at least one of the plurality of components; andworking the steel composition.2. The method of claim 1 , wherein the first temperature is selected to be within the upper 25% claim 1 , upper 20% claim 1 , upper 15% claim 1 , upper 10% claim 1 , upper 5% or the upper 1% of the austenitic phase temperature range.3. The method of claim 1 , wherein the first temperature is selected to be 5 claim 1 , 10 claim 1 , 15 claim 1 , or 20° C. less than the upper limit of the calculated austenitic phase ...

DEVICE AND METHOD FOR TREATING METALLIC MATERIALS

A device and a method for treating metallic material. In particular, the invention is suitable for treating and/or producing steel and metallic alloys, in particular non-standard grade steels and alloys of particularly high quality. The invention has proved to be particularly successful in the treatment of iron-based metallic materials. 1. A device for treating metallic material , comprising:a mobile melting vessel and at least one treatment station, whereinthe mobile melting vessel comprises a crucible, a heating induction facility with a coil and a housing,the treatment station comprises a cover which is suitable for gas-tightly closing the crucible, andthe mobile melting vessel can be separated from the treatment station and can be moved in a ridable manner independently from the treatment station, whereinthe device comprises a quick-coupling system so that supply lines of the treatment station can be connected to the mobile melting vessel for cooling the heating induction facility and/or for supplying it with electricity,a transport facility is provided which is suitable for moving the melting vessel out of the area of the treatment station, andmeans at or in the transport facility and/or the mobile melting vessel are provided for cooling the heating induction facility during the movement of the melting vessel and/or for supplying it with electricity.2. The device according to claim 1 , wherein the transport facility and/or the melting vessel comprise a cooling unit and/or a power generator for cooling the coil during the transport and/or for supplying it with electricity.3. The device according to claim 1 , wherein the transport facility is a towing vehicle.4. The device according to claim 1 , wherein the heating induction facility claim 1 , at least after coupling to the treatment station claim 1 , is suitable for maintaining metallic material which is located in the crucible in a molten state and/or melting it.5. The device according to claim 1 , wherein the ...

Hypereutectic white iron alloys comprising chromium and nitrogen and articles made therefrom

Disclosed are a hypereutectic white iron alloy and articles such as pump components made therefrom. Besides iron and unavoidable impurities the alloy comprises, in weight percent based on the total weight of the alloy, from 2.5 to 6.5 C, from 0.04 to 1.2 N and from 18 to 58 Cr and, optionally, one or more of Mn, Ni, Co, Cu, Mo, W, V, Mg, Ca, Si, rare earth elements, Nb, Ta, Ti, Zr, Hf, Al, B.

Electric induction heating and melting furnace refractory life cycle wear imaging and processing

Apparatus and method are provided for life cycle wear monitoring of a consumable refractory in an electric induction furnace used for heating and melting materials by accumulating laser imaging data of the refractory's inner surface periodically over the refractory's life cycle while the furnace is utilized in a foundry environment and processing the accumulated imaging data for comparative analysis with previous laser imaging data of the refractory's inner surface.

MOLTEN MANGANESE-CONTAINING STEEL PRODUCTION METHOD, HOLDING FURNACE, AND MOLTEN MANGANESE-CONTAINING STEEL PRODUCTION EQUIPMENT USING HOLDING FURNACE

When storing a molten ferroalloy or molten nonferrous metal, the molten ferroalloy or molten nonferrous metal is denitrified or prevented from absorbing nitrogen, and thus post processing such as a denitrification process may not be performed. For this, there is provided a method of producing molten manganese-containing steel, the method including: preparing a molten ferroalloy or a molten nonferrous metal; maintaining the molten ferroalloy or the molten nonferrous metal at a temperature equal to or higher than a melting point thereof; and pouring the molten ferroalloy or the molten nonferrous metal into prepared molten steel, wherein in the maintaining of the molten ferroalloy or the molten nonferrous metal, the molten ferroalloy or the molten nonferrous metal is subjected to a nitrogen-absorption prevention process or a denitrification process. 1. A holding furnace comprising:a case;an accommodation unit disposed in the case and comprising an internal space to accommodate a solid or molten ferroalloy or a solid or molten nonferrous metal;a heating unit configured to heat the ferroalloy or nonferrous metal contained in the accommodation unit; anda cover disposed on an upper side of the accommodation unit to close the internal space of the accommodation unit,wherein the cover comprises an atmospheric gas supply unit connected to an inert gas supply unit and supplying an atmospheric gas to the accommodation unit so that the ferroalloy or the molten nonferrous metal melted in the accommodation unit is denitrified or prevented from absorbing nitrogen.2. The holding furnace of claim 1 , wherein the heating unit comprises at least one of:an induction coil wound around the accommodation unit;an electrode bar disposed in the cover; anda plasma disposed in the cover.3. The holding furnace of claim 2 , further comprising a control unit connected to the heating unit claim 2 ,wherein the molten ferroalloy or the molten nonferrous metal is maintained at a temperature of 1300° C ...

Methods for utilizing olefin coke in a steel making process and products made therefrom

Methods and compositions for producing reduced carbon footprint steel compositions by providing a molten steel having a carbon content; and introducing a carbon containing agent into the molten steel. At least a portion of the carbon containing agent is a reclaimed olefin coke.

Smelting method and device

FIELD: metallurgy.SUBSTANCE: invention relates to the field of metallurgy and can be used to melt a metal-containing mixture. Smelting vessel comprises a refractory lined hearth and devices for draining molten slag and draining the molten metal, wherein the upper part of the hearth is in contact with the molten slag in the slag zone of the vessel, and the lower part of the hearth is in contact with the molten metal in the metal zone of the vessel, and a refractory lining cooler above the hearth, which is located completely around the top of the hearth. Cooler of the refractory lining of the upper part of the hearth is made in the form of heat pipes arranged in the refractory lining in the form of radially spaced rings.EFFECT: invention allows to significantly reduce the wear of the hearth lining due to the use of a wide range of refractory materials and to obtain operational benefits due to a wider selection of materials.31 cl, 8 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 682 192 C1 (51) МПК C21B 13/00 (2006.01) C21B 7/10 (2006.01) F27D 9/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК C21B 13/00 (2006.01); C21B 7/10 (2006.01); F27D 9/00 (2006.01) (21)(22) Заявка: 2016124760, 04.12.2014 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): Тата Стил Лимитед (IN) Дата регистрации: 15.03.2019 2008/0111287 A1, 15.05.2008. EP 1170385 A2, 09.01.2002. RU 2166162 C1, 27.04.2001. RU 2242520 С1, 20.12.2004. 06.12.2013 AU 2013904748 (45) Опубликовано: 15.03.2019 Бюл. № 8 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 06.07.2016 (86) Заявка PCT: (87) Публикация заявки PCT: WO 2015/081376 (11.06.2015) R U 2 6 8 2 1 9 2 Адрес для переписки: 191036, Санкт-Петербург, а/я 24 "НЕВИНПАТ" (54) СПОСОБ И УСТРОЙСТВО ДЛЯ ПЛАВЛЕНИЯ (57) Реферат: Изобретение относится к области металлургии полностью вокруг верхней части горна. и может быть использовано для плавления Охладитель огнеупорной ...

