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1. 发明专利

JP2002285225A RECYCLE TREATMENT METHOD FOR SPENT CAR OR SPENT ELECTRIC HOME APPLIANCES 失效
公开(公告)号：JP2002285225A
公开(公告)日：2002-10-03
申请号：JP2001084354
申请日：2001-03-23
申请人： NIPPON KOKAN KK
发明人： MIZUKAMI HIDEAKI , IWASAKI KATSUHIRO , MAKI TOSHIMICHI
IPC分类号： B09B3/00 , C21C5/28 , C21C5/52 , C22B7/00 , F27D13/00
摘要： PROBLEM TO BE SOLVED: To apply recycle treatment to spent cars and spent electric home appliances generated in large quantities as an iron source without treating them with a shredder. SOLUTION: When a waste car scrap or a waste car pressed scrap or a waste electric home appliance scraps obtained from the spent car or the spent electric home appliances without treating them with the shredder, is melted as a melting raw material 16 in a melting chamber 2 having a heating source 19, gasifiable component in the melting raw material is gasified by preheating the melting raw material and thereafter, the melting raw material is charged into the melting chamber and melted. In this time, it is desirable to gasify in a preheating chamber 3 directly connected with the melting chamber and to use by mixing the produced molten metal 17 with molten iron in a blast furnace.

2. 发明专利

JP2002168417A FACILITIES AND METHOD FOR TREATING WASTE 失效
公开(公告)号：JP2002168417A
公开(公告)日：2002-06-14
申请号：JP2001037462
申请日：2001-02-14
申请人： NIPPON KOKAN KK
发明人： MIZUKAMI HIDEAKI , NAKAMURA SUNAO , MAKI TOSHIMICHI , NAKAYAMA TAKESHI
IPC分类号： F23G5/00 , B09B3/00 , C21C5/52 , C22B7/00 , F23G5/16 , F23G5/44 , F23J15/00 , F23J15/06 , F27B3/08 , F27B3/18 , F27B3/22 , F27D17/00 , H05B7/18
摘要： PROBLEM TO BE SOLVED: To provide the facilities and method for treating waste that can treat the waste without using a large amount of raw materials such as oxygen and coke and with simple facilities. SOLUTION: Facilities having a melting chamber 1 and a spare chamber 2 that is directly connected to the upper portion of the melting chamber 1 are used, a melt 8 is formed in the melting chamber 1 and at the same time the melt 8 is heated by arc 7 that is generated by an arc electrode 6, the waste 3 is continuously or discontinuously loaded into the spare chamber 2, the waste 3 is thermally decomposed or burned until it reaches the chamber 1, the combustible content is gasified and at the same time a metal constituent out of the incombustible contents is melted by the melt 8 in the chamber 1, and the other constituents are formed into slag by the melt 8 in the chamber 1.

3. 发明专利

JP2001172714A MELTING CHAMBER IN ARC-MELTING EQUIPMENT 失效
公开(公告)号：JP2001172714A
公开(公告)日：2001-06-26
申请号：JP35388799
申请日：1999-12-14
申请人： NIPPON KOKAN KK
发明人： WAKAHARA KEIJI , MAKI TOSHIMICHI , KUBO HIROTSUGU , SATO YASUHIRO , MIZUKAMI HIDEAKI
IPC分类号： C22B9/16 , C21B13/12 , C21C5/52 , F27B3/08 , F27D13/00
摘要： PROBLEM TO BE SOLVED: To provide a melting chamber which can stably be used without aggaravating the unit requirement of refractory even in a long term operation, in the arc-melting equipment provided with the melting chamber, in which a molten metal holding part is formed as a projecting inner surface shape toward the inside thereof. SOLUTION: In the melting chamber 2 of the arc-melting equipment, in which the outer wall of the melting furnace 2 is surrounded with an iron shell and in the inside of the iron shell, a refractory is applied as the holding part of the metal to be melted, and a part of this holding part is formed as the projecting shape toward the inside, the whole iron shell 15 of the outer wall is formed as the projecting shape or the flat plate shape toward the outside of the melting chamber and in the inside of this iron shell, the refractory bricks 16 are lined on the iron shell with tight sticking. In the projecting portion toward the inside of the holding part, monolithic refractory 17 closely stuck with the inner surface of the refractory brick, is applied.

