• 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:
    The invention relates to the field of ferrous metallurgy, specifically to the management of blast furnace smelting. The purpose of the invention is to increase the furnace productivity or at least temporarily change the composition of the smelting products. The essence of the invention is that the furnace productivity and the composition of cast iron are regulated by changing the flow rate and type of ore materials in a ground form with the help of a transporting agent (gas, liquid) in or near the tuyere zones of the blast furnace. At the same time, the gas-dynamic and thermodynamic conditions in the blast furnace are maintained unchanged: the total flow rate of oxygen gasified in the tuyere zones, the flow rate and temperature of the tuyere gases. The energy needed to restore and melt the ore substances injected into the tuyere zone is introduced by changing the enthalpy of the gas flow injected through tuyeres using, for example, a plasma torch, which ensures the constant amount of the melted charge materials loaded through the throat and, therefore, smelting of iron. Increased productivity and expansion of the range of smelting products (for example, the production of chromium-alloyed cast iron) is achieved due to the ore materials blown into the tuyere zones. 4 hp ff, 1 tab.
    公开号:SU1500165A3
    申请号:SU853976890
    申请日:1985-11-20
    公开日:1989-08-07
    发明作者:Мишар Жан-Алекс；Де Сэн Мартэн Люсьен
    申请人:Энститю Де Решерш Де Ля Сидерюржи Франсэз (Фирма)；
    IPC主号:
    专利说明:

    about
    SP
    This invention relates to the steel industry, specifically to the management of blast furnace smelting.
    The aim of the invention is to increase the productivity of the furnace or at least temporarily change the composition of the smelting products.
    The charge materials are charged into the blast furnace through the top of the furnace; in the tuyere zones they supply heated blast into the air heaters with adjustable flow, heating and composition. At the same time, crushed solid oxidized or partially reduced ore materials containing iron and / or other iron-forming elements are introduced into or near the tuyere zones with or through a transporting agent (gas or liquid).
     S
    At the same time, the total flow rate of the ore introduced into the tuyere zones, including its arrival with blast, with the recovered oxides of ore materials introduced into the tuyere zones, as well as oxygen transported by the ore materials delivered by blowing ore into the air and / or gaseous agents of nitrogen and / or hydrocarbons transporting them while maintaining a constant total flow rate of tuyere gases produced in the furnace by changing the flow rate simultaneously with the input of these components, and the required energy consumption is restored The occurrence and melting of ore materials introduced into the tuyere zones provide a change in the enthalpy of tuyere gases.
    Observance of the specified conditions allows to ensure the constancy of chemical and TeiraoBoro potential of tuyere gases generated per unit of time, necessary for the constancy of the amount of pig iron supplied from the charge loaded irrespective of the consumption of ore materials blown into tuyere zones and, therefore, the possibility increase the productivity of the furnace while increasing their consumption. In addition, the choice of injected ore materials containing various iron-forming components expands the range of cast iron and, in particular, makes it possible to produce chromium-alloyed cast iron by blowing in chromium-containing ore in pure form or mixed with iron ore.
    Thus, the invention allows, without noticeable disruption of the normal operation of the blast furnace, to produce pig iron or chrome-containing alloyed iron (or both), depending on the type of ore being blown, consuming only thermal energy from an external source, and the amount of carbon required by D / I am carburizing this cast iron.
    The table presents the characteristics of the blast furnace, equipped with 28 tuyeres.
    As can be seen from the table (column 2), the blast furnace at maximum intensity produces 600 tons of pig iron per day at a coke consumption of 450 kg / t.
    pig iron and coke burned to about 2,700 tonnes per second.
    When blowing in iron tuyeres
    ORE With a granulometry of less than 1 mm in the amount of 10% of iron introduced in relation to cast iron produced in the base period (from fir loaded through the throat), production
    pig iron is 6500 t / s (column 3 of the table).
    Simultaneously with this feed, the ore is blown into the tuyeres, for example, using plasma torches.
    air, so that the energy applied by the plasma torches covers the heat demand for the reduction and melting of the ore fed to the nozzles. At the same time, the total consumption of blowing is 902 of 1 ton of pig iron, and its temperature is raised to 1777 C. These parameters are achieved by adjusting the plasma torches so that they can supply 288 kW of useful energy per ton of pig iron. An increase in the temperature of the blast is envisaged to ensure the heat expenditures for the reduction and smelting of the injected ore, which allows preserving the temperature of the tuyere gases and eliminating the expenditure of metallurgical coke necessary for meeting the thermal and chemical needs when melting charge materials charged through the top of the base period.
    As a result, coke consumption per ton of manufactured iron is reduced by more than 35 kg.
    compared with the base period, and the amount of coke burned remains almost unchanged, which provides for the smelting of charge materials loaded through the throat.
    Heating of the air supplied to the tuyeres can be achieved by mixing the main stream of air coming from the air heaters at 1200 C, supplemented by an auxiliary stream of plasma air, brought to an elevated temperature by means of plasma torches.