High-silicon medium-carbon wear-resistant cast steel and heat treatment method thereof

一种高硅中碳耐磨铸钢及其热处理方法，属于耐磨合金材料技术领域。铸钢化学组成及其质量分数为：0.42‑0.49％C，2.63‑2.75％Si，2.02‑2.19％Mn，1.88‑1.97％Cr，0.33‑0.38％N，0.31‑0.39％Al,0.0032‑0.0057％B，<0.03％S,<0.04％P,余量为Fe和不可避免的杂质。铸钢经900℃奥氏体化1h后随即进行320－350℃的等温淬火，保温时间2h，最后水冷至室温，即可获得贝氏体和残余奥氏体的复合组织，具有优良的力学性能和耐磨性，本发明铸钢主要合金元素为廉价的硅、锰，生产成本较低，推广应用具有显著的经济和社会效益。

Method of concentrates treatment from ore, containing oxides of ferric, titanium and vanadium and facility for its implementation

Изобретение относится к области металлургии, в частности, к способу переработки концентратов из руды, содержащей оксиды железа, титана и ванадия, и устройству для его осуществления. Технический результат заключается в увеличении извлечения ванадия в безуглеродистое железо (БЖ) и титаносодержащую лигатуру, реализации безотходной энергосберегающей, экологически чистой технологии. Способ осуществляют жидкофазным восстановлением металлов из оксидов порций концентрата, состоящих из основной и дополнительной частей, в условиях вращения расплава электромагнитным полем. При плавке полезно используют центробежный эффект, ускоренно расплавляют подаваемую на плавку шихту, содержащую концентрат, и восстанавливают в ней избирательно металлы из оксидов. При этом также ускоренно растворяют железо в алюминии при производстве ферроалюминия. Способ осуществляют почти без выделения газа из расплава. Устройство для осуществления способа снабжено накопителем оборотного ферросилиция, что упрощает процесс переработки шихты, сокращает время переработки каждой очередной порции шихты. Под днищем накопителя оборотного ферросилиция размещены индукционные единицы, которые по конструкции аналогичны индукционным единицам, размещаемым вокруг стенок и под днищем агрегата, что позволяет снизить расходы на изготовление индукционных единиц и расходы на электропитание. 2 н. и 4 з.п. ф-лы, 2 ил. ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß (19) RU (11) 2 350 670 (13) C2 (51) ÌÏÊ C22B 34/12 (2006.01) C22C 33/04 (2006.01) F27B 14/06 (2006.01) ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÎÏÈÑÀÍÈÅ ÈÇÎÁÐÅÒÅÍÈß Ê ÏÀÒÅÍÒÓ (21), (22) Çà âêà: 2006140777/02, 20.11.2006 (24) Äàòà íà÷àëà îòñ÷åòà ñðîêà äåéñòâè ïàòåíòà: 20.11.2006 (43) Äàòà ïóáëèêàöèè çà âêè: 27.05.2008 Àäðåñ äë ïåðåïèñêè: 620034, ã.Åêàòåðèíáóðã, óë. Òîëåäîâà, 43à, ÎÎÎ Ôèðìà "ÄÀÒÀ-ÖÅÍÒÐ", Â.Ç. Ìóðçàêàåâîé (73) Ïàòåíòîîáëàäàòåëü(è): ÎÁÙÅÑÒÂÎ Ñ ÎÃÐÀÍÈ×ÅÍÍÎÉ ÎÒÂÅÒÑÒÂÅÍÍÎÑÒÜÞ ÔÈÐÌÀ "ÄÀÒÀ-ÖÅÍÒÐ" (ÎÎÎ Ôèðìà "ÄÀÒÀ-ÖÅÍÒÐ") (RU) (54) ÑÏÎÑÎÁ ...

Method of steel making and device for its embodiment

FIELD: metallurgy. SUBSTANCE: method of steel making in submerged-resistor induction furnace includes heating of iron-containing burden and carbon-containing material, direct reduction and melting of iron-containing burden. Temperature of liquid product is maintained at the level exceeding the temperature of its liquids, preferably, by 50-100 C by regulating heat quantity supplied to furnace and/or rate of burden charging into furnace during reduction and melting processes. Liquid steel is discharged from furnace, preferably, at temperatures in the range from 1580 to 1620 with content of carbon about 0.1%. Method allows to exclude equipment for production of liquid pig iron due to direct reduction of iron-containing burden into steel in submerged-resistor induction furnace from burden containing reduced quantity of phosphorus to decrease flux consumption and to prolong service life of refractory lining. EFFECT: higher efficiency. 21 cl, 4 dwg сс с ПЧ ГЭ РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) ВИ” 2 127 321 (51) МПК (13) СЛ С 21С 5/52, С 21 В 13/12 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 94021346102, 15.06.1994 (30) Приоритет: 16.06.1993 ГА 93/4272 (46) Дата публикации: 10.03.1999 (56) Ссылки: Похвиснеев А.Н. и др. Внедоменное получение железа за рубежом. - М.: Металлургия, 1964, с. 257, 260 - 261. $ 1822417, АЗ, 15.06.93. ЗЦ 709688, А, 18.01.80. ЗЕ 360619, А, 01.10.73. ЗЕ 396227, А, 12.09.7Г. ЗЕ 396228, А, 12.09.77. 4$ 3235314 А, 15.02.66. Ц$ 4010029, А, 01.03.77. (98) Адрес для переписки: 103735, Москва, ул.Ильинка, 5/2, Союзпатент, Патентному поверенному Дудушкину С.В. (71) Заявитель: Ипкор ЕН ВЕ (М) (72) Изобретатель: Луис Йоханнес Фаури (7А) (73) Патентообладатель: Ипкор ЕН ВЕ (М) (54) СПОСОБ ПОЛУЧЕНИЯ СТАЛИ И УСТРОЙСТВО ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ (57) Реферат: Изобретение относится к области металлургии и позволяет исключить оборудование для получения жидкого чугуна за счет прямого — восстановления железосодержащей ...

Process for reducing the electric steelworksdusts and facility for implementing it

본 발명은 무코어형 저주파 유도로에서 전기 제강소 먼지 및 아연함유 철고함량 산화된 물질을 처리하는 공정에 관계하는 것으로 다음 결과를 가져온다: The present invention relates to a process for treating an electro-smelting furnace dust and zinc-containing steels content oxidized material in a low-frequency induction furnace with the following results: - 포함된 철산화물을 주조철로 환원; - reducing the iron oxides contained in cast iron; - 공정에서 회수된 연기(fume)에 비철금속산화물 농축; - Concentration of non-ferrous metal oxides in the fumes recovered from the process; - 덤프식으로 처리되기에 적합한 슬래그 형성. - Slag formation suitable for processing in dump form. 고온으로 유지되며 유도전류에 의해 빠르게 순환되는 주조철베스(bath)는 로의"환원지대"를 구성하며 그 내부에서 공급재료를 구성하는 금속산화물이 Zn, Pb, Cd, Fe로 환원된다. A cast iron bath maintained at a high temperature and rapidly circulated by an induction current constitutes a " reduction zone " of the furnace, in which the metal oxides constituting the feedstock are reduced to Zn, Pb, Cd and Fe. 공급원료(펠렛화된 제강소 먼지, 과립 석탄, 슬래그화제)에 의해 점유되는 조 커버층은 로의 산화지대를 구성하여 그 내부에서 석탄이 연소되어 CO를 생성하고 조를 떠나는 아연 및 기타 공급원료의 증기는 다시 산화되어 연기로 들어간다. The coarse cover layer occupied by the feedstock (pelletized steel mill dust, granular coal, slagging agent) constitutes the oxidizing zone of the furnace so that the coal inside it burns to produce CO and vapor of zinc and other feedstock leaving the furnace Is again oxidized and enters the smoke. 적절한 연기수집장치는 먼지를 모아서 공정시작시 초기 농도보다 두배이상으로 농축된 Zn, Pb, Cd 산화물을 회수한다. A suitable smoke collecting device collects dust to recover Zn, Pb, and Cd oxides that are more than twice the initial concentration at the beginning of the process.

