• 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:
    Steel is made from solid materials(a) contg. Fe, such as scrap, in a converter with tuyeres passing through the lower part of the refractory lining. Oxidant gas, e.g. O2, in a protective medium(b), is injected via the tuyeres for burning materials(c) contg. carbon, so hot gases flow up through chargena) for preheating, followed by melting and refining in the same converter. In preheating, materials(c) are pref. gases or liqs. burned in stoichiometric amts. to form CO and H2O, esp. using light or heavy fuel oil, petroleum derivs. such as residues, and/or crude tar; or CH4, C3H8, C4H10, and/or similar gases. The tuyeres pref. have an inner pipe with at least one outer pipe forming an annulus fed with liq. hydrocarbon(b). A high proportion of scrap and other solids(a) can be melted with high thermal efficiency.
    公开号:SU1314955A3
    申请号:SU782611403
    申请日:1978-05-03
    公开日:1987-05-30
    发明作者:Бротцманн Карл；Фассбиндер Ганс-Георг
    申请人:Айзенверк-Гезельшафт Максимилиансхютте Мбх (Фирма)；
    IPC主号:
    专利说明:

    This invention relates to converter steel production, in particular, to a method for producing steel in a bottom blast converter.
    crushed coke is carried out for 15 minutes, so that only 6 tons of coke are fed to the converter. Then, the 10-minute limit is fulfilled with the purpose of the invention — an increase of 5 times more than 300 im / min of oxygen and
    performance of the unit due to increased bottom stability and reduced downtime.
    The supply of solid carbon-containing materials while coating the tuyeres with a melt helps to maintain the oxidative potential of the melt at a low level, due to which the content of the lining causing significant wear
    ten
    propane. Steel is produced with a temperature of 1620 s. After 600 heats, the shell and bottom of the converter are replaced.
    Example 2 (comparative). Example 1 is repeated with the difference that 6 tons of coke are loaded into the envelope together with scrap, i.e. Coke pod into converter before spraying bottom nozzles. At the same time
    liquid ferrous oxide in the melt, a powerful heating of the mixture is carried out
    is low. In addition, the temperature of the melt is maintained at a low level, which increases the resistance of the bottom
    Example 1. A bottom-bottom converter with a capacity of 60 tons, equipped with ten tuyeres, each of which is made of two concentric tubes, with the center tube of each nozzle having a light diameter of 24 mm and the annular gap having a width of 1 mm. The lining of the converter is made of iron-poor magnesite refractory and has the following wall thickness: 700 mm in the lower cone, and 550 mm in the cylindrical part and the converter mouth. The bottom of the converter is equipped with magnesite refractory 900 mm thick. 66 tons of scrap are loaded into this converter, which is preheated by supplying 250 oxygen through the annular gap of the nozzles and 120 l / min of oil through the central nozzle pipes for 15 minutes. After this time, the nozzle openings are covered with melt (the moment at which the nozzle openings are covered with melt is determined by the composition of the exhaust gas, i.e. during the preheating time, the oil is burned almost stoichiometrically to carbon dioxide and water, and in the presence of melt, at least 5%, in terms of the amount of scrap loaded, the content of carbon monoxide in the exhaust gas rises sharply to 50% or more). From this point on, 15 propane instead of oil is fed through the annular nozzle gap, 400 kg / min of crushed coke are blown into the nozzles instead of oxygen using nitrogen as a carrier gas, and 300 nm / min of oxygen are fed through the other nozzles. Feed
    crushed coke is carried out for 15 minutes, so that only 6 tons of coke are fed to the converter. A 10 minute limit is then performed with supplying 300 im / min of oxygen and
    propane. Steel is produced with a temperature of 1620 s. After 600 heats, the lining and bottom of the converter are replaced.