    Oxygen supplied by the feed ore is also taken into account. The condition of its flow rate is mainly maintained by nitrogen supplementation, which in this example rises to 103 nm per ton of pig iron.
    The total consumption of blown into the tuyeres is 902 nm per 1 ton of pig iron, and its temperature is raised to. To this flow, supplied from the outside, in the burning zone of the nozzles is added the gas produced by direct reduction of the introduced iron ore, which ensures the constancy the flow rate of tuyere gas
    The addition of nitrogen eliminates the drawbacks of the effect of enrichment of air with oxygen, which would have occurred in the tuyere zone during the dissociation of the introduced oxides of the simplified reaction.
    FcxO-xFe + 1 / 20a.
    In column 4 of the table, the degree of reduction is 50%, in a ratio of 10% to cast iron, (mass units).
    The amount of coke burned is identical in columns 2 and 3.
    Since the ore is preliminarily reduced by 50%, its thermal requirements are less than the needs of unprocessed ore.
    The useful energy supplied by the torches is reduced in this case to 161 kW. h on I t of iron. The addition of nitrogen is also reduced to 51 nm per ton of iron, i.e. more than half compared to the previous case.
    The total flow rate of the supplied gas, which increases to 903 nm per ton of pig iron, is approximately equal to the flow rate shown in the table in column 3, and its temperature is lower (1,521 ° C), which is sufficient to cover the heat demand of the pre-reduced ore without interfering with internal operation. blast furnace with respect to charge materials loaded through the throat, since the parameters of tuyere and flue gases are identical to their parameters in the basic mode.
    The mode shown in column 5 of the table indicates a possible increase in furnace capacity and bringing it up to 7,000 tons / day. This result is achieved simply (m by introducing a pre-reduced ore by 50% in an amount of 20 wt.% Iron relative to cast iron.
    The invention is generally applied to supply any ore material containing iron oxides 10
    15
    20
    25
    001656
    razukhdikh elements, in particular chrome ore or a mixture with iron-containing materials (scale, welding slag, steel fines).
    In this case, the blast furnace operates as a single two-stage reactor, from which the stages specializes in the production of various products, exchanging materials and heat without mutual interference, the lower stage, namely the nozzle zone, producing chromium iron from the introduced ore, and the upper part, in the usual way producing basic cast iron. Both liquid phases are collected in the hearth and form cast iron doped with chromium.
    The use of the invention allows to quickly increase the productivity of the blast furnace and also quickly move to the production of the required range of pig iron in a wide range.
    权利要求:
    Claims (5)
    [1]
    1. A method of controlling a blast furnace, including the flow into the furnace of a blow heated in a regenerator: for controlling its consumption, entering into the tuyere zone or in the region of its solid oxidized or partially reduced ore materials transported by gaseous or folding materials areHTahSH, that is that, in order to keep the furnace productivity; at least a temporary change in the composition of the smelting products, maintain constant the total oxygen intake introduced into the tuyere zone by blasting, ores of ore materials and agents, ores, and the total flow of gases from the lower zone of the furnace.
    [2]
    2. A method according to claim I, characterized in that, in order to maintain a constant total oxygen supply, nitrogen is introduced into the tuyere zone.
    [3]
    3. A method according to claim 2, characterized in that the nitrogen introduced into the tuyere zone is partially heated by gas burners.
    [4]
    4. A method according to claim 1, characterized in that, in order to maintain a constant total oxygen supply, hydrocarbons are introduced into the tuyere zone.
    [5]
    5. The method according to p. 1, characterized by the fact that as ores
    Editor N.Laaarenko
    Compiled by A.Dunaev Tehred M.Hodanich
    Order 4716/59
    Circulation 530
    VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab., 4/5
    Chromium-containing ore or its mixture with iron ore is injected.
