• 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:
    1. METHOD.SUBSURFACE GAS REFINING OF STEEL, including the supply of oxygen-containing gas containing up to 90% of the gas of the diluent into the melt through the lance of the deep purge of the oxygen, while controlling the temperature of the melt, which is out of the way, the sample will burn as oxidizing aluminum, while controlling the temperature of the melt which is in the free-flowing gas of the melt. The aluminum is introduced into the melt at a carbon content of 0.28%. 2. Method pop.1, distinguished by the fact that up to 35% of aluminum is introduced into the melt before the melt is decarbonated to a carbon content. WITH
    公开号:SU1114343A3
    申请号:SU803221903
    申请日:1980-12-22
    公开日:1984-09-15
    发明作者:Пол Бери Роланд；Кини Мельман Стюарт；Джеймс Андрейни Рокне
    申请人:Юнион Карбид Корпорейшн (Фирма)；
    IPC主号:
    专利说明:


    oo 1
    00
    one
    The invention relates to the production of steel, and more specifically to the processes of refining steel with the addition of burning additives.
    There is a known method for subsurface gas refining of steel, including the first-to-one flow into the melt through a tuyere of a deep purge of oxygen-containing gas containing up to 90% of the diluent gas, and the addition of oxidized additives to burning as the melt
    A disadvantage of the known method is the possibility of ejection of slag-metal emulsion from the converter throat during the melt purge, which reduces productivity and is dangerous for the service personnel.
    The aim of the invention is to prevent emissions. This goal is achieved by the fact that according to the method of subsurface refining of steel, into the batch feed into the melt through a tuyere deep purge of oxygen-containing gas containing up to 90% of diluent gas, and introducing as burnable oxidizable aluminum additives while simultaneously controlling the temperature of the melt, aluminum are introduced into the melt at a carbon content of less than 0.28%.
    Up to 35% of aluminum can be melted before the melt is decarbonated to a carbon content of 0.28.
    The drawing shows typical temperature curves of the melting of carbon steel refined in accordance with the invention (curves A. And B), and melting refined in accordance with a known method. (curve C).
    In accordance with curve A, the oxide ui ys material (aluminum) is added after the decarburization is completed. At this point, the aluminum is added in order to raise the temperature to the required level, above the melt discharge temperature and to provide such a quantity of heat that at the end of the final stage (dashed line) the melt has at least the temperature required for the release. According to curve B, about 1/3 of the total amount of aluminum is added before decarburization. Aluminum boosts
    1D: 3432
    The melt temperature is about 38 ° C. Then, when the decarburization is completed, the remaining part of the aluminum is added in order to bring the temperature of the melt to
    a required level that guarantees an appropriate melt discharge temperature at the end of the final stage. Curve C illustrated,
    10 results are obtained according to the known method when all aluminum was added before decarburization.
    Example 1. A melt of 20,000 kg of steel was carried out in an AOD converter with a capacity of 23 tons. The mixture was melted under reducing conditions in an arc furnace. Before transferring the melt from the arc furnace to the converter, 620 kg of lime was loaded, after which the melt was blown with oxygen for decarburization and to remove silicon and argon. After 27 minutes of purging, the temperature was set at 1680 ° C. 23 kg of nickel and 16 kg of molybdum were introduced as alloying additives. Then added 52 kg of aluminum and renewed for more than 4 minutes. The temperature at the end of the purge was 1710 G. Then, 170 kg of 75% FeSi was added as a dopant, and the melt was mixed.
    one argon for 4 min. Melt samples were taken for chemical analysis, the final doping of the additives was introduced and agitation was carried out with argon. Melting was launched at a temperature of 1610 C. Emissions did not occur. The carbon content at the time of the introduction of aluminum was 0.17%.
    Example 2. 33600 kg of steel were melted in a 36 ton AOD converter. Melting was decarburized to 0.06% in an arc furnace using mill scale and a sufficient amount of lime and lime to form basic slag. Slag was recovered from the furnace and smelting was released. 1160 kg were previously loaded into the converter. Then the staggy from the arc furnace and 45 kg of aluminum was loaded and stirred with argon for 1 min. Added 250 kg of standard ferromanganese and 300 kg of graphite. Then melt
    with a flow rate of 32.8 g / min oxygen and 10.9 argon for decarburization and removal of silicon. After argon-oxygen purge for 8 min, the temperature was 1565 ° C. Then added 140 kg
    75% FeSi 1 agitated with argon for 4 min. P11avka was released at 1640 C. Emissions were not observed during smelting. The carbon content at the time of introduction of aluminum was 0.28% C.
    Jf-OO 3300 3200 3fOO
    3000
    geyo
    2800 2100
    M I
    f f t
    WJ520
    TlMS {min)
    1800
    1700
    ta
    44
    silt “i tb
    1600
    J50q
    25
    thirty
    权利要求:
    Claims (2)
    [1]
    1. SUBSURFACE METHOD
    GAS REFINING OF STEEL, which includes supplying a melt through a lance of a deep purge of an oxygen-containing gas containing up to 90% gas diluent and introducing aluminum as combustible oxidizing additives while controlling the temperature of the melt, characterized in that, in order to prevent emissions, aluminum is introduced into the melt with a carbon content of less than 0.28%.
