• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A DC arc furnace hearth is formed by brickwork having electric conductors extending through it, the conductors at their bottoms connecting with an electrically conductive layer on which the brickwork is layed and having top ends contacted by a melt contained by the brickwork. Arcing power can be transmitted via the conductive layer and conductors to the melt.
    公开号:SU1351521A3
    申请号:SU802937829
    申请日:1980-06-25
    公开日:1987-11-07
    发明作者:Стенквист Свен-Эйнар；Раппингер Бо
    申请人:Асеа Аб Швеция；
    IPC主号:
    专利说明:

     1351521
    The invention relates to metallurgy, and more specifically to devices for arc furnaces of direct current.
    in ki
    The purpose of the invention is to increase the reliability. but one, two or more, while maintaining the operation of the furnace.
    FIG. 1 shows a furnace, a cross-section; FIG. 2 shows a refractory brick with a built-in metal element, isometric.
    Breaking in bricks is also carried out in the form of a hole. The recess is located in the joints of the brick wall or in the joints of the expanded
    10 walls or conductors are laid into the brick before pressing and possible improvement. The bricks 7 may also have a lining of metal, sheet, for example, formed
    The arc furnace consists of a housing 1 provided with a conventional coating or lining of metallic material 2. The number of arc-forming electrodes (cathodes) is one, but two, three or more can be used. The electrode is hollow, i.e. the furnace is intended for reduced purposes. The present invention can be applied in melting furnaces having a solid electrode (graphite electrode 3), which is connected as a cathode. Ore concentrate (e.g., in the production of pig iron), coke and lime are fed through the central channel 4 of the electrode, and a surface free of slag is created under the electrode. The furnace is provided with an exhaust chute 5 and a shutter 6 for the spike. Below the furnace body there is a hearth connection consisting of bricks 7, in which metal conductors 8 are located, penetrating downwards into contact lining 9 consisting of electrically conductive carbon ricks-bricks or magnesite graphographs installed in several layers, and ending with a metal plate 10, for example, from copper or steel, which runs for a considerable distance along the bottom of the furnace and is intended to be connected to the positive pole of a direct current source. This flow connection has a large extent in order to make the furnace current flow along a considerable part of the bottom and in price.
    furnace, thereby preventing angular adjustment of the arc 11 ,. The hearth joint plate is provided with means
    12dl air or liquid cooling, and possibly both. Bricks 7 furnaces with conductors form the furnace conductors between the charge.
    13 and contact lining 9 or contact plate 10, instead of COAL bricks, magnetite-graphite can be used.
    The bricks are provided with grooves 14, in which metallic conductors 8 are located. The number of grooves is
    Breaking in bricks is also carried out in the form of a hole. The recess is located in the joints of the brick wall or in the joints of the expanded
    walls or conductors are laid into the brick before pressing and possible improvement. The bricks 7 may also have a lining of metal, sheet, for example, formed
    in the form of this type of metal-coated bricks, while the bricks inside are reinforced with a sheet of metal. A combination of metal cladding and reinforcement is also used. The metal cladding and / or fittings thereafter may form a current conductor from the charge to the back lining.
    A space for the conductors 8 is created during the manufacture of the bricks. The holes are formed by introducing a hot material into the brick composition prior to pressing and possibly firing. Holes are drilled before or after.
    possible roasting and / or after casting and sawing bricks. The making of grooves and beveled edges is achieved by a suitable mold that forms a space for current conductors — while the grooves and beveled edges are made after possible firing and certainly after the bricks are cast before cutting. The formation of grooves is possible by pressing or cutting.
    By improved brick is meant a tar-containing brick, which is heated to about 600 ° C to remove
    Q
    4g volatile components.
    Chemically bonded and improved bricks are supplied with conductors 8 even prior to pressing.
    The bricks contain inner sheets that are used as a conductor. Chemically bound bricks are bricks that are made chemically with adequate strength even before the furnace is started.
    A good electrical contact between the metal current conductors 8 and the contact lining 9 can be guaranteed by introducing the current conductors into the plastic wire layer.