4. 发明专利

JPH11344288A METHOD FOR MELTING COLD IRON SOURCE IN ARC FURNACE AND ARC FURNACE 失效
公开(公告)号：JPH11344288A
公开(公告)日：1999-12-14
申请号：JP15253598
申请日：1998-06-02
申请人： NIPPON KOKAN KK
发明人： MIZUKAMI HIDEAKI , MAKI TOSHIMICHI
IPC分类号： C21C5/52 , F27B3/16
摘要： PROBLEM TO BE SOLVED: To effectively melt a cold iron source charged in a peripheral part in an arc furnace by installing accessibly thereto a plurality of pushers in a peripheral direction by causing the pushers to penetrate the side wall of the furnace and moving an unmolten cold iron source in the peripheral part in the furnace to the central part by allowing the pushers to access to and from the furnace during a melting work. SOLUTION: After a furnace cover 4 is opened, a cold iron source 11 is charged in an arc furnace 1, the furnace cover 4 is closed, and a top electrode 6 is inserted into the furnace, by generating an arc 14 by supplying direct current between a furnace bottom electrode 5 and the top electrode 6, the cold iron source 11 is molten to form a molten steel 12. Required flux is charged into the furnace to form molten slag 13 on the molten steel 12 for oxidation prevention and heat insulation of the molten steel 12. In this case, when a space is caused to be formed in the periphery of the top electrode 6 after the molten steel 12 is formed, a pusher 7 installed accessibly to the furnace inside is caused to enter the inside of the furnace by penetrating a furnace side wall 3, so that the cold iron source 11 of the periphery of the furnace inside is caused to move to the central part thereof for effectively melting the cold iron source.

5. 发明专利

JPH11156328A TREATMENT OF ZINC-CONTAINING DUST AND ZINC-CONTAINING DUST PELLET 失效
公开(公告)号：JPH11156328A
公开(公告)日：1999-06-15
申请号：JP33477897
申请日：1997-11-20
申请人： NIPPON KOKAN KK
发明人： ISOZAKI SHINICHI , FUJISAWA YOSHINARI , MAKI TOSHIMICHI
IPC分类号： B01D53/64 , B01D53/06 , B09B3/00 , F27D17/00
摘要： PROBLEM TO BE SOLVED: To finally recover dust high in zinc content by producing a dust pellet from the zinc-containing dust contained in the exhaust gas of an electric furnace or the exhaust gas of the scrap iron preheating apparatus arranged on the way of the exhaust gas treatment system of the electric furnace. SOLUTION: Zinc-containing dust is treated by a method wherein an adsorbing material containing a carbon material is blown into the exhaust gas of an electric furnace for melting and refining scrap iron or the exhaust gas of a scrap iron preheating apparatus for preheating scrap iron by the exhaust gas of the electric furnace in the front stage of a dust collector and a carbon material with a particle size of 5 mm or less is added to the dust collected by the dust collector to agglomerate the dust to form pellets with a carbon content of 6-40 wt.% and these pellets are charged in the electric furnace during the period from the terminal stage of the scrap iron melting period of the electric furnace to the front stage of the refining period thereof to be melted and refined along with scrap iron.

