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21. 发明专利

JPH04242923A CARBON ELECTRODE FOR PLASMA ETCHING 失效
公开(公告)号：JPH04242923A
公开(公告)日：1992-08-31
申请号：JP41661690
申请日：1990-12-29
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： OSHIMA HIROAKI , TANAKA SEIJIRO , OGUCHI MASAO
IPC分类号： H01L21/302 , H01L21/3065
摘要： PURPOSE:To provide a carbon electrode for plasma etching where an organization of the electrode is homogeneous and highly dense and highly reinforced as compared with a carbon electrode for conventional plasma etching. CONSTITUTION:After dipping tar. pitch, etc., to an isotropic highly dense carbon material with mesocarbon micro beads as a main raw material, carbonization treatment or graphite treatment is performed and a title item is constituted by a carbon material which is obtained by repeating this dipping carbonization treatment (graphite treatment) once or for several times.

22. 发明专利

JPH04139075A ALUMINA-CHROMIA MONOLITHIC REFRACTORY 失效
公开(公告)号：JPH04139075A
公开(公告)日：1992-05-13
申请号：JP26021090
申请日：1990-09-27
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： MORI JUNICHIRO , YOSHIMURA MATSUICHI , OGUCHI MASAO
IPC分类号： C04B35/66
摘要： PURPOSE:To improve the corrosion and slag permeation resistances of refractories used for lining a molten metal vessel, especially a ladle by adding a specified percentage of chromium oxide to refractory starting materials based on aluminous starting material. CONSTITUTION:Chromium oxide is added to refractory starting materials based on aluminous starting material by 7-20wt.% to obtain this alumina-chromia monolithic refractories. In case of 20wt.%, the strength of the refractories is remarkably lowered and the extent of erosion is increased. Chemically synthesized chromium oxide having >=99wt.% Cr2O3 content and

23. 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

24. 发明专利

JPH04124212A PRODUCTION OF PLUG FOR GAS BLOWING 失效
公开(公告)号：JPH04124212A
公开(公告)日：1992-04-24
申请号：JP24485790
申请日：1990-09-14
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： YUMOTO TOSHIHIDE , YOSHIDA KIYOSHI , OGUCHI MASAO
IPC分类号： C21C5/48 , B22D1/00 , C21C7/072
摘要： PURPOSE:To easily produce a plug for gas blowing by applying, in a vertical direction, a solution containing sublimable substance to the side face of a conical inner sheath made of refractory, filling an outer sheath onto the above, removing the sublimable substance by means of heating, and forming slits. CONSTITUTION:A truncated cone-shaped inner sheath 2 in which the upper cross section is smaller than the lower cross section is formed of a dense high alumina refractory castable containing >=95% Al2O3. A solution prepared by dissolving a sublimable substance, such as naphthalene, benzoic acid, and camphor, by a solvent, such as ether, is applied to the side face of the above inner sheath 2 into the state of strips 4 at prescribed spaces in a vertical direction. Subsequently, an outer sheat 3 of high alumina refractory consisting of the same material as the above inner sheath 2 is further formed on the above surface, and then, the sublimable substance is sublimed and removed by means of heating up to 110-220 deg.C, by which slits 5 for gas blowing are formed. By this method, a plug 1 for gas blowing excellent in strength and durability can be produced.

25. 发明专利

JPH0455373A HOT SPRAYING REPAIR MATERIAL 失效
公开(公告)号：JPH0455373A
公开(公告)日：1992-02-24
申请号：JP16617490
申请日：1990-06-25
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： YOSHIMURA MATSUICHI , MORI JUNICHIRO , OGUCHI MASAO , KAWAKAMI TATSUO
IPC分类号： C04B35/66
摘要： PURPOSE:To obtain the hot spraying repair material which is excellent in adhesive properties at the wide temp. zone while securing excellent corrosion resistance by blending aluminum salt of organic acid and sodium silicate or silica sol with refractory aggregate. CONSTITUTION:The hot spraying repair material is obtained by blending 0.5-3 wt.% aluminum salt of organic acid and 0.3-3 wt.% sodium silicate or silica sol with refractory aggregate. Sodium silicate and silica sol of a silicate-based binder show good adhesive properties at the low temp. zone of 800 deg.C or below. However, the adhesive properties are deteriorated by the effect of shrinkage, etc., of a constructed body when the temp. at a time of spraying is regulated to the high temp. region of 800 deg.C or more. Therefor the adhesive properties at the intermediate temp. zone of 800-1200 deg.C are enhanced by the effect of alumina sol which is produced by blending aluminum salt of organic acid. Accordingly, the hot spraying repair material excellent in adhesive properties at the intermediate temp. zone from the low temp. is obtained by simultaneously utilizing both.

26. 发明专利

JPH03199170A MORTAR COMPOSITION 失效
公开(公告)号：JPH03199170A
公开(公告)日：1991-08-30
申请号：JP34324889
申请日：1989-12-27
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： WATANABE NOBUTAKA , YOSHIMURA MATSUICHI , OGUCHI MASAO , KAWAKAMI TATSUO , SHIMIZU MASASHIGE
IPC分类号： C04B35/66
摘要： PURPOSE:To obtain the above compsn. which can extremely shorten the time for adhesion, has extremely good shape holdability and is adequately usable as the joint material of bricks having a particularly low water absorptivity by compounding a specific small quantity of cut cords into a refractory mortar compsn. CONSTITUTION:The mortar compsn. is obtd. by compounding the refractory mortar compsn. with the cut cords (e.g.: braided cords, fiber cords, knitted cords, bundled cords, etc., of cotton, nylon, glass fibers, carbon fibers, etc., having the diameters of usually about 1/4 the joint thickness to the joint thickness and the lengths of usually about 1 to 10 the joint thickness) at 0.01 to 1 pt.wt. per 100 pts.wt. refractory aggregate (e.g.: SiC, Si, natural magnesia clinker, chamotte, etc.) in this compsn. The time for adhesion of the mortar compsn. is drastically reduced as compared with the time for adhesion of the conventional mortar compsn. to the extent of not impairing the ease of application. In addition, the shape holdability is extremely good and, therefore, the generation of the deformation of the joints, etc., during the application is obviated and the good installed bricks are obtd.