    The composition is 15, for example a graphite composition, which is placed between the back lining and the formed ceramic bricks. Current conductors can be pushed into the drilled holes directly in the contact part 9. Such holes are drilled according to the installation of the formed ceramic bricks and conductors. Together with the holes in the contact lining 9, metal conductors are driven into it by means of a pressure element, such as some type of nail gun, in concrete. When it comes to metal-coated bricks, a large contact surface is obtained, no rods are driven in and no holes are drilled, but in this case the contact is also improved by using a plastic conductive composition, such as graphite composition, or by means of a conductive powder, for example graphite powder.
    The number of conductors in the hearth joint depends on the bottom surface of the furnace, the size of the bricks, the desired amperage, the cross section, and the resistivity of the conductors. The choice of conductor metal depends on the process and composition of the molten bath
    five
    flax metal. The conductors are located in the holes, in the joints of the wall or the joints of the expanded wall in the form of grooves on the side of the brick or in the form of the hewn edge of the brick, or in the form of a sheet.
    metal coating for metal-coated bricks.
    The number of layers of such wire brick bricks is equal to one or more, and in the latter case, a coherent current path is created for the conductors through the bottom of the furnace at the hearth connection.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    A DC arc furnace, containing: a electrically conductive underneath to receive a carbon-containing melt, one arching electrode located above the hearth, a steel or copper plate for connecting the hearth with a DC source, so as to increase the reliability work, under the furnace is made of two layers, with the bottom layer consisting of magnetite graphite or coal bricks, and the top one is formed of ceramic bricks with metal elements in contact with the bottom layer of the hearth and the melt.
    M
    Editor N. Rogulich
    Compiled by And, Chepikova Tehred A. Kravchuk
    Order 5302/59 Circulation 543 Subscription
    VNIIPI USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5
    Production and printing company, Uzhgorod, st. Project, 4
    FIG. 2
    Proofreader, Shekmar
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1351521A3|1987-11-07|D.c.electric arc furnace
    US4228314A|1980-10-14|DC Arc furnace hearth
    US4277638A|1981-07-07|Prefabricated unit for a DC arc furnace
    US5912916A|1999-06-15|Electric furnace with insulated electrodes and process for producing molten metals
    US3551319A|1970-12-29|Current collector
    US5381440A|1995-01-10|Bottom electrode for direct current arc furnaces
    US5173920A|1992-12-22|Direct-current electric-arc furnace
    US5199043A|1993-03-30|Lining for a direct-current electric arc furnace
    US4532633A|1985-07-30|DC arc furnace improved hearth construction
    EP3892743A1|2021-10-13|Electric arc furnace
    US1220839A|1917-03-27|Method of making furnace-hearths.
    US1221139A|1917-04-03|Apparatus and method for producing metals of improved quality.
    SU1259086A1|1986-09-23|Salt heating furnace
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    US4783790A|1988-11-08|Direct-current arc furnace for steelmaking
    US750170A|1904-01-19|Method of electric heating
    US335499A|1886-02-02|Process of heating and reducing ores by electricity
    GB120786A|1918-11-28|Improvements in or relating to Electric Furnaces.
    US1061016A|1913-05-06|Process of melting ferro-alloys and keeping them in liquid state.
    SE436300B|1984-11-26|DC LIGHT BAG OVEN DC LIGHT BAG
    US882418A|1908-03-17|Process of producing silicospiegel.
    Nunnington et al.1985|Developments in refractories for plasma technology
    SU1111007A1|1984-08-30|Resistance furnace
    CA2023041A1|1991-02-22|Direct-current electric-arc furnace
    US790392A|1905-05-23|Process of producing ferrochromium.
