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1. 发明专利

JPH07233424A TREATMENT FOR USING STEELMAKING DUST AND TURNINGS AS STEELMAKING RAW MATERIAL 失效
公开(公告)号：JPH07233424A
公开(公告)日：1995-09-05
申请号：JP2456194
申请日：1994-02-22
申请人： NIPPON STEEL CORP
发明人： KATAYAMA HIROYUKI , SAKAKIBARA MICHIAKI , KOTANI SEIICHI
IPC分类号： C22B1/00 , C22B7/00 , C22B7/02
摘要： PURPOSE:To perform a pretreatment for stably using dust developed from steelmaking furnace and turnings having oil content as a steelmaking raw material. CONSTITUTION:The steelmaking dust containing iron oxide and the turnings containing the oil content are charged into the inner part of a rotary furnace heated from the outside and heated up to 700 deg.C to =8%. A material formed by mixing waste oil with the dust is heated. Two externally heating type furnaces are used, and in the first furnace, the turnings are heated and reducing gas is produced from the stuck oil content. This gas is supplied to the second furnace used for heating the dust to execute the reduction of the oxide in the dust, and this exhaust gas is completely burnt and used as fuel for externally heating two furnaces.

2. 发明专利

JPH07173547A TREATMENT OF DUST 失效
公开(公告)号：JPH07173547A
公开(公告)日：1995-07-11
申请号：JP34325993
申请日：1993-12-17
申请人： NIPPON STEEL CORP
发明人： SAKAKIBARA MICHIAKI
IPC分类号： C22B7/02
摘要： PURPOSE:To remove zinc oxide from the dust with the low consumption of heat by reducing the iron oxide in the dust with COG at a low temp. and utilizing the reaction heat difference due to the reoxidation and the carbon deposited by the decomposition of the COG. CONSTITUTION:The dust contg. zinc oxide is reduced with hydrogen at 500-700 deg.C in a reactor 2 with COG as a reducing gas and then oxidized with air in another reactor 6. The dust is heated to 1000-1150 deg.C by the oxidation heat, the C deposited from the COG is partially burned to produce CO, which reduces the zinc oxide in the dust, and the zinc oxide is removed. Consequently, the heat consumption is reduced by 20-30% as compared with that of the conventional method, and >=90% of zinc is removed.

3. 发明专利

JPH07118768A TREATMENT OF DUST 失效
公开(公告)号：JPH07118768A
公开(公告)日：1995-05-09
申请号：JP28881393
申请日：1993-10-26
申请人： NIPPON STEEL CORP
发明人： SAKAKIBARA MICHIAKI , KOTANI SEIICHI
IPC分类号： C22B7/02 , F27D17/00
摘要： PURPOSE:To easily separate and recover adhered Zn from dust by reducing the ZnO-contg. dust generated in steel making with a hydrogen-contg. gas to Zn by an external heating rotary kiln, cooling and condensing the vaporized Zn as metallic Zn. CONSTITUTION:The dust generated from a steel making furnace such as an electric furnace consists essentially of iron oxide and farther contains the ZnO etc., harmful as the auxiliary steel making material. Accordingly, the dust 1 is passed through a drier 4, introduced into an external heating rotary kiln 5 and heated to 750-1000 deg.C to reduce ZnO to Zn with a coke-oven gas contg. at least 10% hydrogen as a reducing gas. The obtained molten Zn vapor is cooled in a Zn condenser 8 to form the metallic Zn powder 9 which is recovered. The reducing gas freed from ZnO in the rotary kiln and still contg. hydrogen is used as a gas 11 for heating the kiln 5, a gas 12 for a dust drier 4 and a gas 13 to be added to the reducing gas 6 of the kiln 5, and the remaining heat energy is effectively utilized.

4. 发明专利

JPH0632609A PRODUCTION OF POWDERY ACTIVATED CARBON 失效
公开(公告)号：JPH0632609A
公开(公告)日：1994-02-08
申请号：JP21074792
申请日：1992-07-16
申请人： NIPPON STEEL CORP
发明人： NASU YUUKI , SAKAKIBARA MICHIAKI
IPC分类号： C01B31/08 , C01B31/10 , C01B31/12 , D01F9/14 , D01F9/15
摘要： PURPOSE:To obtain a powdery activated carbon having increased specific surface area by using a formed raw material consisting of a coal-based isotropic pitch carbon fiber having fiber diameter smaller than a specific level, subjecting the raw material to infusibilization, carbonization and activation and finely crushing the product. CONSTITUTION:A coal-based isotropic pitch carbon fiber having fiber diameter of /g.

5. 发明专利

JPH05131175A METHOD FOR DISCRIMINATING AND SORTING COPPER COIL IN SHREDDER SCRAP 失效
公开(公告)号：JPH05131175A
公开(公告)日：1993-05-28
申请号：JP32140191
申请日：1991-11-08
申请人： NIPPON STEEL CORP
发明人： AIKAWA YASUHIRO , NAGANUMA YOICHI , MOTOMURA MASAKI , SAKAKIBARA MICHIAKI
IPC分类号： B07C5/342
摘要： PURPOSE:To automatically discriminate and sort a copper coil causing a problem of quality deterioration when iron scrap obtained by classifying treatment is reutilized as an iron source. CONSTITUTION:A conveyor line 6 feeding shredder scrap 7 is illuminated by a non-directional white illuminator 1 and the illuminated shredder scrap 7 is photographed by a color TV camera 2 and, on the basis of the photographing signal thereof, the enamel painting color bonded to the surface of a copper coil is extracted. When the value of the extraction signal of the enamel painting color is a preset threshold value or more, it is discriminated that the copper coil is present on the conveyor line 6 and the position of the coil is specified to generate a sorting signal and the scrap pieces containing the copper coil within a specific region are automatically discharged out of the conveyor line 6 on the basis of the sorting signal to discriminate and sort iron scrap from the copper coil.

