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1. 发明专利

JP2004116980A Induction heated melting furnace 审中-公开
公开(公告)号：JP2004116980A
公开(公告)日：2004-04-15
申请号：JP2002285216
申请日：2002-09-30
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： NISHIHARA NOBUYOSHI , NISHIYAMA HIDEO
IPC分类号： F27D1/00 , F27D11/06
摘要： PROBLEM TO BE SOLVED: To provide an induction heated melting furnace causing no danger of steam explosion and having a gas seal function.
SOLUTION: An electromagnetic induction heating melting furnace main body is constituted of a refractory material 2 and a metallic furnace shell 3 covering the outside of the refractory material 2. The metallic furnace shell 3 is divided into a plurality of sections in the circumference direction and electrically insulated, and on the outer periphery of the metallic furnace shell 3, a plurality of induction heating coils 4 and U-shaped iron cores 5 are installed. In the opposite part to the metallic furnace at the both end faces of the iron core 5 in the divided parts in the circumference direction of the furnace shell 3, an opening part 6 wider than an area of the end face of the iron core 5 is formed in the metallic furnace shell 3 for passing magnetic flux.
COPYRIGHT: (C)2004,JPO

2. 发明专利

JP2002340311A DISCHARGING DEVICE FOR WASTE MELTING FURNACE 失效
公开(公告)号：JP2002340311A
公开(公告)日：2002-11-27
申请号：JP2001147076
申请日：2001-05-16
申请人： NIPPON STEEL CORP
发明人： NISHIHARA NOBUYOSHI , OSADA SHOICHI
IPC分类号： F23G5/24 , B01J4/00 , B09B3/00 , F23G5/00 , F23J1/00 , F23J1/08 , F27D3/14
摘要： PROBLEM TO BE SOLVED: To provide a discharging device for a waste melting furnace, reduced in the content of heavy metals in the slag thereof and capable of discharging the slag which will not be liquated. SOLUTION: In the discharging passage 3 of molten slag 7 and molten metal 8 for the waste melting furnace 1, one end of the discharging passage 3 is positioned in the well of the melting furnace 1, while the other end of the same is positioned so as to be higher than the surface of the well and is slanted so as to be faced to the outside of the furnace.

3. 发明专利

JP2002053914A METHOD AND APPARATUS FOR TREATING MOLTEN SLAG OF WASTE MATERIAL 失效
公开(公告)号：JP2002053914A
公开(公告)日：2002-02-19
申请号：JP2000235213
申请日：2000-08-03
申请人： NIPPON STEEL CORP
发明人： NISHIHARA NOBUYOSHI , OSANO HIDEMI
IPC分类号： F23J1/08 , B09B3/00 , C04B5/06 , C22B7/02 , C22B9/05 , C22B9/22 , C22B11/02 , C22B15/00 , C22B23/02 , F27D11/12 , F27D15/00
摘要： PROBLEM TO BE SOLVED: To provide a method and an equipment for producing a slag to be advantageously reused by improving the characteristics and the economical values of the slag and metal. SOLUTION: The method and the apparatus for treating the molten slag of the waste is characterized in that, in after melting a waste and/or an incineration ash of the waste, the molten material is irradiated with microwave for keeping the slag and the metal in the molten state and also, gas containing oxygen is blown into the slag and the metal, and then, the iron in the metal is oxidized and caught into molten slag and thus, non-ferrous metal in the metal is concentrated and this metal is recovered as raw material for the non-ferrous metal.

4. 发明专利

JP2002048321A MELTING PROCESSING METHOD FOR WASTE 失效
公开(公告)号：JP2002048321A
公开(公告)日：2002-02-15
申请号：JP2000235212
申请日：2000-08-03
申请人： NIPPON STEEL CORP
发明人： NISHIHARA NOBUYOSHI , OSANO HIDEMI
IPC分类号： F23G5/24 , B09B3/00
摘要： PROBLEM TO BE SOLVED: To reduce the amount of consumption of oxygen or eliminate the need of oxygen added to air fed from cokes and a tuyere in a melting furnace where waste is directly melted by making use of electricity to heat cokes and slug with microwaves. SOLUTION: In a waste direct melting furnace of the type of a shaft furnace system where tuyeres of 1 stage or a plurality of stages are disposed, cokes and slag deposited at a lower portion in the furnace are heated with a microwave irradiation apparatus disposed at a lower portion in the shaft furnace, and simultaneously cokes is combusted with air blown from the blade on the lowest stage. to melt thermal decomposition residues in waste.

