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61. 发明专利

JPH0477358A ALUMINA-CARBON BASE NON-CALCINED REFRACTORY 失效
公开(公告)号：JPH0477358A
公开(公告)日：1992-03-11
申请号：JP19229990
申请日：1990-07-19
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： SATO TSUTOMU , SHINTANI HIROTAKA , OGUCHI MASAO , NAKAJIMA MASAYOSHI , MUROI MICHINORI
IPC分类号： C04B35/043 , C04B35/04 , C04B35/10 , C04B35/103
摘要： PURPOSE:To increase the slug resistance property by adding the specified quantity of a magnesia-chrominum based raw material into an alumina-carbon base refractory. CONSTITUTION:This refractory incorporates 3-70wt.% of the magnesia-chrominum based raw material in the refractory blended with the alumina based raw material and the carbon base raw material. Generally, the magnesia-chrominum based raw material has the chemical formula expressed by Mg(Fe)>>[Al,Fe,Cr2O3]O. This compound forms easily a solid solution with alumina and has the residual linear expanding property accompanying 5-10% of the volume expansion. Thus, a crack at a joint at the time of cooling the furnace is hardly produced in the wall of the furnace consisting of piled bricks, and the falling of the bricks caused by the crack at the joint and also the infiltration of the molten iron and steel into the joining parts are avoided, thus the occurrence of unexpected trouble caused by the abnormal damage of the metallurgical furnace caused by the refractory is prevented. When the adding quantity of the magnesia-chrominum based raw material is base than a lower limit, the improvement of the corrosion resistance and the effect on the increase in the residual linear expansion are insufficient and in the case of exceeding an upper limit, the strength after utilizing for a long period is reduced.

62. 发明专利

JPH03204165A METHOD FOR EXECUTING LINING WORK IN MOLTEN METAL VESSEL 失效
公开(公告)号：JPH03204165A
公开(公告)日：1991-09-05
申请号：JP34236489
申请日：1989-12-29
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： YOSHIMURA MATSUICHI , OGUCHI MASAO , KAWAKAMI TATSUO
IPC分类号： B22D41/02
摘要： PURPOSE:To enable extension of service life of a molten metal vessel by manufacturing a core with pouring refractory material, setting this core into the molten metal vessel subjected to the lining work and pouring the pouring refractory material between the molten metal vessel and the core to execute the lining work. CONSTITUTION:The pouring refractory material is poured between the core 2 formed with the pouring refractory material used for the pouring work in the molten metal vessel 1 and the molten metal vessel 1. By this method, it is unnecessary that the core 2 is controlled and removed, and the lining work is easily executed. Further, by executing this core 2 working, corrosion is reduced and partial change of shape and thickness of the core 2 is easily executed. By this method, large labor saving is executed to the lining work in the molten metal vessel 1, and by using this core, the corrosion ratio can be reduced and the service life of molten metal vessel 1 can be extended.

63. 发明专利

JPH03183664A CASTABLE REFRACTORY 失效
公开(公告)号：JPH03183664A
公开(公告)日：1991-08-09
申请号：JP31939789
申请日：1989-12-08
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： IIDA MASAKAZU , MORI JUNICHIRO , WATANABE NOBUTAKA , YOSHIMURA MATSUICHI , OGUCHI MASAO , KAWAKAMI TATSUO
IPC分类号： C04B35/66
摘要： PURPOSE:To obtain castable refractories improving durability and chiefly used for a molten metal vessel by adding large granules having a specified diameter range and an angle-free smooth shape to refractory starting materials in a specified weight ratio. CONSTITUTION:Large granules of Al2O3, MgO, SiO2 or other known material having a dense structure with

64. 发明专利

JPH03115513A METHOD FOR DETECTING EROSION OF REFRACTORY WALL 失效
公开(公告)号：JPH03115513A
公开(公告)日：1991-05-16
申请号：JP25406289
申请日：1989-09-29
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： MITSUI HARUO , YAMANE TOSHIO , OGUCHI MASAO , KAWAKAMI TATSUO
IPC分类号： C21B7/24
摘要： PURPOSE:To easily and accurately supervise erosion rate in a refractory wall and to restrain the erosion by fitting flow rate detectors and temp. detectors and detecting characteristic variations of the flow rate and the temp., etc., of gas for cooling the refractory wall. CONSTITUTION:Air of the gas for cooling is caused to flow in piping 5 embedded in the refractory wall 1 for molten iron tapping trough through inlet pipe 6, and the temp. at surface side of the refractory wall 1 can be cooled at about 50-100 deg.C, and the erosion rate of refractory wall 1 exposed to the molten iron can be made to little and the durability is improved. Further, the gas for cooling flowing in the piping 5 is heated through the refractor wall 1 and the characteristic values of the gas for cooling at inlet pipe 6 side and discharge pipe 7 side of the piping 5 can be detected with the temp. detectors 8, 9, pressure detectors 10, 11 and flow rate detectors 12, 13, respectively, and data processing can be executed to the detected data through a thermometer 14, pressure gage 15 and flow rate gage 16 with a computer 17, and the erosion rate of refractory wall 1 and abnormal condition of piping 5 can be supervised.