6. 发明专利

JPH03294789A METHOD OF AND APPARATUS FOR RECOVERYING VALUABLE GAS OF HEAT ACCUMULATION TYPE HEAT EXCHANGER 失效
公开(公告)号：JPH03294789A
公开(公告)日：1991-12-25
申请号：JP9499990
申请日：1990-04-12
申请人： NIPPON STEEL CORP
发明人： SATO TAKERO , SUZUKI HIROYUKI , KOTSURU HIROYUKI , KAWAMURA TAKAFUMI , SAKAKIBARA MICHIAKI
IPC分类号： F28D17/02 , C10J3/72
摘要： PURPOSE:To perform a self-completing recovery of valuable gas as combustible gas for purging operation to be discharged when an air blowing period is changed over to an air blowing period by a method wherein a gas recovery branch pipe having a flow valve is disposed at a bottom part of a heat accumulation chamber or a chimney passage from the bottom part to a chimney and then an opening or closing of the valve is adjusted by sensing composition or calorie value of gas discharged when the heat accumulation chamber is to be purged and before or after the heat accumulation chamber is to be purged. CONSTITUTION:A branch pipe is 12 is disposed in a chimney passage 8 leading from a heat accumulation chamber 1 to a chimney 10. A chimney passage valve 11 is closed when combustible gas from the heat accumulation chamber 1 is purged and flows in the chimney passage and a charing-over valve 13 is opened and then combustible gas can be stored in a gas holder 14 through a gas cleaning device 15. In this case, when gas components are analyzed, valuable gas components are reduced due to mixing of the purged gas and becomes required minimum values, the charing-over valve 13 is closed, the chimney passage valve 11 is opened and then an operation for flowing out the purged gas to the chimney is carried out.

7. 发明专利

JPH03273093A MANUFACTURE OF SYNTHETIC NATURAL GAS 失效
公开(公告)号：JPH03273093A
公开(公告)日：1991-12-04
申请号：JP7162490
申请日：1990-03-20
申请人： NIPPON STEEL CORP
发明人： KOTSURU HIROYUKI , SATO TAKERO , KAWAMURA TAKAFUMI , SUZUKI HIROYUKI , SAKAKIBARA MICHIAKI
IPC分类号： C10J3/72 , C10L3/10
摘要： PURPOSE:To make it possible to produce a synthetic natural gas highly efficiently in the whole system by enriching, in a rapid thermal decomposition process of coal, hydrogen in a gas obtained by the decomposition of coal and adding the gas to finely divided coal, which makes it possible to obtain a hydrogen- enriched gas to be added in the reaction system of rapid decomposition of coal. CONSTITUTION:In a high-temperature decomposition step of coal wherein combustible gases, tar and char are produced by the decomposition of coal by mixing finely divided coal with a non-oxidizing gas, components of the produced gas other than hydrogen are removed, for example, by the PSA(pressure swing adsorption) to obtain a gas enriched with hydrogen, the produced gas is supplied into a hydrogenation gasification reactor to be brought into contact with finely divided coal under prescribed conditions, thereby producing a synthetic natural gas. According to the above, a gas enriched with hydrogen to be added can be obtained in the reaction system of rapid decomposition of coal, a synthetic natural gas in the total system can be produced with high efficiency, and also the apparatus can be simplified as a whole.

8. 发明专利

JPH0244577B2 失效
公开(公告)号：JPH0244577B2
公开(公告)日：1990-10-04
申请号：JP2722086
申请日：1986-02-10
申请人： NIPPON STEEL CORP
发明人： SAKAKIBARA MICHIAKI , OGUCHI TETSUO , MURANAKA MASANOBU , KATO HIDEO
IPC分类号： B01J2/02 , C04B5/02

9. 发明专利

JPH0135882B2 失效
公开(公告)号：JPH0135882B2
公开(公告)日：1989-07-27
申请号：JP15974381
申请日：1981-10-07
申请人： NIPPON STEEL CORP
发明人： FUJIMOTO MASAMI , NAGAO YOSHIICHI , FUJIURA MASAMI , SAKAKIBARA MICHIAKI
IPC分类号： C04B5/06 , C04B5/00 , C21B3/08 , F27D15/00 , F27D17/00

10. 发明专利

JPS63248750A TREATMENT OF MOLTEN SLAG 失效
公开(公告)号：JPS63248750A
公开(公告)日：1988-10-17
申请号：JP8246987
申请日：1987-04-03
申请人： NIPPON STEEL CORP , SEIREN SHINKIBAN GIJUTSU KENKY
发明人： SAKAKIBARA MICHIAKI , MURANAKA MASANOBU , IZAWA TETSUO
IPC分类号： B01J2/02 , C04B5/02 , F27D15/02

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