5. 发明专利

JP2002013723A METHOD AND APPARATUS FOR TREATMENT OF WASTE MOLTEN- SLAG 失效
公开(公告)号：JP2002013723A
公开(公告)日：2002-01-18
申请号：JP2001034755
申请日：2001-02-13
申请人： NIPPON STEEL CORP
发明人： NISHIHARA NOBUYOSHI , OSANO HIDEMI , KATOU YASUHIKO
IPC分类号： F23J1/08 , B09B3/00 , C02F11/06 , C02F11/10 , C22B7/00 , C22B7/04 , C22B11/02 , C22B15/14 , F23G5/16 , F23G5/24 , F23J1/00 , F27B3/19 , F27B3/22 , F27D3/16
摘要： PROBLEM TO BE SOLVED: To provide a method and apparatus for treatment of waste molten slag in which properties and economical value of slag and metals are increased to reuse them advantageously. SOLUTION: Waste and/or waste incineration ash is melted and iron in the molten state is oxidized by blowing gas containing oxygen into the slag and metals to take iron into the molten slag. Thus, nonferrous metals in the metal are concentrated, and the metal is recovered as a nonferrous metal material.

6. 发明专利

JP2001330224A METHOD FOR MELTING TREATMENT OF WASTE 失效
公开(公告)号：JP2001330224A
公开(公告)日：2001-11-30
申请号：JP2000232025
申请日：2000-07-31
申请人： NIPPON STEEL CORP
发明人： OSANO HIDEMI , NISHIHARA NOBUYOSHI
IPC分类号： F23G5/24 , F23J1/00
摘要： PROBLEM TO BE SOLVED: To provide a waste melting furnace which dispenses with auxiliary fuels, such as coke, by directly melting the wastes without incineration. SOLUTION: The wastes inserted into the furnace are subjected to preheating, drying and thermal decomposition by air or oxygen enriched air which has been blown to the lower part of the furnace to obtain thermal decomposition residue. Meanwhile, melt, which has been collected in advance in a collecting portion formed in the furnace floor, is subjected to induction heating, and with the resultant heat from the melt, the thermal decomposition residue is subjected to melting treatment. Thus no such expensive expendable as a graphite electrode is required. Also, no fuel is required because heat resulted from burning the wastes can be converted to electric energy so as to be used as an induction heating power source, thereby remarkably reducing the treating costs. Further, as heating temperature can be readily controlled by changing applied electric power, slag of stable quality can be produced.

7. 发明专利

JPH05340520A 失效
公开(公告)号：JPH05340520A
公开(公告)日：1993-12-21
申请号：JP15247592
申请日：1992-06-11
申请人： NIPPON STEEL CORP
发明人： NISHIHARA NOBUYOSHI , MORI KOICHIRO , MORI TOSHITSUGU
IPC分类号： F23G5/00 , F23G5/16 , F23G7/00
摘要： PURPOSE:To restrain the fluctuations in combustible dust, and waste gas flow rate and temperature in a secondary combustion chamber by providing a dust collector, a dust storage tank, a powder discharge device and a dust supply pipe on a pipe leading to the secondary combustion chamber. CONSTITUTION:Waste gas and dust generated from a melting furnace 1 is discharged through a pipe 6 on top of the melting furnace 1. A dust collector 7 is installed on the pipe 6 to collect dust contained in the waste gas. The dust collected is once stored in a storage tank 8, discharged by a discharge device 9 and supplied to a secondary combustion chamber 13 through a dust supply pipe 10. Dust carrier gas is supplied from a carrier gas supply pipe 11. Thereby, the fluctuation in combustible dust dispersing from the melting furnace is restrained.

