• 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:
    Method of improving the heat balance and thus increasing the amt. of scrap that can be used in refining cast iron in a converter having oxygen tungenes below the bath surface with protective sheaths, and oxygen blowing devices above the bath level, is claimed in which during a large part of the refining period, 20-80% of the O2 is fed into the bath by jets directed toward the bath surface from above the bath surface, and the rest is blown in below the surface. The amount of O2 blown onto the surface from above is varied during the course of the refining. The properties of the steel produced are unaltered, despite the improved heat balance and the increased use of scrap. The axis of the free jets w.r.t. the surface of the bath make an angle with the axis of rotation of the converter of >35(>45) degrees.
    公开号:SU1306482A3
    申请号:SU782696952
    申请日:1978-12-08
    公开日:1987-04-23
    发明作者:Бротцманн Карл
    申请人:Эйзенверк-Гезельшафт Максимилиансхютте,Мбх (Фирма)；
    IPC主号:
    专利说明:

    This invention relates to ferrous metallurgy, in particular, to methods for smelting steel in converters.
    The purpose of the invention is to increase the efficiency of the process due to more complete heat recovery.
    The method is carried out as follows.
    In a converter with a capacity of 45 tons, 1 2 tons of scrap are loaded and 38 tons of pig iron of the composition are poured,%: carbon 4.2; silicon 0.7; manganese 0.8; phosphorus 0.1 with a temperature of 1280 ° C. The converter is equipped with ten nozzles, the inner tube for supplying oxygen of which has a B11 internal diameter of 18 mm located in the bottom, and an additional tuyere of diameter 40 mm to supply oxygen to the level of the melt installed above the trunnion in the transition zone the cylindrical part into a conical part at a height of 2 m from the level of the calm melt. Bottom nozzles and a lance are made in the form of two concentric tubes, the gap between which is 1 mm, and propane is blown into this gap in the form of a protective medium.
    The total duration of the redistribution, including a two-minute additional purge, is 10 minutes. In the process of redistribution, 2300 nm of oxygen is blown into the melt. I blow in oxygen through bottom nozzles with a speed of 7000 and through an additional lance - 4500. Through the annular gap of the bottom nozzles blown 2% by weight of propane oxygen, and through the annular gap of additional tuyere - 0.5% by weight of propane oxygen.
    To form slag with oxygen through bottom blowing nozzles
    Editor 0. Head Order 1469/58
    Compiled by V. Yakovlev
    Tehred I.Popov Ich Corrector M.Sharoshi
    Circulation 550Subscribe
    VNIIPI USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5
    Production and printing company, Uzhgorod, st. Project, 4
    2.4 tons of powdered lime are added. During the two-minute desalting phase, 1.5 tons of lime are blown in, and by the end of the main blowing process, 600 kg of lime is blown at a flow rate of 5 kg / nm of oxygen. In the course of a two-minute additional blow, foamy slag is formed in the converter and 300 kg of powdered lime is blown into the melt to suppress it for 20 seconds.
    As a result of this conversion, the resulting steel contains,%: carbon 0.03; manganese 0.1; phosphorus 0.015.
    Formula Investigation
    1. Method of steel smelting, in converter, including 1Y loading of scrap into converter, pouring iron, blowing oxygen in protective environment below melt level through bottom tuyeres, simultaneous oxygen supply from top to bottom of melt in center of bath at least one stream and lime supply into the converter at the beginning of the oxygen injection, characterized in that, in order to increase the efficiency of the process due to more complete heat utilization, oxygen blown into the melt level is supplied as a free jet and during the formation of foamy varnish below the level of the melt is infused with powdered lime,
    2. Method POP1, characterized in that the free jet is blown from a height of 2-10 m above the level of the calm bath.
    权利要求:
    Claims (2)
    [1]
    1. The method of steel smelting. In converter
    20 tere, including loading scrap into the converter, cast iron casting, blowing of oxygen in the shell of the protective medium below the melt level through the bottom tuyeres, and the simultaneous supply of oxygen25. and from the top to the melt level in the center of the bath with at least one stream and lime feed to the converter at the beginning of oxygen injection, characterized in that, in order to increase the efficiency of the process due to more complete heat recovery, oxygen injected to the melt level is fed to in the form of a free stream and with the formation of foamy slag below 35 melt levels, powdered lime is blown.
    [2]
    2. The method of pop. 1, characterized in that the free stream
    40 is blown from a height of 2-10 m above the level of a calm bath.
