• 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 metallurgy and, in particular, the production of sponge iron or cast iron from iron ore that is reduced in a shaft furnace and melted in a smelting gasifier. The purpose of the invention is to increase the carbon content in a spongy iron or liquid iron. The hot reducing gas produced in the melting gasifier 2, located under the reducing shaft furnace 1, is cooled and fed into the shaft furnace 1 through the inlets 6, as well as through the discharge pipes 7 connected to the melting gasifier 2. it reduces the amount of reducing gas supplied through the discharge pipes 7. Both gas streams are cooled to such an extent that their temperature at the entrance to the reduction shaft furnace is in the 650-850 ° C for gas supplied to the bottom and 750-950 ° C for gas supplied through a cyclone to the collector 5. The recovery time in the shaft furnace is 1-4 hours. At the same time, the resistance of the mixture to gas supplied through the collector 5 , corresponds to 10-100 mbar. The ratio of the distance between the upper and lower levels of gas supply to the diameter of the shaft in this part is 0.5-1.0. The invention makes it possible to increase the carbonization of sponge iron, and due to this, cast iron. 2 sec. and 7 hp ff, 2 ill.
    公开号:SU1503686A3
    申请号:SU853966905
    申请日:1985-10-11
    公开日:1989-08-23
    发明作者:Хаук Рольф
    申请人:Корф Инжинееринг Гмбх (Фирма)；
    IPC主号:
    专利说明:

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    The reducing gas produced in the melting gasifier 2, located under the reduction shaft furnace 1, is cooled and fed into the shaft furnace I through the inlets 6, as well as through the discharge Tpy6lj 7 connected to the melting gasifier.

    raeom resistance layer of the charge, the elimination of the distance between the top and
    limits 650-850 С for gas supplied to the bottom part and 750-950 ° С for
    the gas supplied through the cyclone to the collector 5. The duration of the ascent in the shaft furnace is 1–4 hours. In this case, the resistance of the charge gas to the gas supplied through the collector 5 corresponds to 10-100 mbar. 0t
    To reduce the amount of reducing gas supplied through the discharge pipes 7. Both gas streams are cooled to such an extent that their temperature at the entrance to the reduction shaft furnace is in
    The invention relates to metallurgy, to the production of sponge iron or pig iron from iron ore, which is reduced in a shaft furnace and melted in a smelting gasifier,
    The purpose of the invention is to increase the carbon content in a sponge iron or liquid iron.
    FIG. 1 shows an apparatus for producing iron from iron ore with a smelting gasifier; Fig. 2 shows a device for producing sponge iron from iron ore with a coal gasifier.
    The device for direct production of molten iron from lump ore consists of a reduction shaft furnace 1 and a melting gasifier 2. Iron ore is introduced into the upper part of the shaft furnace I through the charging port 3, and the top gas generated in it is removed from the upper part of the furnace through the outlet 4 The reduction of iron ore fed to the reduction furnace 1 occurs mainly above the level of the ring collector 5, at the height of which it is introduced through the inlets arranged in a ring-like manner around the perimeter. knye openings 6 a reducing gas at 850 C.
    The reducing shaft furnace 1 and the melting gasifier 2 located under it are interconnected by means of drain pipes 7. At one end, these drain pipes 7 terminate in holes in the bottom of the reduction shaft furnace 1, and the other ends in holes in the upper part
    the lower levels of gas supply to the diameter of the shaft in this part is 0.5-1.0. The invention makes it possible to increase the carburization of sponge iron, and thereby also pig iron. 2 sec. and 7 hp f-ly, 2 ill.
    0
    five
    five
    0
    five
    0
    five
    melting gasifier 2. They serve to transfer the sponge iron formed as a result of reduction of iron ore from the reduction shaft furnace 1 to the melting gasifier 2, as well as to supply the reducing gas formed in the melting gasifier 2 to the lower part of the shaft furnace I. The melting gasifier 2 at a temperature of about 1000 ° C is cooled to such an extent that it has a temperature of about 700 ° C at the entrance to the reduction shaft furnace 1. c by adding to the reducing gas an appropriate amount of cooling gas supplied to the discharge pipes 7 from the distribution pipe 8 via the pipeline 9.