    同族专利:
    公开号 | 公开日
    GB2055028B|1983-03-16|
    DE3022566A1|1981-01-22|
    FR2459952B1|1985-07-19|
    IT1129102B|1986-06-04|
    US4324943A|1982-04-13|
    GB2055028A|1981-02-18|
    DE3022566C2|1987-12-17|
    FR2459952A1|1981-01-16|
    JPS567976A|1981-01-27|
    JPH0115795B2|1989-03-20|
    SE423275B|1982-04-26|
    IT8067991D0|1980-06-25|
    SE7905584L|1980-12-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE310811C|
    DE219575C|
    US941419A|1908-11-04|1909-11-30|Charles Albert Keller|Electric furnace.|
    GB190914858A|1909-06-26|1910-01-20|Charles Bingham|Improvements in or relating to Electric Furnace Electrodes.|
    FR500955A|1919-03-05|1920-03-30|William E Moore|Improvements to electric ovens|
    US3952140A|1972-08-02|1976-04-20|Engineered Metal Products Company, Inc.|Modular divisible barrel-shaped shell for metallurgical furnaces|
    US3916047A|1973-08-21|1975-10-28|Raymond J Niesen|Coated steel form for use in a coreless induction furnace|
    US3832478A|1973-12-05|1974-08-27|Bethlehem Steel Corp|Method for preventing early damage to furnace refractory shapes|
    SE410654B|1978-02-28|1979-10-22|Asea Ab|DIAMOND CANDLES OVEN WITH AT LEAST ONE CATODICALLY CONNECTED ELECTRODE AND AT LEAST ONE BOTTOM CONNECTOR|
    JPH0582786B2|1984-07-19|1993-11-22|Canon Kk|DE3106741C2|1981-02-24|1983-06-16|M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 4200 Oberhausen|Contact electrode arrangement for arc or resistance melting furnace|
    SE445584B|1981-05-25|1986-06-30|Asea Ab|LIGHT BAG OVEN INFO|
    SE431792B|1981-06-09|1984-02-27|Asea Ab|PUT TO OPERATE A DC LIGHT REAR OVEN|
    DE3413745C2|1983-04-21|1994-03-03|Asea Ab|DC arc furnace|
    SE452542B|1983-04-21|1987-11-30|Asea Ab|DC arc furnace|
    SE436819B|1983-06-01|1985-01-21|Asea Ab|DC LIGHT REVERSE WITH AT LEAST ONE CATODICALLY CONNECTED ELECTROD AND AT LEAST ONE BOTTLE CONTACT|
    DE3409255C2|1984-03-14|1987-08-20|Didier-Werke Ag, 6200 Wiesbaden, De|
    US4601041A|1984-05-04|1986-07-15|Mannesmann Aktiengesellschaft|Electrode mounting in DC arc furnace vessels|
    SE450857B|1985-02-21|1987-08-03|Asea Ab|PROCEDURE FOR BUILDING OF LIGHT REAR SUCTIONS OR DRAWERS|
    US4552343A|1985-05-13|1985-11-12|Insul Company, Inc.|Combination electric furnace and slag retaining pouring spout|
    DE3535692A1|1985-10-05|1987-04-09|Gutehoffnungshuette Man|CONTACT ELECTRODE ARRANGEMENT FOR DC ARC OR RESISTANCE MELTING OVENS|
    US5173920A|1989-08-21|1992-12-22|Asea Brown Boveri Ltd.|Direct-current electric-arc furnace|
    AT392998B|1989-08-24|1991-07-25|Bayerwald Fensterfabrik Altbuc|Door with a peripheral load-bearing wooden frame|
    US5052018A|1989-10-12|1991-09-24|Deutsche Voest-Alpine Industrieanlagen Gmbh|Anode for a direct current arc furnace|
    CH680086A5|1990-05-09|1992-06-15|Asea Brown Boveri|
    DE4022720A1|1990-07-17|1992-01-23|Flohe Gmbh & Co|UNDERWAY OF A DC ARC FURNACE|
    JP2607762B2|1991-03-15|1997-05-07|品川白煉瓦株式会社|Refractory structure of DC electric furnace anode block|
    DE4126627C2|1991-08-12|1994-11-24|Voest Alpine Ind Anlagen|Anode for a DC arc furnace|
    DE4129756C2|1991-09-04|1995-06-29|Mannesmann Ag|Metallurgical vessel for a DC arc device|
    AT396942B|1991-12-16|1993-12-27|Voest Alpine Ind Anlagen|METHOD FOR PRODUCING METAL MELT, IN PARTICULAR STEEL MELT|
    DE4222854C2|1992-07-11|1995-08-31|Gutehoffnungshuette Man|Base electrode for DC arc furnaces|
    US6355904B1|1996-06-07|2002-03-12|Science Applications International Corporation|Method and system for high-temperature waste treatment|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE7905584A|SE423275B|1979-06-26|1979-06-26|BOTTEN CONTACT AT DC LIGHT REAR OVEN|
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