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101. 发明专利

JPH02209409A SMELTING REDUCTION IRON-MAKING METHOD 失效
公开(公告)号：JPH02209409A
公开(公告)日：1990-08-20
申请号：JP2855489
申请日：1989-02-09
申请人： NIPPON KOKAN KK
发明人： KITANO YOSHIYUKI , ARAKAWA SAKAE , TSUBOI HARUTO , ISOZAKI SHINICHI , IWASAKI TOSHIHIKO
IPC分类号： C21B11/00 , C21B13/00
摘要： PURPOSE:To efficiently execute smelting reduction iron-making provided with a pre- reduction furnace by alternately executing slag tapping and iron tapping in plural smelting reduction furnaces, continuously operating the smelting reduction and preventing lowering of supplying gas into a pre-reduction furnace. CONSTITUTION:Generating gas of the smelting reduction furnace 2A is supplied into the pre-reduction furnace 1. The pre-reduction is executed to powdery ore charged in this pre-reduction furnace 1 as fluidized bed 5 with the above generated gas. In the obtd. pre-reduction ore, the coarse grain is charged through an ore discharging tube 6 and the fine grain is charged through a dust collector 4 with carrier gas, into the smelting reduction furnace 2A, respectively, and the smelting reduction is executed to obtain molten iron. In the above pre-reduction-smelting reduction iron-making method, to one set of the pre-reduction furnace 1, two or more sets of smelting reduction furnaces 2A, 2B for supplying the generating gas into the above furnace 1, are arranged. The slag tapping and iron tapping are alternately executed from the furnaces 2A, 2B so as to execute the continuous operation of the smelting reduction. By this method, the continuous supply of the raw material from the pre-reduction furnace 1 can be executed, and the miniaturization thereof can be realized and fluidization of the fluidized bed 5 can be maintained under good condition.

102. 发明专利

JPH02175809A SMELTING REDUCTION IRON-MAKING METHOD 失效
公开(公告)号：JPH02175809A
公开(公告)日：1990-07-09
申请号：JP32936288
申请日：1988-12-28
申请人： NIPPON KOKAN KK
发明人： ARIYAMA TATSURO , ISOZAKI SHINICHI
IPC分类号： C21B11/00 , C21B13/00
摘要： PURPOSE:To enable charge of raw material without using injection, etc., and to stably and economically execute the operation by utilizing reducing waste gas in the system, executing coarsening, etc., fine powdery iron ore contained in the raw material and charging this into the smelting reduction furnace. CONSTITUTION:The fine powdery iron ore scattered together with waste gas from a fluidized type pre-reduction furnace 1 for pre-reducing the iron ore is recovered with a dust collector 3. This recovered fine powdery iron ore is charged into a fluidized bed type agglomerating furnace 2, and waste gas of the above reduction furnace 1 and/or generating gas of the smelting reduction furnace 4 and O2 are blown into the fluidized bed 8 to form combustion zone 9. Then, the ore 11 agglomerating and growing the fine powdery iron ore to the suitable grain size is supplied into the smelting reduction furnace 4.

103. 发明专利

JPH02175808A SMELTING REDUCTION IRON-MAKING EQUIPMENT 失效
公开(公告)号：JPH02175808A
公开(公告)日：1990-07-09
申请号：JP32936188
申请日：1988-12-28
申请人： NIPPON KOKAN KK
发明人： ARIYAMA TATSURO , ISOZAKI SHINICHI
IPC分类号： C21B11/00 , C21B13/00
摘要： PURPOSE:To effectively utilize excess energy in the system and to reduce unit consumption of coal by using a parallel flow type rotary drying machine to prevent over-heat, etc., of the coal developing in the case of using a counter flow type and executing suitable drying and preheating without developing sintering, etc. CONSTITUTION:This smelting reduction iron-making equipment is formed with a smelting reduction furnace 1, fluidized bed type pre-reduction furnace 2, to which the gas generated in the furnace 1 is supplied, the parallel flow type rotary drying machine 3, a system 4 for supplying the coal to the drying machine, waste gas supplying system 5 and a system 6 for supplying dried and preheated coal discharged from the above drying machine 3 into the above smelting reduction furnace 1. The above drying machine 3 drys and preheats the coal 4 as the carbonaceous material. Further, in the above waste gas supplying system 5, after removing dust in the waste gas generated from the pre- reduction furnace 2, this is supplied to the drying machine 3.