Electromagnetic induction furnace and use thereof for melting mixture of metal(s) and oxide(s), said mixture representing corium

FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy and can be applied to the induction melting of any electrically conductive material, including a corium. Electromagnetic induction furnace comprises a crucible for containing a molten mixture and a cooling circuit for cooling the crucible walls with a heat transfer fluid that is supercritical CO. Method for cooling the furnace includes circulating supercritical COunder pressure in the range from its critical pressure Pc of the order of 73 bar to a pressure of 100 bar and at a temperature in the range from its critical temperature Tc of the order of 31 °C at the inlet of said at least one cooling circuit to a temperature of 50 °C at the outlet of said cooling circuit while providing specific heat Cp of supercritical COat least equal to 4 kJ kg. For melting the mixture in the furnace, alternating current is passed through the turns of at least one inductor, simultaneously at least at two different frequencies, one of which is suitable for melting said at least one metal and the other for melting said at least one oxide.EFFECT: invention makes it possible to create a cooling circuit with a heat transfer fluid that is not electrically conductive to prevent any interference due to electromagnetic induction.14 cl, 7 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 667 268 C2 (51) МПК F27B 14/06 (2006.01) H05B 6/32 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F27B 14/06 (2006.01); H05B 6/32 (2006.01) (21)(22) Заявка: 2015150290, 25.04.2014 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): КОМИССАРЬЯ А Л'ЭНЕРЖИ АТОМИК Э ОЗ ЭНЕРЖИ АЛЬТЕРНАТИВ (FR) Дата регистрации: 18.09.2018 (56) Список документов, цитированных в отчете о поиске: EP 0747648 A1, 11.12.1996. RU 26.04.2013 FR 13 53840 (43) Дата публикации заявки: 02.06.2017 Бюл. № 16 2039914 C1, 20.07.1995. JP 2006153362 А1, 15.06.2006. EP 2572815 A, 27.03.2013. RU 109281 U1, 10.10. ...

Patent SU334794A1

Device and method for producing metals or metal compounds

FIELD: metallurgy. SUBSTANCE: device includes a housing with a first inlet for feeding of material and the first outlet for removing the waste gas, the first electrode is provided in the housing as an anode and the second electrode as a cathode for electric heating of the material located in the building as well as an outlet for the extraction of molten metal or metal compound and the overflow drain hole for slag discharge. A hole for feeding of the slag is provided, through which the slag which can be fed into the interior of the body, as well as an opening for feeding a reducing agent. The material is injected into the device and is melted there with introduction of electrical energy through electrical resistance heating or heating with an electric arc. EFFECT: invention improves recovery rate of metal or metal compound from the slag and solid phases of melting of nonferrous metals and alloys, as well as from the solids with a low content of base metal. 13 cl, 4 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 455 599 (13) C2 (51) МПК F27B 3/08 (2006.01) F27D 11/00 (2006.01) F27D 3/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2010129916/02, 11.12.2008 (24) Дата начала отсчета срока действия патента: 11.12.2008 (73) Патентообладатель(и): СМС ЗИМАГ АГ (DE) R U Приоритет(ы): (30) Конвенционный приоритет: 18.12.2007 DE 102007061025.6 02.05.2008 DE 102008021886.3 (72) Автор(ы): ДЕГЕЛЬ Рольф (DE), ОТЕРДОМ Хармен Иоганнес (DE), КУНЦЕ Юрген (DE) (43) Дата публикации заявки: 27.01.2012 Бюл. № 3 2 4 5 5 5 9 9 (45) Опубликовано: 10.07.2012 Бюл. № 19 2 4 5 5 5 9 9 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 19.07.2010 C 2 C 2 (56) Список документов, цитированных в отчете о поиске: ЕР 1375628 А2, 02.01.2004. ЕР 0714860 А1, 05.06.1996. US 4110546 A, 29.08.1978. RU 2207476 C2, 27.06.2003. ГАСИК М.И. и др. Теория и технология производства ферросплавов. - М.: Металлургия, 1988, с.140142. (86) ...

Molten metal injection device for metal melting furnace

본 발명은 금속 융해로용 용융금속 주입장치에 관한 것으로, 보다 상세하게는 유입부재 및 토출부재가 배치된 버킷을 포함하는 금속 융해로용 용융금속 주입장치에 관한 것이다. 이러한 본 발명에 따르면, 드로스를 제외한 순수 금속으로 이루어진 용융금속을 신속하게 유도가열기 측으로 주입할 수 있는 용융금속 주입장치를 제공할 수 있다는 장점이 있다. The present invention relates to a molten metal injection device for a metal melting furnace, and more particularly, to a molten metal injection device for a metal melting furnace including a bucket in which an inlet member and a discharge member are disposed. According to the present invention, there is an advantage in that it is possible to provide a molten metal injection device capable of rapidly injecting molten metal made of pure metal excluding dross to the induction heater side.

DEVICE FOR REMOVING METALS OR COMPOUNDS OF METALS FROM MATERIAL CONTAINING METAL OR COMPOUND OF METALS

1. Устройство для извлечения металлов или соединений металлов из содержащего металл или соединение металла материала с металлоприемником (2) в печи, с первым впуском для загрузки материала, первым выпуском (10) для отвода отработанного газа, с зоной электрической восстановительной печи, с одним или несколькими обычным образом работающими в режиме переменного тока, переключаемыми в качестве опции на режим работы постоянного тока электродами (1) для плавления и/или восстановления загруженного материала, которые выступают в металлоприемник печи, предусмотренным в зоне выпуска (12) шлаков, служащим в качестве зоны осаждения пространством (16), с подовым электродом (5), образованным в качестве катода, между которым и опциональным электродом (4) или в качестве опции переключаемых на режим постоянного тока электродами может быть создан магнитный поток, обусловленный постоянным током, и с электро- или постоянными магнитом (6), который таким образом установлен в металлоприемнике печи, что созданный в металлоприемнике магнитный поток, обусловленный постоянным током, пересекается этим магнитным полем, так что с помощью наложенных потоков, магнитного потока, обусловленного током, и магнитного поля, получающиеся в результате этого силы приводят в движение находящуюся в печи среду таким образом, что в комбинации получается эффект перемешивания, а также с выпуском (8) для отбора расплавленного металла или соединения металла и переливом или выпуском (12) для шлаков. ! 2. Устройство по п.1, отличающееся тем, что опциональный электрод (4) расположен в зоне пространства (16), служащего в качестве зоны осаждения. ! 3. Устройство по п.1, отлича� РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2010 129 525 (13) A (51) МПК F27B 3/08 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (71) Заявитель(и): СМС СИМАГ АГ (DE) (21)(22) Заявка: 2010129525/02, 17.12.2008 (43) Дата публикации заявки: 27.01.2012 Бюл. № 3 (72) Автор(ы): КЁНИХ Роланд (DE), ДЕГЕЛЬ Рольф (DE), ...

METHOD FOR PROCESSING CONCENTRATES FROM ORE CONTAINING IRON, TITANIUM AND VANADIUM OXIDES AND DEVICE FOR ITS IMPLEMENTATION

ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß (19) RU (11) 2006 140 777 (13) A (51) ÌÏÊ C22B 9/00 (2006.01) ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÇÀßÂÊÀ ÍÀ ÈÇÎÁÐÅÒÅÍÈÅ (21), (22) Çà âêà: 2006140777/02, 20.11.2006 (43) Äàòà ïóáëèêàöèè çà âêè: 27.05.2008 Áþë. ¹ 15 A 2 0 0 6 1 4 0 7 7 7 (57) Ôîðìóëà èçîáðåòåíè 1. Ñïîñîá ïåðåðàáîòêè êîíöåíòðàòîâ èç ðóäû, ñîäåðæàùåé îêñèäû æåëåçà, òèòàíà è âàíàäè , âêëþ÷àþùèé ïëàâêó ïîðöèé øèõòû â ïëàâèëüíîé êàìåðå ýëåêòðîïëàâèëüíîãî àãðåãàòà íà æèäêîé âðàùàþùåéñ ìåòàëëè÷åñêîé ïîäëîæêå è îáðàçîâàíèå øëàêà, æèäêîôàçíîå âîññòàíîâëåíèå æåëåçà è äðóãèõ ìåòàëëîâ èç øëàêà âîññòàíîâèòåëåì, îáðàçîâàíèå äðóãèõ øëàêîâûõ ôàç è ïîïîëíåíèå âîññòàíîâëåííûìè ìåòàëëàìè âðàùàþùåéñ ìåòàëëè÷åñêîé ôàçû, äîâîäêó ìåòàëëè÷åñêîé è øëàêîâîé ôàç äî çàäàííûõ õèìè÷åñêèõ ñîñòàâîâ, ñëèâû ôàç èç ïëàâèëüíîé êàìåðû ïëàâèëüíîãî àãðåãàòà, îòëè÷àþùèéñ òåì, ÷òî ïîðöèè øèõòû ïëàâ ò èç êîíöåíòðàòà òèòàíîìàãíåòèòîâîé ðóäû, êîòîðûå âêëþ÷àþò îñíîâíóþ è äîïîëíèòåëüíóþ ÷àñòè, æåëåçî è ÷àñòü âàíàäè èç îñíîâíîé ÷àñòè ïîðöèè êîíöåíòðàòà âîññòàíàâëèâàþò êðåìíèåì, ñîäåðæàùèìñ â ìåòàëëè÷åñêîé ôàçå - ïîäëîæêå, ïîäëîæêó ïðè ýòîì îñâîáîæäàþò îò êðåìíè , óñòàíîâëåííîå êîëè÷åñòâî ïîëó÷åííîãî áåçóãëåðîäèñòîãî æåëåçà èç ïëàâèëüíîé êàìåðû ïëàâèëüíîãî àãðåãàòà ñëèâàþò, à îñòàòîê ñïëàâë þò ñ ìåòàëëàìè, êîòîðûå ïîëó÷àþò ïîñëå âîññòàíîâëåíè àëþìèíèåì îêñèäîâ òèòàíà, ìàðãàíöà, êðåìíè , îñòàòêà îêñèäà âàíàäè èç îñíîâíîé ÷àñòè ïîðöèè êîíöåíòðàòà è èç îêñèäà êðåìíè , êîòîðûé ïåðåøåë â øëàêîâóþ ôàçó ïîñëå âîññòàíîâëåíè æåëåçà êðåìíèåì èç ýòîé ÷àñòè ïîðöèè êîíöåíòðàòà, øëàê ñ íå âîññòàíîâëåííûìè àëþìèíèåì îêñèäàìè, ïîïîëíåííûé îêñèäàìè àëþìèíè è êàëüöè , ïîëíîñòüþ ñëèâàþò èç ïëàâèëüíîé êàìåðû ïëàâèëüíîãî àãðåãàòà, ïîëó÷à ïåðâóþ ïîðöèþ ïëàâèëüíîãî êëèíêåðà äë ïðîèçâîäñòâà öåìåíòà èëè èçâëå÷åíè èç íåãî ãëèíîçåìà, òèòàíîì èç âíîâü îáðàçîâàííîé ïîäëîæêè âîññòàíàâëèâàþò æåëåçî èç äîïîëíèòåëüíîé ÷àñòè ïîðöèè êîíöåíòðàòà, ïîëó÷à ïðè ýòîì ôåððîñèëèöèé, ñ äîáàâêîé âàíàäè , è øëàê, ...

A kind of induction furnace and RH-OB duplex techniques

在生产铸钢件和电渣用的高合金钢时，本申请提供一种感应炉与RH‑OB双联工艺。即：通过采用感应炉将废钢升温熔化，然后在感应炉上下降RH‑OB真空设施，将感应炉中的钢水在RH‑OB真空室内进行脱碳、造渣、脱磷、脱硫、脱氧、脱气、合金化的炉外精炼双联工艺过程；充分利用感应炉快速熔炼、温度控制精确、合金收得率和金属收得率高的优点，又与RH‑OB真空处理系统结合，实现废钢经感应炉初炼后，在线进行脱碳、造渣、脱磷、脱硫、脱氧、脱气和合金化的全新冶炼工艺流程。在生产优特钢和铸钢件、电渣用的高合金钢时，该工艺扩大了感应炉用料范围，且操作方便，投入较小，运行成本较低，除尘效果良好，是一种环保、节能的生产工艺，省去了RH‑OB炉单独工作所需要的厂房和人员的投资，极大降低生产成本。

Standard sample for spectrochemical analysis steel production technology and apparatus for pouring thereof

本发明公开了一种光谱标样用钢生产工艺及其浇注装置，在中频炉内通过冶炼前优化加料顺序、过程中熔渣脱氧、合金化分批分类加入等工艺，冶炼出成分合格的标样用钢；在浇注过程中控制钢水浇注温度和浇注装置烘烤，在水平浇注装置上浇注出组织致密无疏松、缩孔等缺陷的铸锭；在凝固结晶过程中快速冷却，减少铸锭凝固过程中造成的偏析。该工艺的冶炼周期控制在2.5小时内，特别适合于大批量合金元素的标样用钢；生产的铸锭致密、无疏松缩孔，大幅提高了产品的产量和质量；铸锭的快冷工艺使钢中成分偏析大幅降低，整个生产工艺解决了多达20多项元素的标样用钢的成分控制和成分偏析两大难题，对冶金标样用钢的生产具有重要的实用价值。

Process for smelting precise or special alloy by multi-slag method in medium-frequency induction furnace for desulfurization and oxygen removal

本发明公开了一种中频感应炉多渣法冶炼精密或特种合金脱硫、氧工艺，其特征是：中频感应炉炉容量小于等于6吨，装入炉内的金属原材料必须清洁、无锈，纯铁以铸棒的形式插入炉内。在一炉钢的冶炼中，重复造新渣的总次数达二次或二次以上，每次造渣需扒清熔池表面结壳渣、流渣部分，并留下一层能覆盖钢液面的薄渣层再及时造新渣。炉渣碱度为3‑3.6，按要求进行沉淀和扩散脱氧。精炼期钢水温度控制为1590℃‑1610℃，出钢温度控制为1610℃‑1630℃。钢水倒入盛钢桶后，先吹Ar搅拌，然后在Ar气保护装置下浇注成钢锭。本工艺可显著降低钢中的硫、氧含量，成功地冶炼用于冷或热加工的精密或特殊合金等高端金属产品。

A kind of intermediate experiment method of smelting silicon steel

一种冶炼硅钢的中间试验方法，属于真空感应炉炼钢技术领域。包括在冶炼的坩埚清洁无破损修补，合炉抽真空5～8min送电熔化，精炼前期利用真空下C脱氧，向钢液中加入金属硅元素，充氩保护，分两次加Al，第一次加Al:0.035～0.045wt％预脱氧，然后合金化，温度符合出钢要求，第二次加余Al量,出钢前倾炉，锭模上部安装保温帽，并加入发热剂，出钢后破空。优点在于，有效提高了钢的纯净度，达到了真空感应炉中间试验高牌号无取向硅钢的冶炼目的。

Patent FR2115347B1

Melting apparatus and method with electrode holder

Melting iron/steel - in acid lined converters by induction heating

Iron alloys are fused in acid-lined convertors heated in an induction furnace, whereby the conventional process of adding carbon to the crude iron is at least partially replaced by carburation within the induction furnace. Stricter control of the properties of the molten metal is achieved and a higher percentage of scrap steel can be used for adjusting the composn.

OVEN FOR THE PREPARATION AND CASTING OF ALLOYS

L'invention concerne un four pour la préparation et de coulée d'alliages. Ce four comporte une chambre de travail 1 ayant un garnissage et un revêtement extérieur 2, des réchauffeurs 4, disposés sous la voûte du four, une conduite de métal 5 pour la coulée d'un métal et un inducteur 9 du champ magnétique progressif monté à la face extérieure de la chambre de travail 1. La conduite de métal 5 est constituée par deux brins, un brin inférieur 6 et un brin supérieur 7. Une cloison 8 est montée au-dessus du brin supérieur 7 de la conduite de métal 5. L'inducteur 9 est composé de deux sections 10, 11 disposées au-dessous des brins inférieur 6 et supérieur 7 de la conduite de métal 5. L'invention est notamment appliquée à la production de l'aluminium et de ses alliages ainsi que d'alliages de cuivre, de zinc, de plomb, de fer et d'autres métaux. The invention relates to a furnace for the preparation and casting of alloys. This furnace comprises a working chamber 1 having a lining and an external coating 2, heaters 4, arranged under the vault of the furnace, a metal pipe 5 for the casting of a metal and an inductor 9 of the progressive magnetic field mounted at the outer face of the working chamber 1. The metal pipe 5 consists of two strands, a lower strand 6 and an upper strand 7. A partition 8 is mounted above the upper strand 7 of the metal pipe 5. The inductor 9 is made up of two sections 10, 11 arranged below the lower 6 and upper 7 strands of the metal pipe 5. The invention is particularly applied to the production of aluminum and its alloys as well as to alloys of copper, zinc, lead, iron and other metals.

