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91. 发明专利

JPH05170544A REFRACTORY FOR CONTINUOUS CASTING AND PRODUCTION PROCESS THEREOF 失效
公开(公告)号：JPH05170544A
公开(公告)日：1993-07-09
申请号：JP34355391
申请日：1991-12-25
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： SASAKI KIMIAKI , SHINTANI HIROTAKA
IPC分类号： B22D11/04 , C04B35/10 , C04B35/101 , C04B35/58 , C04B35/581 , C04B35/583 , C04B35/584
摘要： PURPOSE:To provide a refractory which is applicable to continuous casting installation and has such excellent corrosion resistance as casting operations can be prolonged not only in carbon steel but also in stainless steel and high alloy steel because the material satisfies the primary properties required for break rings in horizontal continuous casting to meet and the production process thereof. CONSTITUTION:Two or four different kinds of major starting materials selected from boron nitride, silicon nitride, aluminum nitride and alumina are mixed, then one or two materials of titanium nitride or zirconium nitride are added to the mixture in an amount of 1 to 15wt.% based on the main materials. The resultant mixture is formed and sintered at 1,600 to 1,950 deg.C in a non-oxidative atmosphere to give the objective refractory.

92. 发明专利

JPH0551247A CARBON-CONTAINING UNFIRED REFRACTORY 失效
公开(公告)号：JPH0551247A
公开(公告)日：1993-03-02
申请号：JP21091391
申请日：1991-08-22
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： TSUNETSUGU KUNIO , MIYAGAWA SABURO , SHINTANI HIROTAKA , OGUCHI MASAO
IPC分类号： C04B35/043 , C04B35/04
摘要： PURPOSE:To obtain excellent oxidation and corrosion resistances by adding Al-V alloy, powder having a prescribed atomic ratio of Al:V to a refractory material consisting of a carbonaceous material and a magnesian refractory material. CONSTITUTION:A refractory material is obtd. by blending 5-30wt.% carbonaceous material of

93. 发明专利

JPH04231371A CARBON-CONTAINING REFRACTORY 失效
公开(公告)号：JPH04231371A
公开(公告)日：1992-08-20
申请号：JP40940590
申请日：1990-12-28
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： TSUNETSUGU KUNIO , SHINTANI HIROTAKA , OGUCHI MASAO
IPC分类号： C04B35/103 , C04B35/10
摘要： PURPOSE:To obtain carbon-contg. refractories having improved oxidation resistance without deteriorating superior spalling resistance peculiar to carbon-contg. refractories. CONSTITUTION:A refractory material consisting of 5-30wt.% carbonaceous starting material and 70-95wt.% aluminous refractory material is prepd. and calcium hexaboride is added to the prepd. refractory material by 1-8wt.% of the amt. of the material.

94. 发明专利

JPH04193759A CARBON-CONTAINING BASIC REFRACTORY 失效
公开(公告)号：JPH04193759A
公开(公告)日：1992-07-13
申请号：JP32349290
申请日：1990-11-26
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： TSUNETSUGU KUNIO , SHINTANI HIROTAKA , OGUCHI MASAO
IPC分类号： C04B35/00 , C04B35/03 , C04B35/04 , C04B35/043
摘要： PURPOSE:To improve the oxidation resistance of the refractory by mixing a specified amt. of elemental B powder with the refractory material consisting of the carbon material and basic material in a specified weight ratio. CONSTITUTION:From 5 to 30wt.% of a carbon material such as graphite and 70-95wt.% of a basic material such as electrolytic MgO are mixed to obtain a refractory material. From 0.1 to 4wt.% of an increase of the elemental B powder having

95. 发明专利

JPH04130047A MAGNESIAN BURNED REFRACTORY BRICK 失效
公开(公告)号：JPH04130047A
公开(公告)日：1992-05-01
申请号：JP25359690
申请日：1990-09-20
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： UNOSAKI NOBUYUKI , ISHII HIROMASA , SHINTANI HIROTAKA , KAWAKAMI TATSUO
IPC分类号： C04B35/043 , C04B35/04
摘要： PURPOSE:To improve spalling resistance by adding a specified amt. of an Al2O3 source to MgO-based refractory starting material and carrying out kneading, molding and burning. CONSTITUTION:A blend prepd. by adding 0.5-10 pts.wt. one or more kinds of Al2O3 sources such as sintered Al2O3 and electrolytic Al2O3 and a proper amt. of a binder to 100 pts.wt. one or more kinds of MgO-based refractory starting materials such as natural magnesia clinker and seawater magnesia clinker is kneaded, molded into a prescribed shape and burned at 1,400-1,700 deg.C in an oxidizing atmosphere to obtain magnesian burned refractory brick having improved spalling resistance.