65. 发明专利

JPH0345553A CARBON-CONTAINING REFRACTORY 失效
公开(公告)号：JPH0345553A
公开(公告)日：1991-02-27
申请号：JP18299389
申请日：1989-07-14
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： TSUNETSUGU KUNIO , TSUCHIYA ICHIRO , OGUCHI MASAO , KAWAKAMI TATSUO
IPC分类号： C04B35/03 , C04B35/043
摘要： PURPOSE:To form a low-melting and high-viscosity film and improve oxidation resistance by adding CaB6 to a refractory material composed of a carbonaceous raw material and basic refractory aggregate. CONSTITUTION:A carbon-containing refractory obtained by adding 1-8 pts.wt. CaB6 having

66. 发明专利

JPH02180766A CAST MONOLITHIC REFRACTORIES AND REFRACTORY AGGREGATE 失效
公开(公告)号：JPH02180766A
公开(公告)日：1990-07-13
申请号：JP33280488
申请日：1988-12-28
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： MORI JUNICHIRO , YOSHIMURA MATSUICHI , OGUCHI MASAO , KAWAKAMI TATSUO
IPC分类号： C04B35/66
摘要： PURPOSE:To form basic cast monolithic refractories preventing the infiltration of slag and having high purity, high corrosion and thermal spalling resistances by blending refractory aggregate treated with pitch with refractory superfine powder and a binder. CONSTITUTION:Refractory aggregate (e.g. magnesia clinker) whose surface and open pores have been coated with pitch is blended with a required amt. of refractory superfine powder (e.g. superfine powder of alumina or silica) and a binder to form cast monolithic refractories. Refractory aggregate is preferably kneaded with heated pitch under reduced pressure so as to allow pitch to infiltrate into the open pores.

67. 发明专利

JPH02164762A REFRACTORIES CONTAINING CARBON 失效
公开(公告)号：JPH02164762A
公开(公告)日：1990-06-25
申请号：JP32133388
申请日：1988-12-19
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： TSUNETSUGU KUNIO , OGUCHI MASAO , KAWAKAMI TATSUO
IPC分类号： C04B35/043 , C04B35/04
摘要： PURPOSE:To improve oxidation resistance by blending a specified refractory material with Zr powder and Mg-Zr alloy powder. CONSTITUTION:A refractory material consisting of 70-95wt.% MgO-based basic refractory raw material such as sea water magnesia and 30-5wt.% carbonaceous raw material such as earthy graphite is blended with 0.5-5wt.% Zr powder of

68. 发明专利

JPH0288468A MAGNESIA-CALCIA REFRACTORIES 失效
公开(公告)号：JPH0288468A
公开(公告)日：1990-03-28
申请号：JP24208788
申请日：1988-09-26
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： UNOSAKI NOBUYUKI , NAGAFUNE MARI , ISHII HIROMASA , TSUCHIYA ICHIRO , OGUCHI MASAO , KAWAKAMI TATSUO
IPC分类号： C04B35/66
摘要： PURPOSE:To obtain refractories having superior spalling and thermal shock resistances by blending MgO-CaO refractory aggregate contg. synthetic clinker made of CaO coated with MgO with aragonite type calcium carbonate. CONSTITUTION:100 pts.wt. refractory aggregate consisting of 20-95wt.% MgO and 80-5wt.% CaO and contg. synthetic MgO-CaO clinker made of 60-40wt.% CaO coated with 40-60wt.% MgO is blended with 0.5-5 pts.wt. aragonite type calcium carbonate of 0.5-10mm diameter to obtain magnesia-calcia refractories. The aragonite type calcium carbonate is converted into calcite type at 330-480 deg.C at the time of calcining in the production of the refractories. Since the conversion is accompanied by about 8% volume expansion, many microcracks occur in brick. These microcracks produce a stress propagation preventing effect at the time of use and are very effective in preventing the extension of cracks due to spalling.

69. 发明专利

JPH0269363A HIGH ALUMINA CASTABLE REFRACTORY 失效
公开(公告)号：JPH0269363A
公开(公告)日：1990-03-08
申请号：JP21894388
申请日：1988-08-31
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： SAGAWA IKUHIKO , YAMANE TOSHIO , OGUCHI MASAO , KAWAKAMI TATSUO
IPC分类号： C04B35/66
摘要： PURPOSE:To produce high alumina castable refractory to be hardly cracked, having high heat shock resistance by contg. a specified amt. of beta-alumina in high alumina refractory. CONSTITUTION:The high alumina castable refractory contains 5-70wt.% beta- alumina. As beta-alumina raw material above-mentioned, beta-alumina contg. about 92-95wt.% Al2O3 and about 4-7wt.% Na2O, can be used. As the refractory raw material other than the beta-alumina, the substance having high alumina content such as fused alumina, sintered alumina, is used. As a binder, any kind of alumina cement and hydraulic alumina are pref. The castable refractory above-mentioned is required to have >= about 90wt.% alumina content and that having alumina content smaller than about 90wt.% is undesirable, because of lowering corrosion resistance thereof.

70. 发明专利

JPH01278470A HIGH-ALUMINA BASED CALCINED REFRACTORY BRICK 失效
公开(公告)号：JPH01278470A
公开(公告)日：1989-11-08
申请号：JP10729088
申请日：1988-04-28
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： NAGAFUNE MARI , TSUCHIYA ICHIRO , OGUCHI MASAO , KAWAKAMI TATSUO
IPC分类号： C04B35/00 , C04B35/10 , C04B35/101
摘要： PURPOSE:To improve heat-resistant spalling resistance by blending a high-purity alumina based material with metallic magnesium having a specific particle diameter. CONSTITUTION:High-alumina calcined refractory brick obtained by blending 100pts.wt. refractory aggregate (having normally about =70% Al2O3 with 0.01-0.3pt.wt., preferably 0.05-0.1pt.wt. metallic magnesium (having normally

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