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1. 发明专利

JPH04144907A PRODUCTION OF HIGH-DENSITY CARBON MATERIAL 失效
公开(公告)号：JPH04144907A
公开(公告)日：1992-05-19
申请号：JP26639890
申请日：1990-10-05
申请人： NIPPON STEEL CHEMICAL CO , TOUHOKU KYOWA KAABON KK
发明人： USUHA HIDEHIKO , NISHIBATAKE TAKANORI , URUSHIMA TAKANORI , ORIMOTO MASARO , MORIKAWA FUMITO , SATO MASAHIRO
IPC分类号： C04B35/52 , B28B3/00 , C01B31/02 , C01B31/04
摘要： PURPOSE:To obtain a high-density carbon material giving a formed article resistant to deformation without generating dust in molding by granulating fine powder of carbonaceous material to get a specific hardness, filling the granules in a forming rubber, subjecting to rubber-press forming in fluid pressure and baking the formed product. CONSTITUTION:Finely crushed carbonaceous material (e.g. coal coke) is mixed with a binder (e.g. coal pitch) using a kneader and the obtained paste is cooled and crushed again. The obtained raw material powder is charged into a pin granulator together with a granulation liquid composed mainly of water (e.g. aqueous solution of methanol), granulated and dried to obtain particles having a particle hardness of 3-18g. The obtained granule is filled in a forming rubber, subjected to rubber-press forming under fluid pressure and baked or graphitized. The obtained high-density carbon material is suitable e.g. as a raw material for electrode for electrical discharge machining.

2. 发明专利

JPH04119965A PRODUCTION OF HIGH-DENSITY CARBON MATERIAL 失效
公开(公告)号：JPH04119965A
公开(公告)日：1992-04-21
申请号：JP23721890
申请日：1990-09-10
申请人： NIPPON STEEL CHEMICAL CO , TOUHOKU KYOWA KAABON KK
发明人： USUHA HIDEHIKO , NISHIBATAKE TAKANORI , URUSHIMA TAKANORI , ORIMOTO MASARO , MORIKAWA FUMITO , SATO MASAHIRO
IPC分类号： B30B11/00 , B01J2/10 , B28B3/00 , C04B35/52
摘要： PURPOSE:To increase the bulk packing density of a carbon material, to decrease the shrinkage for molding, to prevent the generation of dust during molding and to reduce the time for deaeration by molding a granulated powder of proper hardness prepared by a specified method. CONSTITUTION:A finely pulverized carbonaceous material and a pitch binder are kneaded in a kneader to prepare a paste, and then cooled and pulverized again to obtain the source powder material. This powder is introduced with a granulating liquid essentially comprising water into a pin granulator (rotary granulator) and granulated. The obtd. granular material is dried to have 3-18g powder hardness and put in a molding rubber, which is then molded by rubber pressing under hydraulic pressure. The molded body is calcined or graphitized. The granular material above described is preferably a sifted one having

3. 发明专利

JPH0664909A KNEADING AND CRUSHING OF CARBONOUS RAW MATERIAL 失效
公开(公告)号：JPH0664909A
公开(公告)日：1994-03-08
申请号：JP16907391
申请日：1991-06-14
申请人： NIPPON STEEL CHEMICAL CO , TOHOKU KYOWA CARBON KK
发明人： KAWANO YOICHI , NISHIBATAKE TAKANORI , HOTTA NORIO , USUHA HIDEHIKO , OGATA NOBUYOSHI , SATO MASAHIRO , WATANABE TADASHI
IPC分类号： B01F5/02 , B01F5/20 , B02C19/06 , C01B31/02 , C04B35/52 , C04B35/54
摘要： PURPOSE:To enable to decrease the number of steps from 3 to 4 steps required in conventional processes to only one step by jetting in a binding agent from at least one of gas jetting inlets in the case of crushing a carbonous raw material in a jet mill crusher. CONSTITUTION:In a horizontal cross section diagram of a jet-mill crusher a ceramic liner 2 is inserted in a mill frame 1 and a carbonous raw material (e.g. raw coke from coal tar pitch) is blown into a crushing zone 10 from a pressure nozzle 3 through a venturi nozzle by compressed air. Compressed air is, as a jet stream making gas, blown into from griding nozzles 4, 5, 6, 7, 8 and 9. A binding agent (e.g. a molten liquid binder pitch) having 90-95 deg.C softening point is fed from the nozzle 4 at 30-120 pts.wt. ratio based on 100 pts.wt. carbonous raw material. In the crushing zone 10 raw materials collide themselves to crush and binder coated micro-particles having

