• 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:
    Ferrosilicon is manufactured from a material containing silica and a raw material containing iron by injecting these materials, possibly together with a reducing agent, with the help of a carrier gas into a plasma gas. The silica and the iron raw material, possibly with the reducing agent, heated in this way are then introduced with the energy-rich plasma gas into a reaction chamber surrounded by a solid reducing agent in lump form, the silica thus being brought to the molten state, being reduced and reacting with the iron to form ferrosilicon.
    公开号:SU1329623A3
    申请号:SU833566741
    申请日:1983-03-04
    公开日:1987-08-07
    发明作者:Эрикссон Суне；Сантен Свен
    申请人:Скф Стил Инджиниринг Аб (Фирма)；
    IPC主号:
    专利说明:

    11329623
    The invention relates to a derivative (p
    ferroalloys, specifically for the production of ferrosilicon from a material containing silicon dioxide, a reducing agent and a material containing iron, by direct reduction of silicon dioxide and simultaneous reaction between silicon and iron.
    The aim of the invention is to simplify and streamline the process.
    The method is carried out as follows.
    The powdered material containing silicon dioxide and the material containing iron and / or reducing agent are introduced by means of a carrier gas into the plasma generated by a plasma torch, through which the mixture enters the reaction zone formed by a solid lumpy reducing agent continuously fed to the furnace top at a rate of equal to its consumption in the reaction zone.
    Using the proposed jiopou-like raw materials makes it easier and less expensive to choose raw materials dioxide
    flint The process is also insensitive to that which turns into a lumpy
    to the electrical properties of the source material, which facilitates the selection of a reducing agent. In addition, a constant excess of a reducing agent ensures that the formation, upon receipt of extremely high SiO, will immediately restore pure ferrosilicon, so that it is flared to Si.
    by the addition of a binder consisting of C and H, and possibly also O, for example sucrose.
    The proposed method has the advantage of starting materials can be used extremely pure silicon dioxide and restoration
    Quartz sand is preferably used as the silica-containing material and is supplied together with the raw iron material (iron in the form of chips, sponge iron tablets, granulated iron). Microtablets of quartz and coal dust are particularly suitable as a starting silicon material and even for carbon. However, iron gQth SiOj can also be used as a starting material.
    containing materials, such as calcium. The proposed method allows the entire
    cynical pyrites containing an at-reaction, concentrate 66% of Fe in the form of oxides, and another zone in the immediate vicinity of materials containing iron oxide from the tuyere, which makes it possible
    since these oxides are reduced simultaneously with the reduction of nHi M silicon dioxide to silicon. Also possible mixtures of oxides of Fe and Si OF (0-SiO - faylit).
    The reducing agent introduced may be hydrocarbons, such as natural gas, coal dust, powdered charcoal, petroleum coke, which can be purified, and coke fines.
    The temperature required for the process can easily be controlled by the amount of electricity supplied with a unit of plasma, so that optimal conditions can be maintained for the lowest SiO loss.
    Since the reaction chamber is essentially surrounded on all sides by the reducing agent in a piecewise shape, the reoxidation of SiO is effectively prevented.
    The solid reducing agent (coke, charcoal and / or petroleum coke), in lumpy form, is continuously fed into the reaction zone as it is consumed.
    The plasma used in the process preferably consists of the reaction zone used in the process | gas repeatedly. The solid reducing agent may also be a powder material.
    when producing extremely high purity ferrosilicon, so that
    by the addition of a binder consisting of C and H, and possibly also O, for example sucrose.
    The proposed method has the advantage of obtaining extremely high purity ferrosilicon, so that
    as raw materials can be used extremely pure silicon dioxide and recovery
    Q agent with a very low content of impurities. Since the gas system is closed, the gas used in the process is reused, and thus all gas can be used.
    5 energy In addition, the number of ga-, calls is significantly less than in the normal process of producing FeSi. In principle, the oxidation of SiO and the problem of dust caused by
    to limit considerably the high-temperature process volume (with the known method, reduction reactions are long and spread over a large furnace volume).
    Thanks to this process scheme with all the reactions taking place in the same reaction zone in the coke shaft directly in front of the plasma torch, the reaction zone can be maintained at an extremely high and controlled temperature level. This contributes to the implementation of the reaction
    SiOj + 2C
    Si + 2CO.
    All reactants (SiO, SiO, Sic, Si, C, co) are present in the reaction zone at the same time, and the SiO and SiOo substances that are obtained in small quantities immediately react as follows:
     SiO + C - Si + CO, Sic + SiO - 2Si + COj
    2SiC + SiOj 3Si + 2CO.
    In this case, liquid silicon interacts with liquid iron contained in the reaction zone, and gaseous CO leaves the reaction zone.
    Example 1. The experiment was performed at half scale. As a starting material containing silicon dioxide, isporr, eysor grit sand with a particle size less than 1.0 mm as the starting iron material is iron shavings. The reaction zone consists of coke. Propane (LPG) is used as a reducing agent, and washed as a restoring gas consisting of CO and Nl is used as a carrier gas and plasma. Electric power 1000 kW. The starting materials are fed with 2.5 kg of SiOj and 0.4 kg of Fe in 1 minute, and the reducing agent - 1.5 kg of carbon in 1 minute.
    During the experiment, about 500 kg of ferrosilicon containing 75% Si were produced. The total cost of electricity is about 10 kWh / kg of ferrosilicon produced.
    Editor I. Nikolaichuk
    Compiled by T. Morozova Tehred M.Hodanich
    Order 3500/59 Circulation 604
    VNINPI USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d, 4/5
    Production and printing company, Uzhgorod, st. Project, 4
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    Since the experiment was conducted on a relatively small scale, the heat loss is significant. However, the loss of electricity can be significantly reduced by gas regeneration, and the heat loss is much less on a larger unit.
