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11. 发明专利

JPH01305851A PRODUCTION OF UNFIRED MGO-C BRICK 失效
公开(公告)号：JPH01305851A
公开(公告)日：1989-12-11
申请号：JP13612688
申请日：1988-06-02
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： YAMAMOTO JUSAKU , HASEGAWA SUSUMU , SHINTANI HIROTAKA , KAWAKAMI TATSUO
IPC分类号： C04B35/043 , C04B35/04
摘要： PURPOSE:To obtain an unfired brick having improved spalling resistance without deteriorating corrosion resistance by adding Y2O3 or CaO stabilized zirconia granules and fine unstabilized zirconia powder to magnesia clinker and subjecting them to molding, hardening and heat treatment. CONSTITUTION:Magnesia clinker having >=95% MgO content is used as a base and =90wt.% ZrO2 content and

12. 发明专利

JPH01289549A NOZZLE FOR CONTINUOUS CASTING OF STEEL 失效
公开(公告)号：JPH01289549A
公开(公告)日：1989-11-21
申请号：JP11887288
申请日：1988-05-16
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： TAKESHITA SHIGEYUKI , DAIMON MASAYA , HASEGAWA SUSUMU , SHINTANI HIROTAKA , KAWAKAMI TATSUO
IPC分类号： B22D11/10 , B22D41/54
摘要： PURPOSE:To prevent nozzle clogging and to improve product quality by forming a lining layer contg. respectively specific weight % of CaO, MgO and C into the inside hole of the nozzle for continuous casting. CONSTITUTION:The lining layer 30 is formed of the compsn. contg., by weight, 40-90% CaO, 0-50% MgO and 0-20% C on the inside hole of the nozzle 10. The CaO component in the lining layer 30 adsorbs alumina (Al2O3) which is a deoxidized product and forms the reactant of the CaO-Al2O3 system when said product is adsorbed thereon. This reactant is lowered in m.p. and viscosity and is discharged away. Further, the MgO component intensifies the strength of the lining compsn. and a proper ratio of the C component lowers the wettability of the lining layer 30 with the molten steel. the respective components of the CaO, MgO and C, therefore, prevent the nozzle clogging by the deposits in the nozzle 10; in addition, the quality of the product is improved by casting of the clean steel.

13. 发明专利

JPH01131055A PRODUCTION OF UNCALCINED REFRACTORY 失效
公开(公告)号：JPH01131055A
公开(公告)日：1989-05-23
申请号：JP28893387
申请日：1987-11-13
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： YAMAMOTO JUSAKU , HASEGAWA SUSUMU , SHINTANI HIROTAKA , KAWAKAMI TATSUO
IPC分类号： C04B35/103 , C04B35/10
摘要： PURPOSE:To obtain the title refractory of alumina carbon having excellent corrosion resistance, spalling resistance and durability, by blending an alumina refractory raw material with thermally decomposable carbon black, unstable zirconia fine powder and a binder, granulating, molding and subjecting to heat- setting treatment. CONSTITUTION:60-90wt.% alumina refractory raw material containing >=95wt.% Al2O3 is blended with 3-10wt.% thermally decomposable carbon black, 5-30wt.% unstable zirconia fine powder having >=90wt.% ZrO2 content and

14. 发明专利

JPH01122972A UNBURNED SHAPED REFRACTORY 失效
公开(公告)号：JPH01122972A
公开(公告)日：1989-05-16
申请号：JP27986987
申请日：1987-11-05
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： SATO TSUTOMU , HASEGAWA SUSUMU , SHINTANI HIROTAKA , KAWAKAMI TATSUO
IPC分类号： C04B35/80 , C04B35/76
摘要： PURPOSE:To improve spalling resistance and bending strength by adding specific amounts of carbon fibers and aluminum or its alloy fibers whose diameters and lengths are specified respectively in an unburned shaped refractory containing refractory aggregate. CONSTITUTION:(A) 100pts.wt. of refractory aggregate such as silica or alumina, (B) an organic binder such as a phenolic resin, (C) 0.5-10pts.wt. of carbon fibers of 0.005-0.5mm diameter and 1-15mm length, (D) 0.5-10pts.wt. of metal lic fibers made of aluminum or its alloy of 0.005-0.5mm diameter and 1-15mm length, are mixed so that the total of components (C) and (D) is 1-15pts.wt. to form the subject unburned shaped refractory product. The product is espe cially excellent in the strength and spalling resistance in a low-temperature range from 200-600 deg.C and an intermediate temperature range from 600-1,000 deg.C.