Pressure treatment of a molten bath and device for carrying out this process

ELECTROMAGNETICALLY INDUCED HEATING FURNACE, USE OF THE OVEN FOR FUSION OF A MIXTURE OF METAL (UX) AND OXIDE (S) REPRESENTATIVE OF A CORIUM

METHOD FOR REFLECTING METALLIC MATERIALS WITH INCLUSIONARY DECANTATION

Dans le procédé de refusion de matériaux métalliques et plus particulièrement de superalliages à base de nickel, l'opération de fusion est réalisée en plaçant les alliages dans un creuset sectorisé en cuivre refroidi ou creuset froid et au moyen d'inducteurs électromagnétiques. Un champ magnétique appliqué à la masse de métal en fusion a une fréquence comprise entre 50 Hz et 5 X 10**6 Hz et préférentiellement entre 5 X 10**3 Hz et 5 X 10**5 Hz de manière à assurer à la fois un brassage électromagnétique du métal liquide et une concentration en surface le long des parois froides de la masse à refondre de toutes les particules non conductrices constituées notamment des inclusions céramiques, de manière à obtenir une décantation inclusionnaire. In the process for remelting metallic materials and more particularly nickel-based superalloys, the melting operation is carried out by placing the alloys in a sectorized crucible of cooled copper or cold crucible and by means of electromagnetic inductors. A magnetic field applied to the mass of molten metal has a frequency between 50 Hz and 5 X 10 ** 6 Hz and preferably between 5 X 10 ** 3 Hz and 5 X 10 ** 5 Hz so as to ensure the both an electromagnetic stirring of the liquid metal and a surface concentration along the cold walls of the mass to be remelted of all the non-conductive particles consisting in particular of ceramic inclusions, so as to obtain an inclusion settling.

Electric induction furnace for continuous steel making - on an industrial scale, esp. using scrap and pre-reduced ores

Electric induction furnace for the continuous melting of metal, esp. steel, starting from scrap and pre-reduced ores, uses a ring-shaped or annular crucible which constitutes a single sec. turn in short circuit with several transformers, the prim. of each transformer being fed with alternating current and mounted on a magnetic frame through which the ring crucible passes, the frames being distributed at regular intervals round the ring crucible. The crucible is pref. fitted with means subjecting the melt to a magnetic induction sufficient for at least partial saturation, esp. by using bobbins round the ring crucible. The furnace is completely static, i.e. no tilting is required and it is very suitable for the recently developed steel making processes, avoiding the inconvenience which occurs in using arc melting furnaces.

Dephosphorization slag

SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEEN Laitier de déphosphoration Laitier de déphosphoration, en particulier sous la forme d’une poudre, ledit laitier présentant la composition chimique moyenne suivante en pourcentages massiques sur la base de la matière sèche : - CaO : entre 25% et 45%, et - Al2O3 : entre 5% et 15%, et - Fe2O3 : entre 3% et 20%, et - Na2O : entre 4% et 20%, et - SiO2 : moins de 18%, et - Fluor (F) : moins de 1,8%, et - MgO : moins de 4%, et - BaO : moins de 1%, et- autres constituants < 2,0%. - perte au feu : complément à 100% Pas de figure d’abrégé

Improvement in metallurgical processes using the induction furnace

Process for the production of spheroidal graphite steel

Patent FR2297916B1

Shaft furnace for melting iron scrap or sponge - with tap hole leading to second furnace or heated channel

Device for melting scrap iron or shot, sponge iron or other material in a shaft furnace in counter-current to a central fuel/oxygen flame from one or more burners below the column of the charged materials in the shaft, and with a tap-hole (i) in the hearth for the melt. A slag tap-hole (II) is provided above the hearth, whereas tap-hole (I) functions as an indirectly heted siphon for the liw. metal; and the slag layer and tap-hole (II) are located in the zone of the iron shell which supports the column of charged materials. The siphon may be heated, esp. by induction and the siphon may lead to an electric arc furnace, in which case tap-hole (II) is branched, one branch leading to the arc furnace. Continuous removal of aggressive slags, reducing the wear of the shft furnace lining.

Method of regulating the temperature of the furnaces

Patent FR2347444B1

METALLURGICAL TREATMENT PROCESS.

Patent FR2134664A1

Improvements in metallurgical processes using the induction furnace

Method and apparatus for strirring molten metal using electromagnetic field

A találmány tárgya eljárás fémolvadék metallurgiai üstben történőkezelése során, elektromágneses mezővel folytatott keverésére,amelynek során függőleges elhelyezkedésű metallurgiai üstbenfémolvadékot állítanak elő, tűzálló bélés alkotta falak között, éslényege, hogy az üst kerülete mentén, egyrészt függőlegesenelhelyezett tűzálló anyagból készített oszlop, másrészt függőlegessíkban elhelyezkedő központi résszel ellátott, tűzálló falazat közöttfémolvadék-járatot alakítanak ki, továbbá a járatot, az üstben lévőfémolvadék fő tömegével áramlási összeköttetésbe hozzák, és ezzellehetővé teszik a fémolvadék, alapvetően vízszintes irányú, laminárisáramlását a tűzálló oszlop, és a tűzálló falazat között úgy, hogy azáramlást a járatba, továbbá a járaton át vezetik, végül a járatbólvisszavezetik az üstben lévő fémolvadék fő tömegéhez, továbbá azeljárás során hosszúkás, központi elhelyezkedésű hossztengelyéhezviszonyítva szimmetrikus elrendezésű, mágnesesen áteresztő magot,valamint számos, elektromosan vezető menetet helyeznek el egymássalegyvonalban, a hosszúkás mag mentén, továbbá ciklikusan létrehozottmágneses fluxus erővonalaival hatnak a fémolvadékra, és ezzellétrehozzák a vízszintes irányú, lamináris áramlást a járatban úgy,hogy a sorban elhelyezkedő menetekre ható váltakozó elektromos árammalgerjesztett mágneses fluxus erővonalait, a járatban lévő fémolvadékrakoncentrálják, továbbá függőleges irányban korlátozzák a fémolvadékvízszintes irányú áramlását a járaton át úgy, hogy megfelelőelhelyezkedésű terelőelemeket alkalmaznak, amelyeket az üstben lévőfémolvadék fő tömegének fürdőfelülete közelében, valamint az üstbenlévő fémolvadék fő tömegének alsó része közelébe helyeznek. Atalálmány feltárja az eljárást megvalósító berendezést is. Ó The present invention relates to a process for the treatment of molten metal in a metallurgical boiler with an electromagnetic field, in which a vertically located metallurgical boiler molten metal is produced between walls of a refractory ...

Feed material compostion and handling in a channel induction furnace

A method of operating a channel induction furnace to process a feed material and obtain therefrom at least one of a molten metal product, a vapor phase metal product and a slag product. The method includes avoiding the formation of islands of materials that are fed into the channel induction furnace. The method also involves breaking up islands of materials that are formed within the channel induction furnace. The method further involves adding a heat-conducting metal material into the channel induction furnace together with the feed material.

Improvements in or relating to induction furnaces

1,111,402. Agitating metal melts. L'AIR LIQUIDE, SOC. ANON. POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE. 11 Aug., 1966 [13 Aug., 1965; 27 June, 1966], No. 36085/66. Heading B1C. [Also in Division F4] A metallurgical induction furnace crucible 1 has in its lower portion at least one porous refactory plug 4 through which inert gas may be admitted to modify the electro-magnetic agitation currents; agitation by the gas may take place during, before or after the electromagnetic agitation. The gas may be inert or reactive. The crucible may have a cover (40, 42 Fig. 3, not shown) to conserve the atmosphere derived from an inert agitating gas; it may be provided with a gas inlet pipe (46). The winding 2 is energised by alternating current at 500-2,000 cycles/sec and gas is introduced at a rate of 0.2 to 2.1/min/cm<SP>2</SP> of plug surface in contact with the melt.