27. 发明专利

JPH03115175A REFRACTORY CONCRETE MATERIAL AND WATER-REDUCING AGENT FOR CONCRETE 失效
公开(公告)号：JPH03115175A
公开(公告)日：1991-05-16
申请号：JP25540689
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： C04B35/66 , C04B28/04
摘要： PURPOSE:To reduce the amt. of an expensive water-reducing agent added by adding citric acid or sodium citrate and a defoaming agent to the above material contg. the water-reducing agent having high performance such as a condensation product of alkylallylsulfonate. CONSTITUTION:0.01-0.1wt.% condensation product of alkylallylsulfonate and/or condensation product of ligninsulfonate as a water-reducing agent having high performance, 0.05-0.2wt.% one or more among citric acid, oxalic acid, tartaric acid, sodium citrate and potassium sodium tartarate and 0.005-0.05wt.% defoaming agent are added to 100wt.%, in total, of 60-80wt.% refractory aggregate and 20-40wt.% Portland cement to obtain a refractory concrete material. By adding citric acid, etc., to the water-reducing agent, air entraining action is accelerated and flowability is improved, so the amt. of the water-reducing agent added can be remarkably reduced. Since excess air entraining action makes concrete porous and reduces the strength, the defoaming agent is added.

28. 发明专利

JPH03106556A PARTIAL CASTING REPAIRING DEVICE FOR CASTABLE REFRACTORY 失效
公开(公告)号：JPH03106556A
公开(公告)日：1991-05-07
申请号：JP23880289
申请日：1989-09-14
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： MORI JUNICHIRO , MITSUI HARUO , YOSHIMURA MATSUICHI , OGUCHI MASAO , KAWAKAMI TATSUO , YOSHIDA TSUTOMU
IPC分类号： B22D41/02 , C21C5/44 , C21C7/00 , F27D1/16
摘要： PURPOSE:To facilitate the repairing work by constituting a cylindrical casting repairing body so as to be flexible, and so that it can be installed along the inside and the outside surface of a container to be repaired, and also, the bottom part can abut on the surface to be repaired. CONSTITUTION:A partial casting repairing device 1 is constituted so as to be flexible by an expanding/contracting means 11, so that it can be installed along the inside peripheral surface of a repairing part 4 of a monolithic refractory of a molten metal container 2, etc., such as a ladle, etc. Also, in the lower peripheral part of a cylindrical body 5 of the repairing device 1, bottom part closing members 6, 12 are constituted so that they can abut on the repairing part 4 and can be attached so as to be freely tiltable and rotatable. In such a way, a local repair of a lining refractory of the molten metal container 2, etc., can be executed easily and efficiently.

29. 发明专利

JPH03103366A CASTABLE REFRACTORY FOR MOLTEN IRON PRETREATING LANCE 失效
公开(公告)号：JPH03103366A
公开(公告)日：1991-04-30
申请号：JP23877489
申请日：1989-09-14
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： TORITANI YASUNOBU , YAMANE TOSHIO , OGUCHI MASAO , KAWAKAMI TATSUO
IPC分类号： C04B35/66 , C21C1/02 , C21C1/04
摘要： PURPOSE:To improve oxidation, melting loss, thermal shock resistance, etc., by using a specific amount of needlelike petroleum coke subjected to hydrophilization treatment as a carbonaceous material for a castable refractory used in Al2O3-SiC-C-based lances for pretreating molten iron. CONSTITUTION:(A) Alumina is mixed with (B) silicon carbide, (C) 3-15wt.% needlelike petroleum coke subjected to hydrophilization treatment and (D) a required aggregate (e.g. fine silica powder), a binder (e.g. alumina cement), etc., to produce a castable refractory used in pretreating lances for molten iron. Furthermore, the needlelike petroleum coke must be heat-treated at a high temperature of about >=1300 deg.C and have about >=95% fixed carbon content. The hydrophilization treatment of the needlelike cake is carried out by coating the surface thereof with a very small amount of a surfactant (e.g. an alkylbenzenesulfonic acid-based surfactant).

30. 发明专利

JPH0360470A CASTABLE REFRACTORY FOR PRETREATING MOLTEN PIG IRON 失效
公开(公告)号：JPH0360470A
公开(公告)日：1991-03-15
申请号：JP19745589
申请日：1989-07-28
申请人： KAWASAKI REFRACTORIES CO LTD
发明人： TORITANI YASUNOBU , YAMANE TOSHIO , OGUCHI MASAO , KAWAKAMI TATSUO
IPC分类号： C04B35/66 , C04B35/80
摘要： PURPOSE:To improve durability by blending Al2O3 as a base with cylindrical Al2O3 of a specified diameter and a specified length and raw material of spinel (Al2O3.MgO). CONSTITUTION:This castable refractory for pretreating molten pig iron is obtd. by blending >=70wt.% Al2O3 with 20-50wt.% cylindrical Al2O3 of 2-5mm diameter and 20-40mm length and >=30wt.% raw material of spinel (Al2O3.MgO). Clay, fine SiO2 powder, fine Al2O3 powder, etc., for ensuring flowability and a binder such as Al2O3 cement may properly be added as required.

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