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41. 发明专利

JPH01122643A SUBMERGED NOZZLE FOR CONTINUOUS CASTING 失效
公开(公告)号：JPH01122643A
公开(公告)日：1989-05-15
申请号：JP28149787
申请日：1987-11-06
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： WATANABE NOBUTAKA , TAKESHITA SHIGEYUKI , OGUCHI MASAO
IPC分类号： B22D11/10 , B22D41/50
摘要： PURPOSE:To form a compound having low melting point with precipitated alumina in molten steel and to prevent clogging of submerged nozzle with alumina by arranging a bottom part made of a CaO refractory in the submerged nozzle for a tundish in continuous casting apparatus. CONSTITUTION:At the time of pouring the molten steel in the tundish into a mold for continuous casting through the submerged nozzle 1 in the continuous casting apparatus for the molten steel, Al2O3 existing as dispersing in the molten steel in the case of aluminum killed steel, etc., is precipitated from the molten steel, and molten steel flowing hole 2 in the submerged nozzle 1 is clogged and the molten steel from the tundish comes to be impossible to pour into the mold for continuous casting and the continuous casting operation is interrupted. In this case, a well 4 is arranged below molten steel discharging holes 3 at lower part of the submerged nozzle 1 and the bottom member 5 composing of the refractory containing CaO as the main component and SiO2, etc., is set in the well 4. As the Al2O3 precipitated from the molten steel forms the compound having low melting point together with CaO and SiO2 and flows out from the nozzle 1, the interruption of the continuous casting operation caused by deposit and clogging of Al2O3 in the flowing hole 2 of the nozzle 1 is prevented.

42. 发明专利

JPH0648821A REFRACTORY BODY CONTAINING CARBON 失效
公开(公告)号：JPH0648821A
公开(公告)日：1994-02-22
申请号：JP22068692
申请日：1992-07-27
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： TSUNETSUGU KUNIO , HAGIWARA NOBORU , MIYAGAWA SABURO , OGUCHI MASAO
IPC分类号： C04B35/00 , C04B35/04 , C04B35/043 , C04B35/10 , C04B35/103
摘要： PURPOSE:To contribute to the prolongation of the life of a furnace by improving the oxidation resistance and the corrosion resistance of a refractory body containing carbon without lowering the spalling resistance. CONSTITUTION:A metal alloy of Mg-Ce in which atomic ratio of Mg/Ce is in a range of 12/1 to 1/1 is added in an amount of 0.5-10wt.% (expressed in terms of outer percents) to a refractory material consisting of 5-90wt.% of a carbon-based raw material and 10-95wt.% of a refractory raw material. In this way, the structures of the surface and the inside of a refractory body can become finely densified and the durability is improved.

43. 发明专利

JPH0631412A PLATE BRICK OF SLIDING NOZZLE FOR EXTRA-LOW CARBON STEEL 失效
公开(公告)号：JPH0631412A
公开(公告)日：1994-02-08
申请号：JP21225192
申请日：1992-07-16
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： SAKAGUCHI MASAYUKI , HIROTA TETSUO , TANAKA SEIJIRO , OGUCHI MASAO
IPC分类号： B22D11/10 , B22D41/32 , C04B35/00 , C04B35/66 , C04B35/68
摘要： PURPOSE:To improve the service life of the plate brick of a sliding nozzle for continuous casting equipment particularly in casting of extra-low carbon steels. CONSTITUTION:Mesophase carbon is compounded at 1 to 10 pts.wt. with 100 pts.wt. refractory material compounded with one or >=2 kinds of refractory aggregate subjected to grain size adjustment Elimination of the carbon by oxidation during use of the plate brick is suppressed by compounding the chemically stable mesophase carbon with the plate brick, by which the service life of the plate brick is enhanced.

44. 发明专利

JPH05330899A CARBON-CONTAINING BASIC REFRACTORY 失效
公开(公告)号：JPH05330899A
公开(公告)日：1993-12-14
申请号：JP16835592
申请日：1992-06-03
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： TSUNETSUGU KUNIO , MIYAGAWA SABURO , OGUCHI MASAO
IPC分类号： C04B35/00 , C04B35/04 , C04B35/043
摘要： PURPOSE:To compensate the defects of carbonaceous stock and to allow carbon- contg. basic refractories to satisfactorily exhibit excellent characteristics in the field of metallurgy. CONSTITUTION:A refractory material contg. 5-30wt.% carbonaceous stock and 70-95wt.% basic refractory stock is prepd. and titanium diboride is added to the refractory material by 0.1-10wt.% or metallic Al is further added by 0.1-10wt.%. The oxidation and spalling resistance of the resulting carbon-contg. basic refractories can be enhanced from the inside and outside.