6. 发明专利

JPH10310813A METHOD FOR MELTING COLD IRON SOURCE AND MELTING EQUIPMENT THEREOF 失效
公开(公告)号：JPH10310813A
公开(公告)日：1998-11-24
申请号：JP7861898
申请日：1998-03-12
申请人： NIPPON KOKAN KK
发明人： MIZUKAMI HIDEAKI , MAKI TOSHIMICHI , SATO YASUHIRO , NAKAYAMA TAKESHI
IPC分类号： C21C5/52 , F27B3/08 , F27D13/00 , F27D17/00
摘要： PROBLEM TO BE SOLVED: To provide a melting method of cold iron source which of viates necessity of a device for carrying and supplying the cold iron source into a melting chamber and can preheat the cold iron source in the following charge and can melt the cold iron source with such an extremely high efficiency as not be obtained in the conven tional melting equipment and can prevent the development of harmful component without needing a large scaled equipment, and a melting equipment thereof. SOLUTION: In melting the cold iron source by using a melting furnace 1 and an arc-melting equipment having a preheating shaft 2 directly connected with the upper part of the melting furnace, the cold iron source 3 in the melting furnace 1 is melt with the arc 7 while supplying the cold iron source 3 into the preheating shaft 2. Oxygen-containing gas is supplied into the cold iron source charging part from gas introducing holes 16 formed into plural steps to burn unburning gas produced from the melting furnace 1. The oxygen-containing gas quantity and the positions of the gas introducing holes 16 are adjusted so that the temp. at near the outlet of exhaust gas in the preheating shaft becomes a prescribed temp. or higher and thereafter, the exhaust gas is quickly cooled at a cooling part 21 connected with the upper part of the preheating shaft 2.

7. 发明专利

JP2641914B2 失效
公开(公告)号：JP2641914B2
公开(公告)日：1997-08-20
申请号：JP21173988
申请日：1988-08-26
申请人： NIPPON KOKAN KK , FUJI DENKI KK
发明人： SHIMIZU HIROSHI , MAKI TOSHIMICHI , TAKAHASHI SHOICHI , AO NORIO , TSURUTA MASAMI
IPC分类号： H05B7/148 , F27D11/08

8. 发明专利

JP2641913B2 失效
公开(公告)号：JP2641913B2
公开(公告)日：1997-08-20
申请号：JP20580288
申请日：1988-08-19
申请人： NIPPON KOKAN KK , FUJI DENKI KK
发明人： AO NORIO , SHIMIZU HIROSHI , TAKAHASHI SHOICHI , MAKI TOSHIMICHI , OKAZAKI KINZO
IPC分类号： H05B7/148 , F27D11/08

9. 发明专利

JPH0379990A DC ELECTRIC FURNACE AND BOTTOM ELECTRODE THEREOF 失效
公开(公告)号：JPH0379990A
公开(公告)日：1991-04-04
申请号：JP21303589
申请日：1989-08-21
申请人： NIPPON KOKAN KK , TOKYO STEEL MFG , ASAHI GLASS CO LTD
发明人： YAMASHITA HIROYUKI , NISHIMOTO RIICHI , KUTSUKAKE YUKINORI , YUKINAWA TSUGIO , MAKI TOSHIMICHI
IPC分类号： F27D11/02
摘要： PURPOSE:To extend the life of the bottom electrode of a DC electric furnace by providing a plurality of conductive contact pins to be heated by conducting the electrode in contact with a material to be heated at one end exposed in the furnace, and a stamp having properties of zirconium boride for surrounding a part continuing from the exposed ends of the pin. CONSTITUTION:Bottom electrode 10 is engaged with the center of the bottom of a DC electric furnace, contact pins 11 are mounted to be supported to a current collector plate 13, and erected through a board 12. Stamp materials 17a, 17b are filled in a case 18, and most of the pins 11 are covered with the materials 17a, 17b. The materials 17a, 17b are divided into two layers, the material 17a of the lower layer is formed by mixing magnesia powder with binder to be tamped, and the material 17b of the upper layer is formed by mixing zirconium boride powder with binder to be tamped. The zirconium boride used for the material 17b desirably contains 90wt.% or more of ZrB2 in purity. If the purity of the boride is low, slug erosion resistance is deteriorat ed.

10. 发明专利

JPS6231269B2 失效
公开(公告)号：JPS6231269B2
公开(公告)日：1987-07-07
申请号：JP524283
申请日：1983-01-18
申请人： NIPPON KOKAN KK , TOSHIN SEIKO KK
发明人： MAKI TOSHIMICHI , OOTANI TAKESHI , IGUCHI MITSUYA , IWAMARU SUMYOSHI , WATANABE TAKASHI
IPC分类号： F27D13/00 , F27B3/26 , F27D17/00

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