Apparatus for a metal reduction and melting process and a method of melting and reduction

In an apparatus for a metal reduction and metal melting process is burden (15) containing a metal and carbon heated in an induction furnace (10) comprising a heating vessel (11) in which the burden (15) can float in at least one heap (16, 17) on a liquid metal bath (18) in the vessel (11). The apparatus includes at least one induction heater thus inductor (12) which is located at the bottom centre line (11.1) of the vessel (11) and of which the longitudinal access is oriented perpendicular to the access of the vessel.

Gasifier

A gasifier for producing synthesis gas from a widely varying feedstock of waste and natural fuels, the gasifer including an induction furnace, a molten bed and slag reaction chamber mounted on top of the induction furnace, an opening fluidly connecting the molten metal and slag with the interior of the induction furnace and the inside bottom of the reaction chamber, the reaction chamber further containing a froth and off-take reaction zones above the molten metal and slag, and a lid at the top of the reaction chamber for enclosing the reaction chamber and collecting the heat and fuel gas produced therein.

Coreless induction furnace

Coreless induction furnace

Steel cleaning device

1453523 Refining steel using induction furnaces ALLMANNA SVENSKA ELEKTRISKA AB 22 Feb 1974 [23 Feb 1973] 8120/74 Heading C7D Crude steel is refined by introduction into a first channel type induction furnace 11 with at least one refining additive (e.g. deoxidizing, desulphurizing or slag forming agents such as aluminium granules, burnt lime or Misch metal) sealing the furnace and refining the steel in a protective atmosphere (e.g. argon or nitrogen) and/or degassing under vacuum while stirring by means of indicator unit 21 and then transferring to a second channel type induction furnace 23 through a gas tight communicating means 22 and tapping from the second furnace 23 which acts as a heat retaining furnace. The crude steel may be in the form of small pieces of steel scrap which are charged continuously to furnace 11 or may be charged in liquid form, the powdered refining agent(s) and alloy additions being added by injection into furnace 11 using an inert gas. The steel may be transferred by reducing the pressure in furnace 23 which may be tapped from spout 25 into a continuous casting plant by increasing the pressure in furnace 23 using argon as the pressure medium.

Method of disposing of organic and inorganic substances

Composition of matter tailoring: system ia

The present invention relates to tailored materials, particularly metals and alloys, and methods of making such ma-terials. The new compositions of matter exhibit long-range ordering and unique electronic character.

STEEL REFINING PROCESS

Patent FR2094028B1

Patent FR2115347A1

Method for refining steel

Process and plant for melting and purification of aluminium, copper, brass, lead and bronze alloys

The present invention relates to the apparatuses and methods in the field of melting and purification of aluminium, copper, brass, lead and bronze alloys. The plant is preferably compound by two magnetic induction apparatuses, one for melting of raw material and the second for purification of molten metal. Each apparatus is compound by a pot or crucible (1, 1'), an electromagnetic apparatus, a filter (11) and a power supply. Each crucible (1, 1') is surrounded in the lower part by a hollow permanent magnet (3, 3') where inside couples of electromagnets arranged in opposition are present. The process consists of the following stages: - charging of metallic raw material inside a crucible (1); - electromagnetic induction heating and melting of the metallic raw material (2) inside crucible (1) inside a three-phase magnetic system by a horizontal travelling or pulsed magnetic field and creation of a turbulent flux inside the melt (2'); - whirling stirring of melt (2') by electromagnetic induction and purification of it with extraction of hydrogen and of non-electroconductive inclusions by coagulation ofthem in agglomerates; - discharging of purified melt (2') by a magneto hydrodynamic pump for next treatments or technological actions such as the continuous or periodical casting through a filter for the mechanical filtration of the agglomerates.

Vacuum induction furnace

Installation for flow induction in fused material

FIELD: metallurgy. SUBSTANCE: invention can be used for inducing flow of electrically conductive molten material in a furnace. Apparatus includes a furnace chamber and a port in fluid communication with furnace chamber and having an inclined lower wall, apparatus comprises a bidirectional induction unit mounted to inclined lower wall of port for inducing flow in molten material in port, a retractable channel plate assembly positioned in port to define an extraction flow channel for molten material between channel plate assembly and inclined lower wall, a drive arrangement for moving channel plate assembly into and out of port, including a sensor system for measuring level of molten material in port and a feedback system for providing information regarding position of channel plate assembly. EFFECT: invention enables to use bidirectional induction unit, which operates in two modes - mixing molten material inside furnace chamber and dispensing molten material from furnace chamber through port for casting or other needs. 25 cl, 12 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 598 061 C2 (51) МПК F27D 27/00 (2010.01) F27B 3/19 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2013145099/02, 27.02.2012 (24) Дата начала отсчета срока действия патента: 27.02.2012 (72) Автор(ы): ГЕСТ, Грэхэм (GB) (73) Патентообладатель(и): ФАЙВС СОЛИОС ЛИМИТЕД (GB) Приоритет(ы): (30) Конвенционный приоритет: (43) Дата публикации заявки: 20.04.2015 Бюл. № 11 R U 09.03.2011 GB 1103986.4 (45) Опубликовано: 20.09.2016 Бюл. № 26 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 09.10.2013 (86) Заявка PCT: 2 5 9 8 0 6 1 (56) Список документов, цитированных в отчете о поиске: FR 2633708 A1, 05.01.1990. GB 1520210 A, 02.08.1978. EP 0192991 A1, 03.09.1986. RU 2333441 C2, 10.09.2008. 2 5 9 8 0 6 1 R U (87) Публикация заявки PCT: WO 2012/120276 (13.09.2012) Адрес для переписки: 129090, Москва, ул. Б.Спасская, 25, стр.3, ООО ...

Process for the continuous production of Bhsterkupfer from copper stone

Patent FR2035529A5

Method of regulating the temperature of the furnaces

ELECTROMAGNETICALLY INDUCED HEATING FURNACE, USE OF THE OVEN FOR FUSION OF A MIXTURE OF METAL (UX) AND OXIDE (S) REPRESENTATIVE OF A CORIUM

La présente invention concerne un four (1, 1', 1") à chauffage par induction électromagnétique destiné à faire fondre au moins un matériau conducteur électrique, tel qu'un oxyde et/ou un métal, comprenant au moins un inducteur (4, 4A, 4B) à au moins une spire (41 à 47) et au moins un circuit de refroidissement (5) adapté pour refroidir au moins l'inducteur, caractérisé en que ce que le fluide caloporteur d'au moins un circuit de refroidissement (5; 5.1 à 5.8) est du CO2 supercritique. L'invention concerne également un procédé de fonctionnement du four et son utilisation pour la fusion d'un mélange de métaux (acier, zirconium, ...) avec des oxydes (uranium UO2, zirconium, ...) ainsi que des composants du béton, le mélange étant représentatif d'un corium. The present invention relates to an electromagnetic induction heating furnace (1, 1 ', 1 ") for melting at least one electrically conductive material, such as an oxide and / or a metal, comprising at least one inductor (4, 4A, 4B) to at least one turn (41 to 47) and at least one cooling circuit (5) adapted to cool at least the inductor, characterized in that the heat transfer fluid of at least one cooling circuit ( The invention also relates to a method of operating the furnace and its use for the melting of a mixture of metals (steel, zirconium, etc.) with oxides (uranium UO 2, zirconium, ...) as well as concrete components, the mixture being representative of a corium.

Apparatus and method for stirring molten metal using electromagnetic field

Method and apparatus (40) for controlling stirring of molten metal (24) during processing in a metallurgical vessel (20), free of mechanical-contact with the molten metal (24). Efficiencies of metal processing and improvements in metallurgical properties are achieved by selecting configurations and placement of interacting apparatus (40), and by controlling electromagnetic field characteristics. Apparatus (40) can be retrofitted to an existing vessel and a reduction in vessel maintenance results from a decreased rate of slag buildup during usage.

Process and apparatus for producing semi-solidified slurry of iron alloy

A process for producing a semi-solidified slurry of an iron alloy including the steps of pouring a melt of an iron alloy into a semi-solidified slurry producing vessel 30 and cooling the melt therein to obtain a semi-solidified slurry having a crystallized solid phase and a residual liquid phase, wherein a hypoeutectic cast iron composition is used as a material, a melt of the composition is poured into the semi-solidified slurry producing vessel 30 in a predetermined amount at a time, a temperature of the melt when poured into the semi-solidified slurry producing vessel 30 is controlled to be not lower than a crystallization initiation temperature of the composition and not greater than a temperature that is 50° C. higher than the crystallization initiation temperature, and a cooling rate of the melt poured into the semi-solidified slurry producing vessel 30 is controlled not to exceed 20° C. per minute.