45. 发明专利

JPH05319898A CARBON CONTAINING REFRACTORY 失效
公开(公告)号：JPH05319898A
公开(公告)日：1993-12-03
申请号：JP15583592
申请日：1992-05-21
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： TSUNETSUGU KUNIO , MIYAGAWA SABURO , OGUCHI MASAO
IPC分类号： C04B35/00
摘要： PURPOSE:To develop a carbon containing refractory excellent in oxidation resistance and spalling resistance by mixing a specific small quantity of SiB3 and metallic Al with a fire resisting material containing a carbonaceous raw material. CONSTITUTION:A refractory material for metallurgy is produced by blending 0.1-1wt.% SiB3 and 0.1-5wt.% metallic Al to the base of all the fire resisting material with the fire resisting material of the composition containing 70-95wt.% fire resisting raw material such as oxide base, carbide base or nitride base, 5-30wt.% carbonaceous material such as artificial graphite or cokes. Silica triboride is oxidized on the surface of the refractory to form B2O3, and at the same time, a high viscous fused liquid is formed to cover the surface of the refractory and the vanishing of the carbonaceous raw material caused by oxidation is prevented. Aluminum is oxidized at the vicinity of the surface of the refractory to form Al2O3 and to form a dense layer and the oxidation resistance is improved. As a result, the refractory material capable of preventing the waste of the carbonaceous raw material caused by oxidation and excellent in oxidation resistance and spalling resistance is obtained.

46. 发明专利

JPH05208861A CARBON-CONTAINING ALUMINA REFRACTORIES 失效
公开(公告)号：JPH05208861A
公开(公告)日：1993-08-20
申请号：JP3871492
申请日：1992-01-28
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： TSUNETSUGU KUNIO , MIYAGAWA SABURO , OGUCHI MASAO
IPC分类号： C04B35/622 , C04B35/00
摘要： PURPOSE:To improve oxidation resistance and corrosion resistance of a carbon- containing refractories without reducing spalling resistance or hot strength. CONSTITUTION:To a refractory raw material containing 5 to 90wt.% carbonaceous raw material and 10 to 95wt.% alumina refractory raw material, an Al-Ti alloy powder having an atomic ratio of Al to Ti within a range of (25/1) to (1/25) is added in an amount of 0.1 to 10 outer wt.%.

47. 发明专利

JPH05117044A THERMAL SPALLING-RESISTANT CASTABLE REFRACTORY 失效
公开(公告)号：JPH05117044A
公开(公告)日：1993-05-14
申请号：JP30682991
申请日：1991-10-24
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： YOSHIMURA MATSUICHI , MORI JUNICHIRO , OGUCHI MASAO
IPC分类号： C04B35/66
摘要： PURPOSE:To improve the durability in use in a steel bath part by improving the thermal spalling and corrosion resistance. CONSTITUTION:An alumina.spinel-based castable refractory prepared by blending an alumina clinker with a spinel clinker is blended with an alumina.zirconia clinker in an amount so as to provide 5-20wt.% content thereof.

48. 发明专利

JPH05105532A REFRACTORY FOR VESSEL USED IN PRETREATING MOLTEN IRON 失效
公开(公告)号：JPH05105532A
公开(公告)日：1993-04-27
申请号：JP26627591
申请日：1991-10-15
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： TSUNETSUGU KUNIO , MIYAGAWA SABURO , OGUCHI MASAO
IPC分类号： B22D41/02 , C04B35/66
摘要： PURPOSE:To enhance oxidation resistance without impairing slag infiltration, spalling and corrosion resistance of a refractory used in a vessel for pretreating molten iron, e.g. a ladle and a torpedo car. CONSTITUTION:A refractory is formed by adding magnesium boride (MgB2) in an amount of 0.3-3wt.% expressed in terms of outer percentage to a refractory material composed of 70-95wt.% refractory raw material of at least any one of alumina-based raw materials and silicon carbide raw materials and 5-30wt.% carbonaceous raw material.

49. 发明专利

JPH0557409A NOZZLE FOR CONTINUOUS CASTING 失效
公开(公告)号：JPH0557409A
公开(公告)日：1993-03-09
申请号：JP24702391
申请日：1991-08-30
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： TAKESHITA SHIGEYUKI , SHINTANI HIROTAKA , OGUCHI MASAO
IPC分类号： B22D11/10 , B22D41/54 , C04B35/48 , C04B35/52
摘要： PURPOSE:To prevent nozzle clogging due to the sticking of alumina by forming an inner hole and a discharging hole part in an immersion nozzle for continuous casting with a material incorporating zirconia and graphite and adding BN, SiC and B4C. CONSTITUTION:Surface of the inner hole in the nozzle is formed to sticky and smooth liquid phase layer. Raw material is constituted of, in weight, 45-85% ZrO2 and 5-20% flake graphite and further singly or jointly added with 5-50% BN, 2-20% SiC and 0.5-5% B4C. Further, by forming all raw material except the flake graphite to

50. 发明专利

JPH04371354A IMMERSION NOZZLE FOR CONTINUOUS CASTING 失效
公开(公告)号：JPH04371354A
公开(公告)日：1992-12-24
申请号：JP17308191
申请日：1991-06-18
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： TAKESHITA SHIGEYUKI , SHINTANI HIROTAKA , OGUCHI MASAO
IPC分类号： B22D11/10 , B22D41/54
摘要： PURPOSE:To prevent sticking of alumina, molten steel, etc., to inner hole of an immersion nozzle for continuous casting and to improve durability thereof. CONSTITUTION:In the inner hole side of immersion nozzle for continuous casting, nozzle clogging prevention material in which ZrC, SiC and B4C singly or jointly are added to zirconiagraphite main component, is set.

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