    In addition, the reducing gas is removed from the melter gasifier 2 through line 10, to which is added cooling gas supplied through line 11 in such a quantity that the temperature of the gas after displacement would be approximately 850 ° C. This gas is purified in cyclone 12 from dust particles and then introduced into the recovery shaft furnace 1 at the level of the annular collector 5. The dust collected in the cyclone 12 through pipeline 13 is returned to the smelting gasifier 2,
    Carbon deposition depends not only on the reaction temperature, but also on the amount of reducing gas entering the reduction shaft furnace 1 through the descent pipes 7, and also on the residence time of sponge iron in this gas flow. It can also be adjusted by selecting the appropriate dimensions of a part of the reduction shaft furnace 1, located below the annular collector 5. The possibility of regulating the carburization rate in the lower part of the shaft furnace 1 consists in selecting dynamic resistances for both reducing gas streams, Dp of maximizing the gas flow through the discharge pipes 7, you can increase the pressure loss in the cyclone 12, as well as the ratio between the cross section of the shaft furnace 1 below the plane of the annular collector 5 and the distance between this plane and the inlet 6 of the discharge pipes 7 shaft furnace. The ratio between the amounts of reducing gas supplied through the discharge pipes 7 and at the height of the annular manifold 5 is in the range of 0.1-0.5. Preferably it is 0.3. The magnitude of the dynamic resistance of the on-line reducing gas supply at the level of the annular collector 5 is selected so that it corresponds to a pressure drop of 1.0-100 Mb ar.
    The residence time of reduced iron in the space between the level of the collector 5 and the inlet openings 6 of the discharge pipes 7 in the bottom of the reduction furnace is IA, preferably 3 hours. A large residence time of sponge iron in the reducing gas flow along the discharge pipes 7 is achieved by maximizing the increase the volume of the reduction shaft furnace 1 between the level of the collector 5 and the plane of the holes in the shaft furnace 1 with which the exhaust pipes 7 terminate. With an increase in the cross section of the mine
    kilns below collector level 5; jq of solid gas can only be precipitated
    increase the volume of the shaft furnace I in this place. The ratio of the distance between the level of the collector 5 and the inlet openings 6 of the discharge pipes 7 at the bottom of the reduction shaft furnace 1 to its diameter in this place is within 0.5-1. The dynamic resistance can also be changed by a corresponding change in the cross section of the pipe.
    a small amount of carbon, especially in cases where the CO content in the gas is more than 3%. Therefore, the method is carried out in two stages. At the first stage, the iron ore is reduced at a temperature of about 850 ° C, after which the resulting sponge iron is carburized with more

    ten
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    03686
    pipelines and creating additional pressure loss in the manifold 5.
    In the device shown in FIG. 2, those parts thereof that correspond to parts of the device in accordance with FIG. 1 are denoted by the same positional numbers. The significant difference between the two devices is that in the device in accordance with FIG. 2, instead of a melter gasifier, there is a coal gasifier 14, in which, in a known manner, coal and oxygen is obtained to carry out the process in the reduction furnace I and the reducing gas. Since the resulting gas at the outlet from the gasifier 14 has a temperature of about 1500 ° C, it is first cooled in system 15 for heat recovery to 1000 ° C, after which it is divided into two streams. In this case, one stream after cooling prior to mixing with the cooling gas supplied through the pipeline 11 and dedusting in the dust collecting device 16 is fed through the pipeline 10 to the recovery shaft furnace 1 at the height of the collector 5, and the second after cooling to the cooling gas served at the bottom of the furnace. In this case, the openings through which the sponge iron is led out of the shaft furnace 1 are separated from the outlet openings in the lower part of the furnace, through which reduction gas flows into it. And in this case, the cross section of the shaft furnace 1 below the plane of the co.plector 5 is larger than in its upper part. Carburizing sponge iron in this device is the same as in the device in accordance with FIG. one.
    25
    thirty
    35
    40
    45
    The reduction of iron ore is carried out at a temperature of about 850 ° C. At this temperature, from reduction
    a small amount of carbon, especially in cases where the CO content in the gas is more than 3%. Therefore, the method is carried out in two stages. In the first stage, the reduction of iron ore is carried out at a temperature of about 850 ° C, after which the resulting sponge iron is carburized with more
    low temperature, preferably at 650-750 s.
    The method allows to regulate and increase the carbon content in the resulting spongy iron and, respectively, cast iron.
    I
    权利要求:
    Claims (4)
    [1]
    Invention Formula
    1. A method for producing sponge iron or liquid iron from iron ore, inclusive, supplying the shaft furnace at the level of the annular collector of the reducing gas with the temperature TZO-EZO C, mixing the reducing gas from the gas generator with the cooling gas and supplying it in an amount less than 0 , 3 quantities supplied at the level of the annular collector to the bottom of the shaft furnace, characterized in that, in order to increase the carbon content in the spongy iron or liquid iron, the temperature is restored to the vital gas, In the bottom part, set 650-850 C.
    2. The method according to claim 1, characterized in that the residence time of the reduced iron in the zone between the level of the annular collector and the bottom part of the furnace is set within 1-4 hours, preferably 3 hours.
    [2]
    3. Method according to paragraphs. 1 and 2, that is, in that the reducing gas from the melting gasifier, after being mixed with the cooling gas, is fed through a cyclone at the level of the annular collector.