Furnace for making and delivering melts

HYPEREUTECTIC WHITE IRON ALLOY INCLUDING CHROME AND NITROGEN AND ARTICLES MADE OF THE SAME

Se da a conocer una aleacion hipereutectica de hierro blanco y articulos tales como componentes de bomba fabricados de la misma. Ademas de hierro e impurezas inevitables, la aleacion comprende, en porcentaje en peso basado en el peso total de la aleacion, de 2,5 a 6,5 de C, de 0,04 a 1,2 de N y de 18 a 58 de Cr y, opcionalmente, uno o mas de Mn, Ni, Co, Cu, Mo, W, V, Mg, Ca, Si, elementos de tierras raras, Nb, Ta, Ti, Zr, Hf, Al, B A hypereutectic alloy of white iron and articles such as pump components manufactured therefrom are disclosed. In addition to iron and unavoidable impurities, the alloy comprises, in percent by weight based on the total weight of the alloy, from 2.5 to 6.5 of C, from 0.04 to 1.2 of N and from 18 to 58 of Cr and optionally one or more of Mn, Ni, Co, Cu, Mo, W, V, Mg, Ca, Si, rare earth elements, Nb, Ta, Ti, Zr, Hf, Al, B

METHOD FOR REFINING METAL

Fiber composite article and method of manufacture

An article and method for its manufacture are described. The article is preferably a ladle used in the manufacture of metals and receives molten metal for further chemical processing in the ladle or for transportation. the ladle is transparent to a wide range of electromagnetic radiation wavelengths which allows the metal to be heated or stirred by induction without heating the ladle itself. The ladle is made of glass fibers and an inorganic cement, and this provides strength along with high temperature resistance. The article is manufactured by winding glass fiber around a mandrel, the glass fiber having an inorganic cement adhered to it. In one technique, the cement is provided on the fiber as an aqueous slurry, and the product is allowed to air cure after winding. In a second technique, the cement is adhered to the fiber by electrostatic attraction. After winding is complete, additional cement may be added, the product is placed in an autoclave supplied with steam whereby the cement takes up water, and it is then allowed to cure. After the product is cured, it is preferably sawed into two pieces to form two inductively transparent ladles.

Methods for the treatment of a melt with briquetted substances

Method for reducing oxidic slags and dusts and inductively heatable furnace for carrying out this method

Method for enhancing reduction of ores, oxides and melting of metals by magnetic forces

PROCESS FOR REDUCING OXIDIC MIST FROM DUST AND INDUCTIVE HEATABLE OVEN FOR CARRYING OUT THIS METHOD

Electromagnetic induction furnace and use of the furnace for melting a mixture of metal(s) and oxide(s), said mixture representing a corium

本发明涉及一种旨在熔化至少一种导电材料，例如氧化物和/或金属的电磁感应炉(1，1’，1”)，其包括具有至少一匝(41至47)的至少一个感应器(4，4A，4B)和适于至少冷却所述感应器的至少一个冷却回路(5)。所述炉的特征在于，所述至少一个冷却回路(5；5.1至5.8)的传热流体是超临界CO 2 。本发明还涉及一种运行所述炉的方法和所述炉的用途，用于熔化金属(钢铁、锆等)与氧化物(铀UO 2 、锆等)，以及混凝土组分的混合物，所述混合物代表堆芯熔融物。

Furnace, method and monitoring system for monitoring its condition

Process for reducing the electric steelworks dusts and facility for implementing it

Hypereutectic white iron alloys comprising chromium and nitrogen and articles made therefrom

Device for extraction of metals or metal compounds from material, containing metal or metal compounds

FIELD: metallurgy. SUBSTANCE: invention relates to a device for extraction of metals or metal compounds from a material containing metal or metal compound in an oven with a hearth, with a first inlet for lead-in of material, the first outlet for withdrawal of exhaust gas, by one or more electrodes of melting and/or recovery of the loaded material that stick out into the hearth of a furnace with a bottom electrode acting as cathode, and an additional electrode that performs the function of an anode, with the space, serving as a sedimentation zone designed in the area of toxins release, with an electric or a permanent magnet, which is located in the hearth of a furnace so that the magnetic flux created in the hearth of a furnace due to the constant current, is crossed by magnetic field, as well as an outlet for selection of molten metal and metal compound and overflow or an outlet of slag. EFFECT: simplified construction of furnace and improved slag cleaning in one step and a single unit. 4 cl, 1 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 455 600 (13) C2 (51) МПК F27B 3/08 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2010129525/02, 17.12.2008 (24) Дата начала отсчета срока действия патента: 17.12.2008 (73) Патентообладатель(и): СМС СИМАГ АГ (DE) 2 4 5 5 6 0 0 (43) Дата публикации заявки: 27.01.2012 Бюл. № 3 (45) Опубликовано: 10.07.2012 Бюл. № 19 2 4 5 5 6 0 0 R U (85) Дата начала рассмотрения заявки PCT на национальной фазе: 19.07.2010 C 2 C 2 (56) Список документов, цитированных в отчете о поиске: ЕР 1375628 А2, 02.01.2004. JP 8210777 A, 20.08.1996. SU 1617284 A1, 24.09.1987. SU 1130074 A1, 27.07.1999. RU 2235258 C1, 27.08.2003. (86) Заявка PCT: DE 2008/002125 (17.12.2008) (87) Публикация заявки РСТ: WO 2009/076945 (25.06.2009) Адрес для переписки: 109012, Москва, ул. Ильинка, 5/2, ООО "Союзпатент" (54) УСТРОЙСТВО ДЛЯ ИЗВЛЕЧЕНИЯ МЕТАЛЛОВ ИЛИ СОЕДИНЕНИЙ МЕТАЛЛОВ ИЗ МАТЕРИАЛА, СОДЕРЖАЩЕГО МЕТАЛЛ ИЛИ ...

Smelting process and apparatus

A smelting vessel (4) for producing molten metal includes a refractory lined hearth that in use is in contact with molten slag or molten metal in the smelting vessel, and the hearth includes a plurality of heat pipes (21) positioned in a refractory lining of at least a part of the hearth for cooling the refractory lining.

Process for metallurgical treatments

Four à induction du genre comprenant un creuset allongé (1) selon le sens vertical entouré d'enroulements électriques inducteurs (3) et incorporant un socle de briques réfractaires (2), caractérisé par un bloc-tuyère (14-15) monté au travers d'un passage de traversée (1) du socle et du fond (2) de creuset, maintenu en position de serrage étanche contre ladite paroi de passage par un moyen-support externe (18) fixé au blindage externe (4) de four, ladite tuyère (14-15) débouchant vers l'extérieur par un conduit axial d'injection de gaz (14). Grâce à cette disposition, on peut procéder à tout traitement métallurgique, notamment par injection de gaz actifs, tels CO2 , C2 , H2 et/ou inerte tel Ar et/ou N2 .

Process and apparatus for accelerating a reaction between a metal and a slag phase

Method of refining molten metal

본 발명은 금속 용탕을 진공 또는 저산소분압 대기하에서 감압정련시킨 다음 불활성 가스 플라즈마를 사용하여 가열함으로써 재정련시키는 방법에 관한 것이다. 처리되는 금속은 스텐레스강, Ni계 합금, Fe-Ni계 합금, 전자기 강, 질소 함유량과 황 함유량이 낮은 중탄소 구조용 강, 및 탄소, 산소 및/또는 황 함유량이 엄격하게 제한되는 고탄소계 합금 공구 강이다. 재정련시, CaO와 CaF 2 의 QOGKQANF CaO와 Al 2 O 3 의 배합물 및 CaO, CaF 2 및 Al 2 O 3 의 배합물인 용제를 사용한다. 예를 들면, 탄소 함유량이 0.01 이고 황 함유량이 0.005 인 Fe-Ni계 합금을 제조할 수 있다. The present invention relates to a method of refining a molten metal by vacuum refining under vacuum or low oxygen partial pressure atmosphere and then heating using an inert gas plasma. Metals to be treated include stainless steels, Ni-based alloys, Fe-Ni-based alloys, electromagnetic steels, medium-carbon structural steels with low nitrogen and sulfur content, and high carbon alloy tools with severely limited carbon, oxygen and / or sulfur content. It is a river. Uses a combination of the solvent of the relevant financial City, CaO and CaF 2 QOGKQANF of CaO and Al 2 O 3 formulation and CaO, CaF 2 and Al 2 O 3 in. For example, the carbon content is 0.01 Sulfur content is 0.005 It is possible to produce a Fe-Ni-based alloy.