    [2]
    2. The method according to claim 1, characterized in that up to 35% of the aluminum is introduced into the melt before the melt is decarburized to a carbon content of 0; 28%.
    类似技术:
    公开号 | 公开日 | 专利标题
    JP2013167015A|2013-08-29|Method for preliminary treatment of molten iron
    US4295882A|1981-10-20|Steel making process
    SU1114343A3|1984-09-15|Method for subsurface gas refining of steel
    US4373949A|1983-02-15|Method for increasing vessel lining life for basic oxygen furnaces
    US4925489A|1990-05-15|Process for melting scrap iron, sponge iron and/or solid pig iron
    EP0073274B1|1987-04-01|Method of preliminary desiliconization of molten iron by injecting gaseous oxygen
    JP2013189714A|2013-09-26|Method for preliminary treatment of molten iron
    EP0015396A1|1980-09-17|A method for increasing vessel lining life for basic oxygen furnaces
    KR100349160B1|2002-10-19|Converter refining method for manufacturing low carbon steel
    JP3496545B2|2004-02-16|Hot metal desulfurization method
    US3860418A|1975-01-14|Method of refining iron melts containing chromium
    JP2000129329A|2000-05-09|Method for dephosphorizing molten iron
    RU2437941C1|2011-12-27|Procedure for melting steel in arc steel melting furnace with increased consumption of liquid iron
    US20210404047A1|2021-12-30|Carburizer and carburization method using the same
    SU1355632A1|1987-11-30|Method of obtaining vanadium-containing steels
    SU1300037A1|1987-03-30|Steel melting method
    SU1071645A1|1984-02-07|Method for making steel
    KR100328028B1|2002-06-29|A Method of Controlling Temperature of Melts in Steel Refining
    JP2757761B2|1998-05-25|Method for producing molten stainless steel by smelting reduction
    JP2012041584A|2012-03-01|Method for producing high chromium steel
    JP2842185B2|1998-12-24|Method for producing molten stainless steel by smelting reduction
    SU483441A1|1975-09-05|The method of refining mild steel
    SU1310433A1|1987-05-15|Method for neutralizing final slag
    SU1421777A1|1988-09-07|Method of producing steel
    JP3511685B2|2004-03-29|Bottom blow converter steelmaking
    同族专利:
    公开号 | 公开日
    EP0033780A1|1981-08-19|
    FI804007L|1981-06-28|
    NO153861B|1986-02-24|
    EP0033780B2|1990-11-28|
    DK552980A|1981-06-28|
    JPS56127726A|1981-10-06|
    IN155179B|1985-01-12|
    US4278464A|1981-07-14|
    ZA807929B|1982-01-27|
    NO803907L|1981-06-29|
    KR830005374A|1983-08-13|
    JPS6014812B2|1985-04-16|
    ES8202593A1|1982-02-01|
    KR850000927B1|1985-06-28|
    FI67094C|1985-01-10|
    YU41453B|1987-06-30|
    FI67094B|1984-09-28|
    EP0033780B1|1985-10-09|
    NO153861C|1986-06-04|
    DE3071177D1|1985-11-14|
    BR8008338A|1981-07-07|
    CA1157276A|1983-11-22|
    YU325480A|1983-02-28|
    ES498039A0|1982-02-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3107995A|1961-04-06|1963-10-22|Katakura Sampei|Refining material for iron and steel and method of producing same|
    US3702243A|1969-04-15|1972-11-07|Nat Steel Corp|Method of preparing deoxidized steel|
    US3960546A|1974-05-22|1976-06-01|United States Steel Corporation|Method for eliminating nose-skulls from steelmaking vessels|
    US4187102A|1978-08-24|1980-02-05|Union Carbide Corporation|Method for controlling the temperature of the melt during pneumatic refining of steel|
    US4210442A|1979-02-07|1980-07-01|Union Carbide Corporation|Argon in the basic oxygen process to control slopping|US4436553A|1982-01-22|1984-03-13|Union Carbide Corporation|Process to produce low hydrogen steel|
    US4451288A|1982-06-29|1984-05-29|Union Carbide Corporation|Method for producing low hydrogen content in steels produced by subsurface pneumatic refining|
    US4477278A|1983-01-06|1984-10-16|Union Carbide Corporation|Steelmaking process using calcium carbide as fuel|
    US4488903A|1984-03-14|1984-12-18|Union Carbide Corporation|Rapid decarburization steelmaking process|
    US4551175A|1984-04-17|1985-11-05|Union Carbide Corporation|Method for controlling slag chemistry in a refining vessel|
    US4761178A|1987-08-24|1988-08-02|Bethlehem Steel Corporation|Process for heating molten steel contained in a ladle|
    IN172394B|1988-07-22|1993-07-17|Boest Alpine Stahl Donawitz Ge|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US06/107,535|US4278464A|1979-12-27|1979-12-27|Method for preventing slopping during subsurface pneumatic refining of steel|
    [返回顶部]