    Proofreader M.Samborsk
    Subscription
    类似技术:
    公开号 | 公开日 | 专利标题
    JP2698525B2|1998-01-19|Smelting reduction method of metal ore
    RU2106413C1|1998-03-10|Method of pig iron production
    KR0131266B1|1998-04-17|Process for the production of iron using converter
    US2750277A|1956-06-12|Process and apparatus for reducing and smelting iron
    US5613997A|1997-03-25|Metallurgical process
    US4072504A|1978-02-07|Method of producing metal from metal oxides
    US4340420A|1982-07-20|Method of manufacturing stainless steel
    SU1500165A3|1989-08-07|Method of controlling blast furnace
    SU869562A3|1981-09-30|Method of producing metal from its oxides
    RU93004952A|1996-09-20|METHOD FOR PRODUCING LIQUID IRON OR STEEL MELT AND INSTALLATION FOR ITS IMPLEMENTATION
    US4551172A|1985-11-05|Process of producing liquid carbon-containing iron
    CS212727B2|1982-03-26|Method of recovering non-volatile metals from dusty charge materials containing metal oxides,especially chromium oxides
    US3264096A|1966-08-02|Method of smelting iron ore
    RU2005126707A|2006-02-10|IMPROVED METHOD OF Smelting for iron production
    US5632953A|1997-05-27|Process and device for melting iron metallurgical materials in a coke-fired cupola
    US5946340A|1999-08-31|Process for melting of metal materials in a shaft furnace
    KR100321440B1|2002-07-31|Process for producing liquid metal and facilities for carrying out the process
    US1349598A|1920-08-17|Process for treating ores in blast-furnaces
    US4001008A|1977-01-04|Method and apparatus for the reduction of ores, especially iron ores
    SU1069632A3|1984-01-23|Method for making ferromanganese or ferrosilicon-manganese
    US3295955A|1967-01-03|Smelting method and device
    US3511644A|1970-05-12|Process for reducing and carburizing melting of metallic material in a rotary furnace
    US3832158A|1974-08-27|Process for producing metal from metal oxide pellets in a cupola type vessel
    AU680212B2|1997-07-24|Metallurgical processes and apparatus
    RU2319749C2|2008-03-20|Method of the direct production of iron, in particular steels, and installation for its implementation
    同族专利:
    公开号 | 公开日
    ZA858727B|1986-07-30|
    FR2573437A1|1986-05-23|
    EP0182730B1|1990-09-12|
    BR8505820A|1986-08-12|
    JPS61199006A|1986-09-03|
    AT56473T|1990-09-15|
    US4707183A|1987-11-17|
    DE3579672D1|1990-10-18|
    CA1256703A|1989-07-04|
    FR2573437B1|1989-09-15|
    EP0182730A1|1986-05-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1917642A|1930-06-23|1933-07-11|Clifford C Furnas|Process of controlling the temperature gradient up the shaft of a furnace|
    DE822089C|1948-10-02|1951-11-22|Thyssensche Gas Und Wasserwerk|Process for the direct extraction of steel from iron ores and scrap|
    FR1340858A|1962-07-31|1963-10-25|Siderurgie Fse Inst Rech|Method and device for increasing the production of blast furnaces|
    BE799791A|1973-05-18|1973-09-17|Centre Rech Metallurgique|PROCESS FOR REDUCING ORE.|
    BE814899A|1974-05-10|1974-11-12|PROCESS FOR MANUFACTURING HOT REDUCING GAS.|
    JPS5651509A|1979-09-28|1981-05-09|Ishikawajima Harima Heavy Ind Co Ltd|Dust recovering method from blast furnace top gas|
    BE883667A|1980-06-05|1980-12-05|Centre Rech Metallurgique|PROCEDE DE CONDUITE D'UN FOUR A CUVE|
    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|
    FR2500478B2|1980-07-15|1986-11-14|Siderurgie Fse Inst Rech|PROCESS FOR REDUCING THE CONSUMPTION OF REDUCING AGENTS IN AN APPARATUS FOR REDUCING AND FUSING METAL ORES, ESPECIALLY IN A BLAST STEEL FURNACE|
    JPS5896803A|1981-12-01|1983-06-09|Sumitomo Metal Ind Ltd|Operating method for blast furnace|
    JPS58100606A|1981-12-08|1983-06-15|Sumitomo Metal Ind Ltd|Production of chromium-containing pig iron by blast furnace|
    SE434650B|1982-06-09|1984-08-06|Skf Steel Eng Ab|SEE USE OF PLASM MAGAZINE TO RAISE THE BLESTER TEMPERATURE IN A SHAKT OVEN|
    SE436124B|1982-09-08|1984-11-12|Skf Steel Eng Ab|SET TO MAKE PROCESS|
    FR2540518B1|1983-02-03|1991-09-06|Siderurgie Fse Inst Rech|PROCESS FOR CONDUCTING A METALLURGICAL FUSION OVEN AND DEVICE FOR IMPLEMENTING IT|US4769065A|1987-05-08|1988-09-06|Electric Power Research Institute|Control of a plasma fired cupola|
    US4780132A|1987-05-08|1988-10-25|Electric Power Research Institute|Plasma fired cupola|
    US4853033A|1988-06-29|1989-08-01|Electric Power Research Institute|Method of desulfurizing molten metal in a plasma fired cupola|
    US5363312A|1990-03-30|1994-11-08|Kabushiki Kaisha Toshiba|Method and apparatus for battery control|
    US5377960A|1993-03-01|1995-01-03|Berry Metal Company|Oxygen/carbon blowing lance assembly|
    DE102006029725B4|2006-06-28|2008-08-28|Siemens Ag|Method and device for introducing dusts into a molten metal of a pyrometallurgical plant|
    US9574770B2|2012-04-17|2017-02-21|Alter Nrg Corp.|Start-up torch|
    JP6258039B2|2014-01-07|2018-01-10|新日鐵住金株式会社|Blast furnace operation method|
    KR102006432B1|2019-03-06|2019-08-05|대한민국|Experimental method for restoring ancient furnace|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR8418075A|FR2573437B1|1984-11-21|1984-11-21|PROCESS FOR THE CONDUCT OF A BLAST FURNACE, ESPECIALLY A STEEL BLAST|
    [返回顶部]