15. 发明专利

JPS61155257A MANUFACTURE OF ZIRCONIA REFRACTORIES 失效
公开(公告)号：JPS61155257A
公开(公告)日：1986-07-14
申请号：JP27691084
申请日：1984-12-26
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： HASEGAWA SUSUMU , SHINTANI HIROTAKA , KAWAKAMI TATSUO
IPC分类号： C04B35/48

16. 发明专利

JPH07232958A CARBON-CONTAINING UNBURNED REFRACTORY 失效
公开(公告)号：JPH07232958A
公开(公告)日：1995-09-05
申请号：JP2059094
申请日：1994-02-17
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： TSUCHIYA ICHIRO , MAEDA TAKASHI , SHINTANI HIROTAKA
IPC分类号： C04B35/00 , C04B35/66
摘要： PURPOSE:To produce a carbon-containing unburnt refractory improved in resistance to oxidation while eliminating an evil due to addition of a readily oxidizable substance in the carbon-containing unburned refractory. CONSTITUTION:A carbonaceous material in an amount of 3-30 pts.wt., in which 95-70 pts.wt. graphite and 5-30 pts.wt. >=1 kind metal powder, alloy powder and compd. among Al, Mg, Ca, Si, B, Zr, Cr and Ti are mixed and a pretreatment of calcining at 700-1700 deg.C in a coke breeze or nitrogen atmosphere is executed, is compounded to 100 pts.wt. starting material for the refractory.

17. 发明专利

JPH05319936A SINTERED ZRB2 COMPOSITE MATERIAL 失效
公开(公告)号：JPH05319936A
公开(公告)日：1993-12-03
申请号：JP12883392
申请日：1992-05-21
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： SASAKI KIMIAKI , SHINTANI HIROTAKA
IPC分类号： C04B35/581 , C04B35/58
摘要： PURPOSE:To provide a ZrB2 ceramic material having dense and homogeneous texture and excellent strength, corrosion resistance, thermal shock resistance, etc. CONSTITUTION:The material contains 20-65wt.% of zirconium diboride (ZrB2), 15-55wt.% of aluminum nitride (AlN), 5-35wt.% of boron nitride (BN) and, in addition to the above, 0.5-6wt.% of a sintering assistant consisting of one or more substances selected from among zirconium nitride (ZrN), vanadium nitride (VN), niobium nitride (NbN) and tantalum nitride (TaN).

18. 发明专利

JPH05237818A 失效
公开(公告)号：JPH05237818A
公开(公告)日：1993-09-17
申请号：JP4452092
申请日：1992-03-02
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： ARIYOSHI HIDEAKI , OTA HIROMICHI , SHINTANI HIROTAKA
IPC分类号： B28B1/26 , C01B21/068
摘要： PURPOSE:To make the title mold superior in wear resistance and mechanical strength, prolong the life of the mold and provide an Si3N4-BN material casting mold capable of adapting to molding of a product in a wider field in relation to a slurry casting mold. CONSTITUTION:In a slurry casting mold, the quality of the material of a mold main body 1 holding a slip is made into constitution so that the same is made of Si3N4-BN material ceramic.

19. 发明专利

JPH04139059A CARBON-CONTAINING UNFIRED REFRACTORY 失效
公开(公告)号：JPH04139059A
公开(公告)日：1992-05-13
申请号：JP26155090
申请日：1990-09-28
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： TSUNETSUGU KUNIO , ISHII HIROMASA , SHINTANI HIROTAKA , OGUCHI MASAO
IPC分类号： C04B35/103 , C04B35/10
摘要： PURPOSE:To improve oxidation resistance by adding boron powder to a refractory material prepd. by blending a carbon material with an aluminous refractory material. CONSTITUTION:A refractory material is prepd. by blending 5-30 pts.wt. carbon material such as flake graphite with 70-95 pts.wt. aluminous refractory material and 0.5-5 pts.wt. boron powder of

20. 发明专利

JPH0413470A METHOD FOR PREVENTING SURFACE CRACKING OF SLAB 失效
公开(公告)号：JPH0413470A
公开(公告)日：1992-01-17
申请号：JP11818290
申请日：1990-05-07
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： TAKESHITA SHIGEYUKI , SHINTANI HIROTAKA , KAWAKAMI TATSUO
IPC分类号： B22D11/10 , B22D41/50
摘要： PURPOSE:To decrease the heat extraction quantity of a molten steel and to prevent the generation of the surface longitudinal cracking of a slab by providing a hollow part for heat insulation around the molten steel flow hole of an immersion nozzle from the upper part of the immersion nozzle body to the lower part and pouring the melt of a middle-carbon steel contg. carbon at a specific ratio through the immersion nozzle at a high velocity to a casting mold for molding the slab. CONSTITUTION:The immersion nozzle 1 for continuous casting is provided with the hollow part 6 for heat insulation concentrically with the molten steel flow hole 4 from the upper part of the straight cylinder-shape immersion nozzle body 3 to the lower part. The slab is continuously cast by passing the melt of the middle-carbon steel contg. 0.09 to 0.15wt.% carbon through the immersion nozzle 1 at the high velocity. The heat extraction quantity of the molten steel from the immersion nozzle is prevented, by which the temp. drop is hindered and the generation of the surface longitudinal cracking of the slab is surely prevented. The slab of the middle-carbon steel having good quality is thus cast with high productivity.

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