104. 发明专利

JPH0230611A METHOD AND DEVICE FOR PRODUCING POLYCRYSTALLINE SILICON 失效
公开(公告)号：JPH0230611A
公开(公告)日：1990-02-01
申请号：JP18020188
申请日：1988-07-21
申请人： NIPPON KOKAN KK
发明人： ARIYAMA TATSURO , ISOZAKI SHINICHI
IPC分类号： C01B33/03
摘要： PURPOSE:To prevent the deposition of silicon on the inside surface of a reactor by supplying and decomposing a silicon-containing gas under conditions that silicon particles are heated and circulated with flowing in the reactor. CONSTITUTION:An inner cylinder 4, a ling 6 having a diameter smaller than the inner cylinder 4 (on a bottom plate 3), a dispersing plate 7 and a circular gas nozzle 8 for driving the particles are disposed in a reactor 2. Mixed gases of a silicon-containing gas and hydrogen gas are introduced into the inner cylinder 4 through the dispersing plate 7 to fluidize silicon particles in the inner cylinder 4 and the silicon particles raised together with the gases are heated from the outside of the reactor 2 with a heat-supplying device 15 while being sunk in the circular portion 14 of a double cylinder. The sunk heated silicon particles are moved and fluidized in the cylinder with a gas 11 sent by a driving gas nozzle 8 disposed in the bottom plate 3 in a circular state. Heat is supplied to the fluidized layer with the sensible heat of the silicon particles and the silicon particles are brought into contact with the send silicon-containing gas 10 to subject the silicon-containing gas to a pyrolysis or reduction reaction, thereby allowing the silicon to deposit and grow on the surfaces of the silicon particles.

105. 发明专利

JP2002060860A APPARATUS FOR RECOVERING ZINC OXIDE FROM IRON-MAKING DUST 失效
公开(公告)号：JP2002060860A
公开(公告)日：2002-02-28
申请号：JP2000242031
申请日：2000-08-10
申请人： NIPPON KOKAN KK
发明人： ISOZAKI SHINICHI , WATABE MASAYUKI
IPC分类号： C01G9/02 , C22B7/00 , C22B7/02 , C22B19/30 , C22B19/36
摘要： PROBLEM TO BE SOLVED: To provide an apparatus for efficiently recovering a volatile matter containing high concentration of zinc oxide at a low cost, by which a large quantity of iron-making dust can be treated when the zinc oxide is recovered from the iron-making dust. SOLUTION: The recovering apparatus 1 for zinc oxide from the iron-making dust, is provided with a melting furnace 2, in which the agglomerated iron- making dust 3 is charged and molten iron 7 for heating and reducing iron oxide and the zinc oxide in the iron-making dust is held, and recovering means 22, 23, 24 for recovering the reduced and vaporized zinc as the zinc oxide. The melting furnace is provided with a heating means 17 for plasma-heating and a stirring means 20 for stirring the molten iron, and further, the recovering means are provided with plural dust collectors 23, 24 for collecting the dust step by step from the dust having larger grain diameter.

106. 发明专利

JP2001190918A DUST COLLECTOR FOR EXHAUST GAS 失效
公开(公告)号：JP2001190918A
公开(公告)日：2001-07-17
申请号：JP2000335334
申请日：2000-11-02
申请人： NIPPON KOKAN KK
发明人： ISOZAKI SHINICHI , FURUKAWA TAKESHI
IPC分类号： F23J15/00 , B01D46/32 , F27D17/00
摘要： PROBLEM TO BE SOLVED: To obtain an efficient dust collector for exhaust gas reduced in the supply quantity of solid particles. SOLUTION: In the dust collector wherein a filter bed 3 comprising solid particles to be filter media is arranged in an exhaust gas flow channel 1 to remove dust in exhaust gas, solid particles 10 present on the upstream side to the flow of exhaust gas are appropriately discharged.

107. 发明专利

JP2001011516A OPERATION OF SMELTING REDUCTION FURNACE 失效
公开(公告)号：JP2001011516A
公开(公告)日：2001-01-16
申请号：JP18217799
申请日：1999-06-28
申请人： NIPPON KOKAN KK
发明人： IWASAKI KATSUHIRO , ISOZAKI SHINICHI , KAWAKAMI MASAHIRO , SAWADA TERUTOSHI , SEKIGUCHI TAKESHI , WATABE MASAYUKI
IPC分类号： C21B11/02
摘要： PROBLEM TO BE SOLVED: To provide an operating method of a smelting reduction furnace, by which, in the case of charging a large block of solid metallic raw material into the smelting reduction furnace, the operation can stably be executed without bringing about any trouble to molten metal tapping work caused by clogging of a non-melting material in the molten metal tapping hole. SOLUTION: In the operationing method of the smelting reduction furnace, with which the continuous smelting reduction operation is executed by suitable charging of the bulky solid metallic source and are to intermittently execute the molten metal tapping work through the molten metal tapping hole, during tapping the molten metal and just before tapping the molten metal, the charge of the bulky solid metallic source is interrupted. Further, when the bulky solid metallic source is charged, after charging the bulky solid metallic source, the max. length of the non-melting part of the bulky solid metallic source at the molten metal tapping time is made to