96. 发明专利

JPH0421562A PRODUCTION OF CHROME-MAGNESIA-BASED REFRACTORY 失效
公开(公告)号：JPH0421562A
公开(公告)日：1992-01-24
申请号：JP12165190
申请日：1990-05-11
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： UNOSAKI NOBUYUKI , ISHII HIROMASA , SHINTANI HIROTAKA , KAWAKAMI TATSUO
IPC分类号： C04B35/047 , C04B35/04 , C04B35/12 , C04B35/42
摘要： PURPOSE:To improve corrosion resistance to slag of a low basicity and obtain excellent durability by limiting the blending ratio of magnesia clinker with chrome mineral and grain size distribution of the chrome mineral. CONSTITUTION:A raw material at a weight ratio of magnesia clinker to chrome mineral within the range of (20:80)-(50:50) is burned to produce a chrome- magnesia-based refractory. In the process, the grain size is regulated so as to provide a grain size distribution of the chrome mineral based on the total amount of the aforementioned raw material as follows. 5-20wt.% grains having =60 deg.C temperature.

97. 发明专利

JPH0413471A METHOD FOR PREVENTING SURFACE CRACKING OF SLAB 失效
公开(公告)号：JPH0413471A
公开(公告)日：1992-01-17
申请号：JP11818390
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 heat insulating layer of a ceramics sheet around the molten steel flow hole of an immersion nozzle for continuous casting and pouring the melt of a middle-carbon steel contg. carbon at a specific ratio at a high velocity to a casting mold. CONSTITUTION:The immersion nozzle body 3 having a straight cylinder shape is provided with the heat insulating layer 6 embedded with the ceramics sheet concentrically with the molten steel flow hole 4 from the upper part thereof to the lower part. The slab is continuously cast by immersing the immersion nozzle 1 into the molten steel in the casting mold and discharging the molten steel toward the short side faces of the casting mold from discharge holes 5 on both sides. 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 as far as possible, 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.

98. 发明专利

JPH03205351A NOZZLE FOR CONTINUOUSLY CASTING STAINLESS STEEL 失效
公开(公告)号：JPH03205351A
公开(公告)日：1991-09-06
申请号：JP34403189
申请日：1989-12-29
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： TAKESHITA SHIGEYUKI , SHINTANI HIROTAKA , KAWAKAMI TATSUO
IPC分类号： B22D11/10 , B22D41/54 , C04B35/10 , C04B35/103
摘要： PURPOSE:To reduce loss amount of nozzle and improve oxidation resistance by blending a refractory raw material consisting of alumina and graphite with Mg-Al alloy and/or Al-Si alloy. CONSTITUTION:A refractory raw material of nozzle body consisting of at least 50-90wt.% alumina and 50-10wt.% graphite is blended with 1-10wt.% (expressed in terms of Al amount) Mg-Al alloy and/or Al-Si alloy.

99. 发明专利

JPH03205350A CARBON-CONTAINING UNBURNED REFRACTORY 失效
公开(公告)号：JPH03205350A
公开(公告)日：1991-09-06
申请号：JP34462589
申请日：1989-12-28
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： TSUNETSUGU KUNIO , TSUCHIYA ICHIRO , SHINTANI HIROTAKA , OGUCHI MASAO , KAWAKAMI TATSUO
IPC分类号： C04B35/043 , C04B35/04
摘要： PURPOSE:To improve hot strength, spalling resistance, oxidation resistance and corrosion resistance in intermediate temperature area by adding specific Al-Zn alloy powder to a refractory material consisting of a carbon raw material and MgO based refractory material. CONSTITUTION:0.5-10wt.% Al-Zn alloy powder having Al/Zn molar ratio of 80/20-50/50 and

100. 发明专利

JPH03205348A MAGNESIA-CARBON BRICK 失效
公开(公告)号：JPH03205348A
公开(公告)日：1991-09-06
申请号：JP34242789
申请日：1989-12-30
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： SATO TSUTOMU , SHINTANI HIROTAKA , KAWAKAMI TATSUO , NAKAJIMA MASAYOSHI , IMAI KENJI
IPC分类号： C04B35/043 , C04B35/04
摘要： PURPOSE:To improve coating properties and improve oxidation resistance, corrosion resistance and spalling resistance by adding magnesia-chrome clinker to a blend of magnesia raw material and carbon raw material. CONSTITUTION:5-50wt.% magnesia-chrome clinker containing 5-80wt.% MgO, 5-20wt.% Al2O3, 15-30wt.% Cr2O3, =3mm grain size and the mixture is kneaded, formed and dried at 100-500 deg.C and cured.

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