    [3]
    4. Method according to paragraphs. 1-3, about tl and h and - ip i and with the fact that to iron ore
    [4]
    -
    0
    five
    0
    five
    0
    35
    40
    mix limestone and / or dolit.
    3. The method according to paragraphs. 1-4, characterized in that the dynamic resistance of the reducing gas supplied at the level of the annular conduit corresponds to a pressure drop of 10-100 mbar.
    6, An apparatus for producing sponge iron or liquid iron from iron ore, containing a shaft furnace with a melter gasifier located below, which is connected to the furnace bottom with one pipe and the gas manifold from the annular collector through a cyclone, a cooling gas collector connected With gas supply pipelines to the shaft furnace, characterized in that, in order to increase the carbon content in the sponge iron or liquid iron, the shaft furnace below the level of the annular collector is made large cross-section,
    7 .. The apparatus according to claim 6, of t-l, and is often the fact that the ratio of the distance between the upper and lower levels of gas supply to the diameter of the mine in this part is 0.5-1.0.
    8. Device on PP. 6 and 7, concerning the fact that the coal gasifier is installed as a gasifier,
    9. The device according to paragraphs. 6-8, characterized in that the reducing gas supply line
    from the melting gasifier at the level of the annular collector, in front of the cyclone, it is connected to the pipeline supplying the cooling gas.
    Jl
    . /ABOUT
    1500 s
    V
    g Coal
    8 50 s
    five
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    FIG. g
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1503686A3|1989-08-23|Method and apparatus for producing sponge iron or molten iron from iron ore
    US4045214A|1977-08-30|Method for producing steel
    CA1050765A|1979-03-20|Method for making steel
    CA1323198C|1993-10-19|Process of reducing fine-grained iron-containing material by means of solid carbonaceous reducing agents
    SU1528324A3|1989-12-07|Method of obtaining cast iron in horizontal reactor
    US4588437A|1986-05-13|Method for producing molten pig iron or steel pre-products in a melt-down gasifier
    SU1313354A3|1987-05-23|Method for reducing disperse iron ore to iron sponge with subsequent remelting to cast iron and device for effecting same
    US4359212A|1982-11-16|Apparatus for reducing finely divided iron oxide material
    US5618032A|1997-04-08|Shaft furnace for production of iron carbide
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    US2833643A|1958-05-06|Apparatus for and method of reducing ore
    CN86106723A|1987-04-01|Produce the method and apparatus of molten iron with coal
    KR930007308B1|1993-08-05|Process for the production of liquid steel or pre-pig iron
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    SU1711677A3|1992-02-07|Method and apparatus for production melted pig iron or intermediately product for steel making
    CA2408720A1|2002-11-12|Method and device for producing pig iron or liquid steel pre-products from charge materials containing iron ore
    US4670049A|1987-06-02|Oxygen blast furnace for direct steel making
    CN103608089B|2016-03-23|To the device that the process gas be used in the equipment of the metallic ore manufacturing direct-reduction regulates
    CN1223693A|1999-07-21|Method of producing liquid pig iron or liquid steel precursors
    US3038795A|1962-06-12|Process for smelting and reducing powdered or finely divided ores
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    同族专利:
    公开号 | 公开日
    AT48651T|1989-12-15|
    ZA857594B|1986-10-29|
    CN1004282B|1989-05-24|
    AU4821485A|1986-04-17|
    KR900004155B1|1990-06-18|
    JPS6191308A|1986-05-09|
    KR860003350A|1986-05-23|
    DE3437913A1|1986-04-24|
    US4958808A|1990-09-25|
    EP0179734A2|1986-04-30|
    EP0179734A3|1986-12-30|
    EP0179734B1|1989-12-13|
    CN85108059A|1986-05-10|
    DE3437913C2|1987-05-07|
    DD246319A5|1987-06-03|
    AU562850B2|1987-06-18|
    BR8505068A|1986-07-29|
    US4854967A|1989-08-08|
    CA1278430C|1991-01-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    GB1100919A|1964-05-06|1968-01-24|Enn Vallak|Method of and means for cooling a combustion chamber, or a reaction chamber used in smelting reduction processes|