108. 发明专利

JP2001011515A MELT-REDUCTION SMELTING METHOD OF METALLIC ORE AND APPARATUS THEREFOR 失效
公开(公告)号：JP2001011515A
公开(公告)日：2001-01-16
申请号：JP17920899
申请日：1999-06-25
申请人： NIPPON KOKAN KK
发明人： IWASAKI KATSUHIRO , ISOZAKI SHINICHI , KAWAKAMI MASAHIRO , YAMANAKA MITSUHIRO , SEKIGUCHI TAKESHI , WATABE MASAYUKI
IPC分类号： C22B5/10 , C21B11/00 , C21C5/28 , F27B17/00 , F27D3/16
摘要： PROBLEM TO BE SOLVED: To improve the service life of a stirring nozzle by blowing gas for stirring into molten metal produced in a melt-reduction smelting from the side part near the furnace bottom part of the molten metal. SOLUTION: Plural pieces of furnace bottom nozzles 11 are arranged at the bottom part of a smelting furnace 1, and plural pieces of side nozzles 12 are arranged at the side wall part near the bottom part, and the gas 13 for stirring is blown into the molten metal 2 from these nozzles to stir the molten metal 2 and molten slag 3 under a specific condition. The blowing of the gas 13 for stirring can independently be controlled to at least the blowing from the furnace bottom nozzles 11 and the blowing from the side nozzles 12. The fitting position of the side nozzles 12 is better when nearer to the furnace bottom part as possible, and in this way, the necessary stirring motive force of the molten metal 2 to maintain the mixed stirring of the molten metal 2, the reducing rate of iron oxide and the heat transmission of secondary combustion heat into the molten metal 2 from the molten slag 3, becomes easily obtainable. Therefore, the gas flow rate for blowing into the nozzle can be reduced and the wearing of nozzle bricks is restrained.

109. 发明专利

JP2001011514A SMELTING REDUCTION METHOD OF METALLIC ORE SUITABLE FOR MASS-PRODUCTION AND APPARATUS THEREFOR 失效
公开(公告)号：JP2001011514A
公开(公告)日：2001-01-16
申请号：JP17921099
申请日：1999-06-25
申请人： NIPPON KOKAN KK
发明人： IWASAKI KATSUHIRO , ISOZAKI SHINICHI , KAWAKAMI MASAHIRO , YAMANAKA MITSUHIRO , SEKIGUCHI TAKESHI , WATABE MASAYUKI
IPC分类号： C21B11/00
摘要： PROBLEM TO BE SOLVED: To apply a lance for blowing oxygen and a suitable condition of this nozzle for achieving high secondary combustion and high heat conducting efficiency when metallic ore is mass-produced in a large-scale smelting reduction furnace. SOLUTION: In the case the horizontal cross-sectional area (a) in molten slag part is 10 m2 to =30 m2 or in the case the A is >=40 m2, plural pieces of the multi-hole nozzles are used. The total number (ntotal) of the nozzles are made to (a) 60 m2, the number of the lances are made to 0.6

110. 发明专利

JP2000328133A METHOD FOR CHARGING GRANULE INTO FURNACE 失效
公开(公告)号：JP2000328133A
公开(公告)日：2000-11-28
申请号：JP13074799
申请日：1999-05-12
申请人： NIPPON KOKAN KK
发明人： TAGUCHI NORIHIKO , WATABE MASAYUKI , YAMANAKA MITSUHIRO , ARAKAWA SAKAE , ISOZAKI SHINICHI
IPC分类号： C22B7/02 , C21B11/02 , C21C5/38 , C21C5/46 , C21C7/00 , C21C7/04 , F27D3/18
摘要： PROBLEM TO BE SOLVED: To charge granule into a furnace without executing a special pre- treatment and agglomerating and without causing lowering of thermal efficiency, and the like, in the furnace caused by moisture contained in the granule when the granule containing the moisture is utilized as a raw material in the furnace. SOLUTION: Granular slurry is injected from above molten metal surface in the dispersion state in the furnace 1, and after vaporizing the moisture in the granular slurry with the heat in the furnace, this granular slurry is dropped onto the molten metal surface. Further, desirably, the granular slurry is injected and stuck to the furnace wall in the furnace, and after vaporizing the moisture of the granular slurry with the heat on the wall surface of the furnace, the ganular slurry is dropped out onto the molten steel surface in the furnace.

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