• 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:
    A method and apparatus for the continuous direct reduction of metal oxides, ores, etc. to a hot metallized product in solid form. A gas unique seal is employed to prevent the leakage of reduction gas from the bottom of the closed shaft furnace when the product is being discharged which does not affect the discharge temperature of the product.
    公开号:SU1082328A3
    申请号:SU792809602
    申请日:1979-09-07
    公开日:1984-03-23
    发明作者:Бегз Дональд；Милтон Эскотт Роберт
    申请人:Мидрекс Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    2, the method according to claim 1, from which the gas from an external source is added to the circuit. 3. A central processing unit for direct production of spongy iron, socialized. shaft furnace, units of loading and unloading. product, sealed chamber, uzep briquetting, enclosed in an airtight container, from 10 28 characterized in that it is equipped with an external circuit consisting of connected pressure sensor, additional gas input units and cleaning, pump and heater, and the circuit is connected a shaft furnace with a shaft furnace below the point of entry of the reducing gas and with the upper part of the sealed chamber.
    The invention relates to the direct reduction of oxides of metals, ores and similar materials to produce a metal product, and this product is discharged at a high temperature, which is especially convenient for carrying out the briquetting process or other compaction methods. Cold-unloaded kilns have been widely used in industry, designed to directly reduce iron ores to iron gaining from the C 1 sponge. However, by simply eliminating the cooling devices from the kiln to directly restore, it is impossible to get a good hot-unload kiln. Usually, in countercurrent shaft furnaces and, in particular, in shaft furnaces for the direct reduction of iron, the highest pressure in the furnace is always created in its lower part in order to carry out an upward flow of gases. In direct reduction of iron, the gases in the furnace are highly combustible due to the high content of carbon monoxide and hydrogen, which are necessary for the reduction of iron. The closest to the invention to the technical essence and the achieved result is the method of direct production of sponge iron in a furnace of dispersed metal ores, including countercurrent movement of ore fed from above and circulating reducing gas, cooling, unloading into a sealed container and subsequent briquetting, and method, containing a kiln furnace, units for loading and unloading the product, a sealed chamber and a briquetting unit enclosed in a hermetic sacred container 23. However, in shaft furnaces containing high-combustible gases, there is a danger of fire in the discharge zone of the furnace from which the treated ones are unloaded; particulate matter. It presents a danger to both the maintenance staff and the equipment itself. This danger is particularly great when the discharged combustible materials are sent for further processing, for example for combustible briquetting of iron after direct reduction. Thus, the main problem that needs to be solved is that the outlet for unloading the furnace must be equipped with a device for preventing the leakage of furnace gas. To this end, mechanical valves or locks are used in direct reduction furnaces with hot discharge. However, the specified mechanical. the devices stick as the softening and sticking of the hot reduced iron product occurs. This usually causes leakage through such valves. The aim of the invention is to eliminate the leakage of the gaseous reducing agent. The goal is achieved by the method of directly obtaining sponge iron in a shaft furnace from dispersed metal ores, including countercurrent movement of ore fed from above and circulating reducing gas, cooling and unloading into a sealed container followed by briquetting, into the upper part of the cooling zone under pressure above the momentum gas is supplied at a temperature of 650, which is drawn off from a sealed container. Circulation is added to the circuit from an external source. A direct iron receiving unit, containing a blast furnace, an unloading and unloading unit, a sealed chamber, a briquetting unit enclosed in a sealed container, is equipped with an external circuit consisting of pressure input units the amount of gas and cleaning, pump and heater, and the circuit is connected by a pipe with a shaft furnace below the point of input of the reducing gas and with the upper part of the sealed chamber. In accordance with the invention, a shaft furnace for direct reduction of iron with hot unloading works in conjunction with a hot briquetting machine, in which a direct reduced iron containing product is compacted. Although the hot brik tyryrov machine is directly connected with the furnace loading, it is separated from the high combustible gases, which are at a relatively high pressure in the reduction furnace, and shut off the gas located in the lower zone of the furnace. This shut-off gas system ensures that the gases that are released during unloading cannot be ignited and very high fire & chi, despite the danger. The proposed furnace does not have mechanical locks designed to limit the leakage of gaseous reductant or flue gases through the product discharge window. FIG. 1 shows a furnace