4. 发明专利

JPH05238716A 失效
公开(公告)号：JPH05238716A
公开(公告)日：1993-09-17
申请号：JP7327492
申请日：1992-02-25
申请人： NIPPON STEEL CHEMICAL CO , TOHOKU KYOWA CARBON KK
发明人： KAWANO YOICHI , USUHA HIDEHIKO , SATO MASAHIRO
IPC分类号： C01B31/02 , C01B31/04 , C04B35/00 , C04B35/52 , C04B35/632
摘要： PURPOSE:To stabilize the quality by adding a specified amt. of a binder to a carbonaceous main material separately more than twice and kneading the mixture above the m.p. of the binder. CONSTITUTION:A specified amt. of a binder such as pitch is firstly added to the carbonaceous main material such as pitch coke having mean particle diameter of

5. 发明专利

JPH05116032A MANUFACTURE OF ELECTRIC DISCHARGE MACHINING ELECTRODE 失效
公开(公告)号：JPH05116032A
公开(公告)日：1993-05-14
申请号：JP21802691
申请日：1991-08-05
申请人： NIPPON STEEL CHEMICAL CO , TOHOKU KYOWA CARBON KK
发明人： KAWANO YOICHI , NISHIBATAKE TAKANORI , KAJI MASAYOSHI , HOTTA NORIO , SATO MASAHIRO , MORIKAWA FUMITO
IPC分类号： B23H7/22 , B23H7/24
摘要： PURPOSE:To significantly reduce the consumption of an electrode in electric discharge machining, and to reduce the surface roughness of a work by crashing a mixture obtained by heating and kneading both a carbonaceous material that has been crashed so as to have an average grain size of 10mum or less and a binder, into particles whose average grain size is 100 to 150% that of the carbonaceous material. CONSTITUTION:A carbonaceous material that has been crashed so as to have an average grain size of 10mum or less and a binder are heated and kneaded for obtaining a mixture. This mixture is crashed into particles whose average grain size is 100 to 150% that of the carbonaceous material, and is subjected to CIP(cold isostatical press) molding, baking, and graphitization for obtaining a desired graphite electrode A for electric discharge machining. The bulk density of the electrode A can thus be significantly reduced, and unexpectedly, the consumption of the electrode at the time of electric discharge machining can be significantly reduced. Since the bulk density can be reduced, the rise in hardness and the percent defective due to crack at the time of baking and graphitization can be reduced. Further, the structure of the electrode A becomes uniform as the average grain size of the mixture approaches that of the carbonaceous material, and accordingly the consumption of the electrode can be reduced.

6. 发明专利

JPH05139833A PRODUCTION OF HIGH-DENSITY CARBON MATERIAL 失效
公开(公告)号：JPH05139833A
公开(公告)日：1993-06-08
申请号：JP41461990
申请日：1990-12-27
申请人： NIPPON STEEL CHEMICAL CO , TOHOKU KYOWA CARBON KK
发明人： KAWANO YOICHI , NISHIBATAKE TAKANORI , MORIKAWA FUMITO , SATO MASAHIRO
IPC分类号： C04B35/52 , C01B31/04
摘要： PURPOSE:To facilitate blending and preparation of raw materials and to obtain a carbon material having slight variability of quality, denseness and high strength by previously adding a given amount of a beta-resin concentrate to a carbonaceous raw material powder or a binder to give a paste and graphitizing the paste. CONSTITUTION:A pulverized carbonaceous raw material or a binder is premixed with a beta-resin concentrate. Or the concentrate is added to a mixture of the carbonaceous raw material and a pitch binder. The mixture having 10-50wt.% adjusted beta-resin content in the total blend is heated and kneaded by a kneader to give a paste. The paste is cooled and reground to give raw material powder, which is molded and burnt or graphitized.

7. 发明专利

JPH05139831A PRODUCTION OF HIGH-QUALITY CARBONACEOUS MOLDING 失效
公开(公告)号：JPH05139831A
公开(公告)日：1993-06-08
申请号：JP41461890
申请日：1990-12-27
申请人： NIPPON STEEL CHEMICAL CO , TOHOKU KYOWA CARBON KK
发明人： KAWANO YOICHI , KAJI MASAYOSHI , NISHIBATAKE TAKANORI , MORIKAWA FUMITO , SATO MASAHIRO
IPC分类号： C04B35/52
摘要： PURPOSE:To obtain a high-quality carbonaceous molding having slight variability of quality, denseness and high strength by adding an anti-frictional material such as graphite to a paste comprising a carbonaceous powder raw material and a binder, molding the blend in the state, burning or graphitizing to improve slipperiness of powder. CONSTITUTION:100 pts.wt. pulverized carbonaceous raw material (e.g. pitch cake, petroleum coke or calcined cake) is blended with 50-130 pts.wt. binder (e.g. coal tar or petroleum-based heavy pitch), heated and kneaded into a paste. The paste is cooled, mixed with 0.1-20 pts.wt. anti-frictional material, molded in a mixed state during or after secondary pulverizing, burnt or graphitized. The anti-frictional material is selected from carbon black and graphite.

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