    类似技术:
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    SE413675B|1980-06-16|VIEW IN RESEARCH OF PHOSPHOUS LOW IRON IN CONVERTER
    US4462825A|1984-07-31|Method for increasing the scrap melting capability of metal refining processes
    US3793001A|1974-02-19|Process for manufacturing steel
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    JP6327298B2|2018-05-23|Hot metal refining method
    同族专利:
    公开号 | 公开日
    JPS57164908A|1982-10-09|
    CZ278679B6|1994-05-18|
    DE2755165B2|1980-09-18|
    DE2755165A1|1979-07-26|
    CZ811578A3|1994-02-16|
    DE2755165C3|1988-03-24|
    BE872620A|1979-03-30|
    ZA786885B|1979-11-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR1226680A|1959-02-27|1960-07-15|Siderurgie Fse Inst Rech|Method and device for improving the thermal efficiency of the refining of pig iron by jet of pure oxygen|
    US2991173A|1959-02-27|1961-07-04|Siderurgie Fse Inst Rech|Metal refining method and apparatus|
    FR1292748A|1961-06-22|1962-05-04|Beteiligungs & Patentverw Gmbh|Process for the refining of melts of cast iron, by blowing oxygen in several jets|
    GB1027601A|1962-04-16|1966-04-27|Loire Atel Forges|Method and apparatus for producing steel from pig iron|
    BE786021A|1971-07-29|1972-11-03|Creusot Loire|METHOD AND DEVICE FOR BLOWING PULVERULENT PRODUCTS IN A LIQUID METAL BATH|
    BE787143A|1971-08-04|1973-02-05|Creusot Loire|BLOWING PROCESS BY SUBMERSIBLE TUBES IN A METAL BATH|
    BE792128A|1971-12-06|1973-03-16|Uss Eng & Consult|PROCESS AND INSTALLATION FOR REFINING STEEL|
    US3895784A|1972-10-06|1975-07-22|United States Steel Corp|Apparatus for and method of optimum burning of carbon monoxide in a converter|
    AT337736B|1973-02-12|1977-07-11|Voest Ag|METHOD OF REFRESHING BIG IRON|
    DE2316768B2|1973-04-04|1977-03-03|Fried. Krupp Gmbh, 4300 Essen|PROCESS FOR REFRESHING METALS, IN PARTICULAR PIG IRON, AND DEVICE FOR CARRYING OUT THE PROCESS|
    US3960546A|1974-05-22|1976-06-01|United States Steel Corporation|Method for eliminating nose-skulls from steelmaking vessels|
    US4195985A|1977-12-10|1980-04-01|Eisenwerk-Gesellschaft Maximilianshutte Mbh.|Method of improvement of the heat-balance in the refining of steel|DE2816543C2|1978-04-17|1988-04-14|Eisenwerk-Gesellschaft Maximilianshütte mbH, 8458 Sulzbach-Rosenberg|Steel making process|
    DE2857581C2|1978-04-17|1983-11-17|Eisenwerk-Gesellschaft Maximilianshütte mbH, 8458 Sulzbach-Rosenberg|Steel making process|
    DE2838983C3|1978-09-07|1986-03-27|Klöckner CRA Technologie GmbH, 4100 Duisburg|Process for producing steel in the converter|
    DE2931957A1|1979-08-07|1981-02-12|Maximilianshuette Eisenwerk|METHOD FOR PRODUCING STEEL WITH LOW HYDROGEN CONTENT IN AN OXYGEN BLOW-UP CONVERTER|
    DE2939859C2|1979-10-02|1983-06-23|Klöckner-Werke AG, 4100 Duisburg|Steel making process|
    AT5202T|1979-12-11|1983-11-15|Eisenwerk-Gesellschaft Maximilianshuette Mbh|STEEL PRODUCTION PROCESS.|
    DE2949803C2|1979-12-11|1986-10-09|Klöckner CRA Technologie GmbH, 4100 Duisburg|Process for improving heat utilization in steelmaking from solid ferrous materials|
    DE3008145C2|1980-03-04|1989-09-21|Klöckner CRA Technologie GmbH, 4100 Duisburg|Steel making process|
    DE3016450C2|1980-04-29|1989-04-13|Kloeckner Cra Technologie Gmbh, 4100 Duisburg, De|
    DE3031680C2|1980-08-22|1988-02-25|Kloeckner Cra Technologie Gmbh, 4100 Duisburg, De|
    DE3133575C2|1980-08-22|1987-05-07|Kloeckner Cra Technologie Gmbh, 4100 Duisburg, De|
    DE3230013C2|1982-08-12|1985-07-25|Krupp Stahl Ag, 4630 Bochum|Method and device for melting chromium-nickel steels|
    DE3318005C2|1983-05-18|1986-02-20|Klöckner CRA Technologie GmbH, 4100 Duisburg|Process for making iron|
    AT390082B|1987-12-01|1990-03-12|N Proizv Ob Tulatschermet|METHOD FOR STEEL PRODUCTION IN AN OXYGEN BLOW CONVERTER|
    DE327862T1|1988-02-12|1989-12-07|Kloeckner Cra Patent Gmbh, 4100 Duisburg, De|METHOD AND DEVICE FOR AFTERBURNING.|
    DE4234973C1|1992-10-16|1994-06-01|Tech Resources Pty Ltd|Process for protecting the refractory lining in the gas space of metallurgical reaction vessels|
    DE4234974C2|1992-10-16|1994-12-22|Tech Resources Pty Ltd|Process for increasing the turnover of materials in metallurgical reaction vessels|
    DE4238020C2|1992-11-11|1994-08-11|Kct Tech Gmbh|Procedure for the operation of a multimedia nozzle and the nozzle system|
    DE102012016074A1|2012-08-08|2014-02-13|Saarstahl Ag|Process for operating a reaction vessel for steel production, and steel converter arrangement itself|
    DE102015105307A1|2015-04-08|2016-10-13|Sms Group Gmbh|converter|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19772755165|DE2755165C3|1977-12-10|1977-12-10|
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