associated with a briquetting apparatus, a vertical section; in fig. 2 is a diagram of the proposed furnace in combination with a hot discharge container. The vertical shaft furnace 1 includes a supply funnel 2, placed on top of the furnace. Through this funnel, the furnace is loaded with granulated ferric oxide 3 or other crushed raw materials, such as pin ore. Under the action of the intrinsic resin, the granules through one or several feeding pines 4 enter the layer 5 or the mixture of crushed material containing iron oxide. In the center of the shaft furnace there is a hot gas supply system - lance 6. This system contains gas channels 7, through which hot gas flows - reducing agent. The OOTOK of the reducing gas is directed upwards and is in countercurrent with respect to the movement of the charge 5. The exhaust gas is diverted to the verification through the vapor line 8. In the bottom of the furnace 1 there is a -. VII 9 for unloading of granules, which connects the internal cavity of the furnace with a small funnel 1О or a gas separating chamber. The funnel or chamber is filled with hot granules, which come under the influence of their own gravity from the lower zone of the furnace. The discharge line 9 enters the funnel 10 to form a gas separating tank 11. Since the diameter of the funnel is larger than the diameter of line 9, the unloading ampoules form an angle 12 of repose through which the blocking gas enters the funnel 10. From the pop station 11, the gas stream of the gas gate is retracted through the outlet canap 13. To remove solid and condensable materials from the gas of the gas gate and to preheat these gases to the required temperature before being fed into the corresponding zone of the furnace, the gas cleaning and recycle circuit is used. Gas shutoff off-gases through the exhaust line 14 enter the cooling scrubber 15, in which the condensable and crushed materials are removed. The cleaned gas from the gas is pumped by a pump or compressor 16 to the heater 17, in which the gas is heated to an inlet temperature of 60 O-80 O C, preferably 65 O-75 O ° C. This temperature is preferred for discharging the granular product. From the heater, the gas is returned to the furnace 1 via supply gas line 18 through the gas distributor 19. Heater 17 is heated using burners 20 fed from an air source and a fuel source 21. Under the funnel 10 there is a briquetting machine 22, including rotating ones. towards each other, aly 23 and 24, which press the recovered granules into a briquetted product. Hot briquetted product can be discharged into the holoci
    权利要求:
    Claims (1)
    [1]
    1. A method for the direct production of spongy iron in a shaft furnace from cisperon metal ores, including countercurrent movement of the ORE and circulating reducing gas supplied from above, cooling and unloading into a hermetized container followed by briquetting, which differs in that, in order to prevent leakage of a gaseous reducing agent, gas with a temperature of 650-750 ° C is supplied to the upper part of the cooling zone under a pressure above atmospheric, the removal of which is carried out from a sealed container.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1082328A3|1984-03-23|Method and apparatus for direct production of iron sponge
    US3443931A|1969-05-13|Process for making metallized pellets from iron oxide containing material
    JP2004300578A|2004-10-28|Reducing gas former for metal production
    US3862294A|1975-01-21|Method for flash calcining inorganic materials
    KR950704515A|1995-11-20|PROCESS AND DEVICE FOR PRODUCING PIG IRON FROM IRON ORE OR THE THERMALLY AND / OR CHEMICALLY TREATING AN EASILY DECOMPOSABLE MATERIAL
    CA1070942A|1980-02-05|Rotary kiln for roasting ores, slags, ashes and other materials
    US4251267A|1981-02-17|Method for direct reduction of metal oxide to a hot metallized product in solid form
    US4008074A|1977-02-15|Method for melting sponge iron
    US3235375A|1966-02-15|Process for the reduction of iron oxide
    KR100673785B1|2007-01-23|Facilities for reducing metal oxide, method for operating the facilities and moldings as law material to be charged to reduction furnace
    KR100435439B1|2004-06-10|apparatus for recycling self-generated sludge in non-coking coal and fine ore based ironmaking
    KR100318121B1|2001-12-22|Process and apparatus for producing metal from metal ores
    US3457141A|1969-07-22|Charging of preheated coal into the coking chambers of a coke oven battery
    US4326883A|1982-04-27|Process for deoiling and agglomerating oil-bearing mill scale
    US3585023A|1971-06-15|Method and apparatus for reduction of iron ore
    US3900696A|1975-08-19|Charging an electric furnace
    US2090386A|1937-08-17|Method and apparatus for roasting ore
    US3523065A|1970-08-04|Charging of preheated coal into the coking chambers of a coke oven battery
    US4181520A|1980-01-01|Process for the direct reduction of iron oxide-containing materials in a rotary kiln
    US3918929A|1975-11-11|Process for post-treating hot briquettes and the like
    US3011772A|1961-12-05|Rotary ore-reducing kiln
    US2103088A|1937-12-21|Apparatus for treating ores
    US3116996A|1964-01-07|Method and apparatus for handling fines in a briquetting operation
    US1832069A|1931-11-17|Method of roasting ores
    US663089A|1900-12-04|Method of making chlorin.