8. 发明专利

JPS63140020A FLUIDIZED BED REDUCING DEVICE FOR IRON ORE 失效
公开(公告)号：JPS63140020A
公开(公告)日：1988-06-11
申请号：JP28660086
申请日：1986-12-03
申请人： NIPPON STEEL CORP
发明人： EGASHIRA TATSUHIKO , NISHIHARA NOBUYOSHI
IPC分类号： C21B13/00 , C21B13/14 , F27B15/02
摘要： PURPOSE:To accelerate high-speed fluidized reduction reaction and to improve the efficiency of reduction by providing an external particle circulating device to a fluidized bed reduction furnace and providing expanding and reducing parts to the furnace to increase the amt. of the stagnating particles. CONSTITUTION:A cyclone 31 is connected to the upper part of the fluidized bed reduction furnace 6 to capture the fine particles entrained in a reducing gas 11 and thereafter, the gas is returned through a hopper 33 to the furnace 6. The reducing part 30 and the expanding 31 are formed in the height direction of the furnace 6 to introduce the reducing gas 11 into the furnace 6 by which the iron ore particles are fluidized at high speed. The concn. of the particles is improved by the vortexes generated in the expanding part 31 and the decrease in the superficial velocity of the gas at this time. The slip speed of the reducing gas and the particles is increased by the vortexes, by which the reactivity of the iron ore and the reducing gas is improved and the rate of utilizing the reducing gas is enhanced.

9. 发明专利

JPS62228889A PREHEATER IN IRON-ORE SPARE REDUCTION FACILITY 失效
公开(公告)号：JPS62228889A
公开(公告)日：1987-10-07
申请号：JP7157786
申请日：1986-03-28
申请人： NIPPON STEEL CORP
发明人： EGASHIRA TATSUHIKO , NISHIHARA NOBUYOSHI , KUNITOMO KAZUYA
IPC分类号： C21B11/00 , F27D13/00

10. 发明专利

JPS62227013A DEVICE FOR TRANSFERRING PRELIMINARILY REDUCED ORE IN IRON MAKING INSTALLATION BY MELT REDUCTION 失效
公开(公告)号：JPS62227013A
公开(公告)日：1987-10-06
申请号：JP7156786
申请日：1986-03-28
申请人： NIPPON STEEL CORP
发明人： EGASHIRA TATSUHIKO , NISHIHARA NOBUYOSHI , HAYASHI YOICHI
IPC分类号： C21B11/00 , C21B13/00
摘要： PURPOSE:To smoothly transfer preliminarily reduced ore with gas to a melt reduction furnace by a simplified transfer piping line by taking the particles of the preliminarily reduced ore out of the mid-way of a circulation pipeline of a circulation device for particles provided to a fluidized bed preliminary reduction furnace and charging the particles into the melt reduction furnace. CONSTITUTION:Powder ore raw material A is preliminarily reduced with the reducing gas B from the melt reduction furnace 2 for melt reduction of the preliminarily reduced ore in the fluidized bed preliminary reduction furnace 1. The transfer line constituted by disposing a transfer pipe 10 connected to the circulation pipe 4 in the circulation device 3 for the particles of the preliminarily reduced ore consisting of a cyclone 5, hopper 6, circulation pipe 4 and pneumatic feeder 7 provided to the fluidized bed preliminary reduction furnace 1 is disposed as the transfer line for transferring the preliminarily reduced ore from the fluidized bed preliminary reduction furnace 1 to the melt reduction furnace 2 in the above-mentioned melt reduction installation. A pneumatic distributor 12 for branching the flow passage to a plurality is connected to the pipe 10 and the preliminarily reduced ore is preferably charged through plural distribution pipes 14, pneumatic nozzles 19 and blow nozzles 11 into the melt reduction furnace 2 to improve the reactivity of reduction.

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