    US3776533A|1970-01-28|1973-12-04|Dravo Corp|Apparatus for continuous heat processing of ore pellets|
    US4054444A|1975-09-22|1977-10-18|Midrex Corporation|Method for controlling the carbon content of directly reduced iron|
    JPS5435813A|1977-08-25|1979-03-16|Kobe Steel Ltd|Controlling method for carbon content of reduced pellets|
    JPS5847449B2|1978-04-10|1983-10-22|Kobe Steel Ltd|
    JPS5711366B2|1979-03-20|1982-03-04|
    US4248626A|1979-07-16|1981-02-03|Midrex Corporation|Method for producing molten iron from iron oxide with coal and oxygen|
    US4224057A|1979-08-20|1980-09-23|Hylsa, S.A.|Method for carburizing 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|
    US4584016A|1982-03-23|1986-04-22|Hylsa, S.A.|Method for controlling metallization and carburization in the reduction of metal ores to sponge iron|
    DE3244744A1|1982-11-25|1984-05-30|Klöckner-Werke AG, 4100 Duisburg|Process for the direct reduction of iron ore in a shaft furnace|
    DE3503493C2|1985-01-31|1987-10-22|Korf Engineering Gmbh, 4000 Duesseldorf, De|DE3438487C2|1984-10-17|1987-10-15|Korf Engineering Gmbh, 4000 Duesseldorf, De|
    ZA85287B|1985-01-21|1986-09-24|Korf Engineering Gmbh|Process for the production of pig iron|
    DE3503493C2|1985-01-31|1987-10-22|Korf Engineering Gmbh, 4000 Duesseldorf, De|
    JPH0689386B2|1986-03-04|1994-11-09|株式会社神戸製鋼所|Method for reforming and removing dust from smelting reduction furnace gas|
    DE3669535D1|1986-08-12|1990-04-19|Voest Alpine Ind Anlagen|LODGE PLANT AND METHOD FOR OPERATING SUCH A LODGE PLANT.|
    DE3677513D1|1986-08-12|1991-03-14|Voest Alpine Ind Anlagen|LODGE PLANT AND METHOD FOR OPERATING SUCH A LODGE PLANT.|
    DE3629589C2|1986-08-30|1992-04-02|Mannesmann Ag, 4000 Duesseldorf, De|
    DE3841835C1|1988-07-08|1989-11-02|Klimanek Gmbh, 6680 Wiebelskirchen, De|Process for the manufacture of re-usable products from metallic sludges containing large amounts of adhering oil or other impurities|
    US5114122A|1989-03-08|1992-05-19|Hnat James G|Apparatus for heat processing glass batch materials|
    US5320676A|1992-10-06|1994-06-14|Bechtel Group, Inc.|Low slag iron making process with injecting coolant|
    US5397376A|1992-10-06|1995-03-14|Bechtel Group, Inc.|Method of providing fuel for an iron making process|
    US6197088B1|1992-10-06|2001-03-06|Bechtel Group, Inc.|Producing liquid iron having a low sulfur content|
    US5354356A|1992-10-06|1994-10-11|Bechtel Group Inc.|Method of providing fuel for an iron making process|
    AT402506B|1993-01-26|1997-06-25|Holderbank Financ Glarus|METHOD FOR THE PRODUCTION OF RAW IRON AND CEMENT CLINKER|
    GB2281311B|1993-03-29|1996-09-04|Boc Group Plc|Metallurgical processes and apparatus|
    US5958107A|1993-12-15|1999-09-28|Bechtel Croup, Inc.|Shift conversion for the preparation of reducing gas|
    AT403926B|1996-07-10|1998-06-25|Voest Alpine Ind Anlagen|METHOD FOR GENERATING A REDUCING GAS FOR THE REDUCTION OF METAL ORE, AND SYSTEM FOR IMPLEMENTING THE METHOD|
    AT403929B|1996-07-10|1998-06-25|Voest Alpine Ind Anlagen|METHOD FOR GENERATING A REDUCING GAS FOR THE REDUCTION OF METAL ORE, AND SYSTEM FOR IMPLEMENTING THE METHOD|
    AUPO122796A0|1996-07-25|1996-08-15|McLaughlin, Darren Neville|Mac's mini spit|
    AT406382B|1996-11-06|2000-04-25|Voest Alpine Ind Anlagen|METHOD FOR THE PRODUCTION OF IRON SPONGE BY DIRECTLY REDUCTION OF MATERIAL CONTAINING IRON OXIDE|
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    US20050151307A1|2003-09-30|2005-07-14|Ricardo Viramontes-Brown|Method and apparatus for producing molten iron|
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    US10316376B2|2015-06-24|2019-06-11|Midrex Technologies, Inc.|Methods and systems for increasing the carbon content of sponge iron in a reduction furnace|
    US10508314B2|2015-06-24|2019-12-17|Midrex Technologies, Inc.|Methods and systems for increasing the carbon content of sponge iron in a reduction furnace|
    CN106854702B|2015-12-09|2019-03-15|中国科学院过程工程研究所|The method of iron, vanadium and titanium in one step conversion separation sefstromite concentrate|
    CN107619941A|2017-10-30|2018-01-23|攀钢集团攀枝花钢铁研究院有限公司|The method that vanadium and chromium are separated from vanadium chromium slag|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE3437913A|DE3437913C2|1984-10-12|1984-10-12|
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