    同族专利:
    公开号 | 公开日
    US4188022A|1980-02-12|
    DE2935707C2|1986-07-17|
    CA1119813A|1982-03-16|
    DE2935707A1|1980-03-20|
    GB2032594B|1982-09-08|
    AU4965279A|1980-03-13|
    GB2032594A|1980-05-08|
    MX151937A|1985-05-08|
    AU526797B2|1983-02-03|
    AR218996A1|1980-07-15|
    JPS5538995A|1980-03-18|
    ZA794289B|1980-09-24|
    EG14104A|1983-03-31|
    FR2435530A1|1980-04-04|
    JPS5756528B2|1982-11-30|
    MY8400367A|1984-12-31|
    BR7905516A|1980-05-20|
    FR2435530B1|1984-02-24|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2590029C1|2015-01-12|2016-07-10|Общество с ограниченной ответственностью "Научно-производственное внедренческое предприятие ТОРЭКС"|Method for production of sponge iron and shaft furnace therefor|
    RU2590031C1|2015-01-12|2016-07-10|Общество с ограниченной ответственностью "Научно-производственное внедренческое предприятие ТОРЭКС"|Method for direct production of sponge iron using gas-oxygen conversion and shaft furnace therefor|US2591789A|1948-06-24|1952-04-08|Brassert & Co|Apparatus for reducing metallic oxides|
    US2999748A|1958-11-27|1961-09-12|Elektrokemisk As|Process of reducing molded bodies comprising metallic oxides|
    US3850616A|1973-10-29|1974-11-26|Armco Steel Corp|Inert gas seal for product discharge from a shaft furnace|
    US3836131A|1973-12-26|1974-09-17|Mildrex Corp|Apparatus for cooling a moving bed of solid, gas permeable particles|US4280840A|1979-11-08|1981-07-28|Pullman Incorporated|Method of processing sponge iron|
    DE3034539C2|1980-09-12|1982-07-22|Korf-Stahl Ag, 7570 Baden-Baden|Method and device for the direct production of liquid pig iron from lumpy iron ore|
    CA1204287A|1982-03-22|1986-05-13|Frank V. Summers|Method of generating a reducing gas|
    US4897113A|1985-09-23|1990-01-30|Hylsa, S.A.|Direct reduction process in reactor with hot discharge|
    US5296015A|1990-01-09|1994-03-22|Hylsa S.A. De C.V.|Method for the pneumatic transport of large iron-bearing particles|
    DE4224055C1|1992-07-21|1993-12-16|Koeppern & Co Kg Maschf|Redn. of iron@ ore into solid metallised ferrous prod. - moves ferrous sludge briquettes with min. heat loss to the refining vessel to save energy consumption|
    AT404361B|1995-01-23|1998-11-25|Voest Alpine Ind Anlagen|METHOD AND DEVICE FOR COOLING HOT IRON SPONGE|
    DE19623246C1|1996-05-30|1997-10-02|Voest Alpine Ind Anlagen|Loading of melting gasifier with gasifying agents and sponge iron@|
    AT406963B|1998-08-12|2000-11-27|Voest Alpine Ind Anlagen|METHOD FOR PRODUCING IRON BRIQUETTES AND / OR COLD IRON SPONGE|
    JP4053190B2|1999-06-24|2008-02-27|東邦化学工業株式会社|Method for producing heated pavement material excellent in peeling prevention|
    IT1315147B1|2000-11-14|2003-02-03|Danieli Off Mecc|OVEN FOR THE DIRECT REDUCTION OF IRON OXIDES|
    CN100494409C|2006-11-29|2009-06-03|周广砥|Blast-furnace for reducing sponge iron|
    AT505490B1|2007-06-28|2009-12-15|Siemens Vai Metals Tech Gmbh|METHOD AND DEVICE FOR PRODUCING IRON SPONGE|
    CN105143802A|2012-10-18|2015-12-09|特诺恩矿产私人有限公司|Heating apparatus and gas distributor for use in the heating apparatus|
    EP3255157A1|2016-06-09|2017-12-13|Primetals Technologies Austria GmbH|Method for direct reduction with dry vent gas dust removal|
    EP3255158A1|2016-06-09|2017-12-13|Primetals Technologies Austria GmbH|Method and apparatus for direct reduction using vent gas|
    EP3763832A1|2019-07-08|2021-01-13|Primetals Technologies Austria GmbH|Sealing of a reduction unit|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/940,806|US4188022A|1978-09-08|1978-09-08|Hot discharge direct reduction furnace|
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