    Example 2 (comparative). Example 1 is repeated, with the difference that 6 tons of coke are loaded into the converter together with scrap, i.e. Coke is fed to the converter before melt coating of bottom nozzles. In this case, the preheating of the mixture is carried out
    five
    0

    0
    five
    0
    five
    by supplying 100 l / min of oil and 220 oxygen for 13 minutes. After 350 heats, the refractory bottom of the converter should be replaced.
    Example 3 (comparative). Example 1 is repeated; however, after coating with the melt of bottom nozzles, first 250 oxygen is blown into the propane shell in an amount of 3% of the volume of oxygen. Three minutes after the start of the injection of oxygen in the propane shell, 400 kg / min of crushed coke are blown through the two bottom nozzles with nitrogen as a carrier gas, and the other nozzles are blown through
    300 HM / min of oxygen. Coke feeding is carried out for 15 minutes. In this case, after 420 heats the refractory bottom of the converter should be replaced.
    A comparison of the results of examples 1-3 suggests that an increase in the bottom resistance is achieved only if the solid carbon-containing material is supplied immediately after coating with the melt of bottom nozzles.
    权利要求:
    Claims (1)
    [1]
    Claims;
    The method for producing steel in a bottom-blown converter, which includes loading scrap into the converter, preheating it by blowing oxygen through the tuyeres from the bottom into the oxygen scrap and carbon-containing fuel, taken in a stoichiometric ratio, melting it and then redistributing the melt by supplying oxygen from the bottom, characterized by that, in order to increase the productivity of the unit by increasing the durability of the bottom and reducing downtime, solid carbon is fed directly after coating the bottom tuyeres with the melt single material
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    同族专利:
    公开号 | 公开日
    DE2719981C3|1987-12-03|
    DE2719981B2|1980-09-04|
    DE2719981A1|1978-11-16|
    ZA782486B|1979-04-25|
    JPS5729521A|1982-02-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE1433452A1|1964-09-09|1968-11-07|Krupp Gmbh|Process for melting solid metallic feedstocks in metallurgical ovens, e.g. in inflation oxygen converters|
    FR1514381A|1967-01-13|1968-02-23|Soc Metallurgique Imphy|Process and installation for the reductive melting of scrap iron, powders, or iron sponge|
    GB1277083A|1968-06-25|1972-06-07|Columbia Gas Syst|Improvements in method for refining solid ferrous metal to steel|
    DE1800610C2|1968-10-02|1971-07-08|Kloeckner Werke Ag|Method and device for melting down scrap|
    BE791958A|1972-03-22|1973-03-16|Sydney Steel Corp|PERFECTIONED SOLE OVEN|
    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|
    GB1419363A|1973-05-31|1975-12-31|Maximilianshuette Eisenwerk|Metal refining|
    DE2346087B2|1973-09-13|1977-06-16|Verfahrenstechnik Dr.-Ing. Kurt Baum, 4300 Essen|PROCEDURE FOR OPERATING A FLOOR-BUBBLING OXYGEN CONVERTER|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|
    DE2949803C2|1979-12-11|1986-10-09|Klöckner CRA Technologie GmbH, 4100 Duisburg|Process for improving heat utilization in steelmaking from solid ferrous materials|
    HU192851B|1982-08-17|1987-07-28|N Proizv Ob Tulatschermet|Method of preparing steel by converter process from solid, ferrous, metallic materials, particularly from scraps|
    US4466786A|1982-08-31|1984-08-21|Aluminum Company Of America|Apparatus for production of atomized powder|
    US4557758A|1982-12-16|1985-12-10|Mizin Vladimir G|Steelmaking process|
    BR8507318A|1985-12-17|1988-02-09|Dn Metall Inst|PROCESS FOR THE MANUFACTURE OF STEEL IN A BASIC CONVERTER TO OXYGEN FROM A LOAD CONTAINING METAL, SOLID FE|
    US5286277A|1992-05-26|1994-02-15|Zaptech Corporation|Method for producing steel|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19772719981|DE2719981C3|1977-05-04|1977-05-04|
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