The configuration of intermediate frequency furnace lining magnalium matter dry type ramming material and sintering process

本发明公开了一种中频炉衬铝镁质干式捣打料配置及烧结工艺，涉及钢铁冶金技术领域。本发明捣打料主要由以下重量百分含量的组分组成：粒径在0.5mm‑3mm的颗粒料65％‑75％；粒径在≤0.5mm的粉体料20％‑45％；粒径在≤0.1mm的外加剂0.1％‑0.5％；粒径在≤0.005mm的高温复合促烧剂1％‑3％。本发明通过合理的颗粒级配，提高了捣打料的抗热震性能及抗化学侵蚀性能，配合合理的烧结工艺，使炉衬在使用中形成尖晶石，产生的膨胀与烧结产生的收缩相匹配，可显著改善施工后中频炉炉衬的烧结质量，使炉衬总体强度很好，炉衬表面比较光滑，损毁也比较均匀，大大提高了炉衬使用寿命。

Method of manufacturing cast steel by means of the electric furnace

Electromagnetic stirrer

An electromagnetic stirrer which enables to obtain an excellent stirring force than the conventional stirrers. The electromagnetic stirrer comprises a coil (1) for generating a vertically traveling magnetic field provided on the outer circumference of a container (5) along the vertical direction, and a coil (2) for generating a votating magnetic field provided on the outside of the coil (1) for generating a vertically traveling magnetic field. The electromagnetic stirrer is further provided with comb teeth (3a) extending to the inner surface of the coil (1) for generating a vertically traveling magnetic field, and a core (3) composed of a magnetic material having magnetic isotropy inserted between the coil (1) for generating a vertically traveling magnetic field and the coil (2) for generating a rotating magnetic field.

Method and apparatus for continuously discharging molten metal and slag

A furnace system including a main furnace (1) for melting and reducing material to form molten metal and slag which are to be continuously discharged therefrom and provided with an outlet port (6) formed in an upper portion of the side wall thereof, and an auxiliary furnace (5) connected to the main furnace (1) and communicating with the interior of the main furnace (1) through the outlet port (6). The molten metal (14) and the slag (15) are allowed to continuously flow from the main furnace (1) into the auxiliary furnace (5) while maintaining the melt level (14, 15) in the main furnace (1) above the level of the outlet port (6) so as to seal the outlet port (6). The molten metal (14) and the slag (15) are discharged from the auxiliary furnace (5) ot the same rate as the increase in the amount of the molten metal (14) and the slag (15) in the main furnace (1). The auxiliary furnace (6) may be provided with temperature control device (11, 12, 13) for independently controlling the temperature of the molten metal (14) and the slag (15) in the auxiliary furnace (5).

Vessel for fuse metal and method of its production

FIELD: process engineering. SUBSTANCE: claimed vessel comprises body of refractory material. Said body has cavity to house or to transfer fused metal and outer surface including reinforcing metal wire mesh embedded directly therein or arranged right there above. Mesh sections overlapped make gaps there between for refractory metal to penetrate therein. Said mesh included at least two overlapped parts. One part is composed of braided wire carcass. Another part is composed of unbraided wire carcass. EFFECT: cracking resistance, ruled out fused metal leaks at cracking. 32 cl, 9 dwg, 1 ex

Method for dosing liquid metals from melting or holding vessels with electromagnetic conveyor trough

Continuous metallurgical smelting using an electromagnetic counterflow trough

Carbon abrasion resistant cast steel and its heat treatment method in a kind of high silicon

一种高硅中碳耐磨铸钢及其热处理方法，属于耐磨合金材料技术领域。铸钢化学组成及其质量分数为：0.42‑0.49％C，2.63‑2.75％Si，2.02‑2.19％Mn，1.88‑1.97％Cr，0.33‑0.38％N，0.31‑0.39％Al,0.0032‑0.0057％B，<0.03％S,<0.04％P,余量为Fe和不可避免的杂质。铸钢经900℃奥氏体化1h后随即进行320－350℃的等温淬火，保温时间2h，最后水冷至室温，即可获得贝氏体和残余奥氏体的复合组织，具有优良的力学性能和耐磨性，本发明铸钢主要合金元素为廉价的硅、锰，生产成本较低，推广应用具有显著的经济和社会效益。

Method of stirring liquid metal in electric arc furnace

전자기 교반의 제1 축(X1)을 따르는 제1 전자기장 및 전자기 교반의 제2 축(X2)을 따르는 적어도 하나의 제2 전자기장이 위치하는, 연속 충전 전기 아크로(10) 내의 액체 금속의 전자기 교반 방법을 제공하다.

Micro mill continuous steel process

A method of refining steel utilizing induction melting furnaces sized for use in micro mills consists of charging a medium frequency induction melting furnace having a maximum production rate of about 50 tons per hour with pre-refined steel, and melting steel in the furnace. The melted steel is transferred to a refining vessel, the refining vessel has a high free board, induction heating and stirring capacity and apparatus for supplying blasts of gas. The refined steel is then transferred to a tundish for a continuous casting operation.

The container of holding molten metal and manufacture method thereof

本发明的示例性实施例提供了用于盛装或输送在其中的熔融金属的容器。该容器的外表面的至少一部分合并嵌入在该表面中的金属线的网，线相互覆盖，在其间形成有开口。耐火材料渗透到这些开口中。该网可以包括织造金属线或非织造金属线或两者。该网赋予抗裂性（或一旦形成裂纹，遏制裂纹）和/或如果裂纹发展则抑制熔融金属泄漏。本发明还提供了包含这样的容器的金属盛装结构及其制造方法。

Fibre composite article and method of manufacture therof

METHOD AND DEVICE FOR CONTINUOUS TAKING OF METAL AND SLAG IN THE MOLTEN STATE.

A furnace system including a main furnace (1) for melting and reducing material to form molten metal and slag which are to be continuously discharged therefrom and provided with an outlet port (6) formed in an upper portion of the side wall thereof, and an auxiliary furnace (5) connected to the main furnace (1) and communicating with the interior of the main furnace (1) through the outlet port (6). The molten metal (14) and the slag (15) are allowed to continuously flow from the main furnace (1) into the auxiliary furnace (5) while maintaining the melt level (14, 15) in the main furnace (1) above the level of the outlet port (6) so as to seal the outlet port (6). The molten metal (14) and the slag (15) are discharged from the auxiliary furnace (5) ot the same rate as the increase in the amount of the molten metal (14) and the slag (15) in the main furnace (1). The auxiliary furnace (6) may be provided with temperature control device (11, 12, 13) for independently controlling the temperature of the molten metal (14) and the slag (15) in the auxiliary furnace (5).

Means for degassing molten metals or metal alloys

Apparatus for degassing molten metal comprises a vessel such as a ladle or mould for the molten metal, which vessel is placed in an evacuable tank provided with an electromagnetic stirrer operable at 2-10 cycles/sec. and with a cover which is positionable in the upper part of the vessel, said cover having on it a thermally insulating layer close to which is an induction heating device. As shown, a vessel (12) located inside the tank (11) is provided with a cover (17), the position of which may be varied by screw devices (14, 15); on the cover (17) is a thermally insulating layer (19) and a heating device (20). The stirrer (13) may alternatively be located, or may extend, below vessel (12). In a modification the stirrer and the heater may have a common winding, the low and high frequency currents being either superimposed or supplied alternately.

Channel furnace