    权利要求:
    Claims (3)
    [1]
    1. A method for producing ferrosilicon from a raw material containing silicon dioxide, a reducing agent and an iron-containing material, by directly reducing silicon dioxide and fusing it with iron, so that, in order to simplify and reduce the cost of the process, it is carried out in a shaft plasma furnace, whereby a powdered mixture of silica, iron-containing material and / or a reducing agent is injected into a gas plasma generated by a plasma torch, by means of which the mixture is fed into the reaction zone, azo-solid lumpy reducing agent, continuously fed to the furnace top at a speed equal to its consumption in the reaction zone.
    [2]
    2. A method according to claim 1, characterized in that gas taken from the reaction chamber is used as the plasma-forming gas.
    [3]
    3. Method POP1, characterized in that powdered charcoal petroleum coke or hydrocarbons in gaseous or liquid form, such as natural gas, propane, light gasoline, are used as the reducing agent introduced into the plasma.
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    类似技术:
    公开号 | 公开日 | 专利标题
    SU1329623A3|1987-08-07|Method of producing ferrosilicon
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    CA1099520A|1981-04-21|Process for the direct production of steel
    JPS56110788A|1981-09-02|Manufacture of molten pig iron and valuable gas by utilizing coke powder
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    同族专利:
    公开号 | 公开日
    NO830389L|1984-03-09|
    DE3306910C2|1986-10-02|
    FI70259B|1986-02-28|
    ZA831401B|1984-10-31|
    SE436124B|1984-11-12|
    NO157066B|1987-10-05|
    BR8301516A|1984-04-17|
    FR2532661B1|1991-03-22|
    AU1193683A|1984-03-15|
    GB2126606B|1985-12-24|
    GB2126606A|1984-03-28|
    FR2532661A1|1984-03-09|
    CA1200393A|1986-02-11|
    GB8304721D0|1983-03-23|
    AU553732B2|1986-07-24|
    US4526612A|1985-07-02|
    FI830441L|1984-03-09|
    ES8400991A1|1983-12-01|
    ES520029A0|1983-12-01|
    JPS5950155A|1984-03-23|
    DE3306910A1|1984-03-15|
    FI70259C|1986-09-15|
    SE8205086L|1984-03-09|
    DD209658A5|1984-05-16|
    OA07396A|1984-11-30|
    FI830441A0|1983-02-08|
    SE8205086D0|1982-09-08|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2776885A|1953-01-06|1957-01-08|Stamicarbon|Process for producing ferrosilicon|
    DE1289857B|1965-03-11|1969-02-27|Knapsack Ag|Moldings for the production of ferrosilicon|
    US3759695A|1967-09-25|1973-09-18|Union Carbide Corp|Process for making ferrosilicon|
    US3704114A|1971-03-17|1972-11-28|Union Carbide Corp|Process and furnace charge for use in the production of ferrosilicon alloys|
    US4072504A|1973-01-26|1978-02-07|Aktiebolaget Svenska Kullagerfabriken|Method of producing metal from metal oxides|
    SE388210B|1973-01-26|1976-09-27|Skf Svenska Kullagerfab Ab|MAKE A REDUCTION OF METAL FROM METAL OXIDES|
    US4155753A|1977-01-18|1979-05-22|Dekhanov Nikolai M|Process for producing silicon-containing ferro alloys|
    SE8004313L|1980-06-10|1981-12-11|Skf Steel Eng Ab|SET OF MATERIAL METAL OXIDE-CONTAINING MATERIALS RECOVERED SOLAR METALS|
    SE429561B|1980-06-10|1983-09-12|Skf Steel Eng Ab|SET FOR CONTINUOUS PREPARATION OF LOW CARBON CHROMES OF CHROMOXIDE CONTAINING MATERIALS USING A PLASMA MAGAZINE|
    GB2077768B|1980-10-29|1984-08-15|Skf Steel Eng Ab|Recovering non-volatile metals from dust containing metal oxides|
    ZA811540B|1981-03-09|1981-11-25|Skf Steel Eng Ab|Method of producing molten metal consisting mainly of manganese and iron|JPH0113898B2|1984-10-16|1989-03-08|Kagaku Gijutsucho Kinzoku Zairyo Gijutsu Kenkyu Shocho|
    FR2573437B1|1984-11-21|1989-09-15|Siderurgie Fse Inst Rech|PROCESS FOR THE CONDUCT OF A BLAST FURNACE, ESPECIALLY A STEEL BLAST|
    DE3535572C2|1985-10-03|1987-10-15|Korf Engineering Gmbh, 4000 Duesseldorf, De|
    US4680096A|1985-12-26|1987-07-14|Dow Corning Corporation|Plasma smelting process for silicon|
    DE3800239C1|1988-01-07|1989-07-20|Gosudarstvennyj Naucno-Issledovatel'skij Energeticeskij Institut Imeni G.M. Krzizanovskogo, Moskau/Moskva, Su|
    GR1000234B|1988-02-04|1992-05-12|Gni Energetichesky Inst|Preparation method of ierro-sicicon in furnaces for electric energy generation|
    AT115087T|1988-03-11|1994-12-15|Deere & Co|MANGANE CARBIDE AND IRONPRODUCTION.|
    US4898712A|1989-03-20|1990-02-06|Dow Corning Corporation|Two-stage ferrosilicon smelting process|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE8205086A|SE436124B|1982-09-08|1982-09-08|SET TO MAKE PROCESS|
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