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1. 发明专利

JPH11302085A BAKING REPAIR MATERIAL EXCELLENT IN FLOWABILITY 失效
公开(公告)号：JPH11302085A
公开(公告)日：1999-11-02
申请号：JP10997898
申请日：1998-04-20
申请人： KUROSAKI REFRACTORIES CO
发明人： MIZUMA YOSHIHIRO , KUGIMIYA MASAHIRO , SASAKI TOSHIHISA
IPC分类号： C04B35/66 , F27D1/16
摘要： PROBLEM TO BE SOLVED: To obtain a repair material which does not undergo a change with the lapse of time even if it is allowed to stand at a high temp. and a high humidity over a long time, has good flowability and can be baked in a short time by incorporating specified amts. of a magnesian and/or aluminous refractory aggregate, coumarone resin which melts and fluidifies at a specified temp. and a carbon bond type org. binder. SOLUTION: The repair material contains 65-87 wt.% magnesian and/or aluminous refractory aggregate, 3-10 wt.% coumarone resin having 90-120 deg.C softening point and 10-25 wt.% carbon bond type org. binder. The coumarone resin fluidizes the refractory aggregate and the org. binder in the early stage of heating of the repair material and then it is carbonized and burned to form a carbon bonded body together with the org. binder, accordingly the strength of an applied body is exhibited and maintained. The org. binder is preferably hard pitch or powdery novolak resin having >=90 deg.C softening point. The grain size of the refractory aggregate is

2. 发明专利

JPH11267820A MENDING MATERIAL FOR INNER FACE OF MOLTEN STEEL PASSING HOLE AND, MENDING METHOD FOR INNER FACE OF MOLTEN STEEL PASSING HOLE USING ITS MENDING MATERIAL 失效
公开(公告)号：JPH11267820A
公开(公告)日：1999-10-05
申请号：JP7634298
申请日：1998-03-24
申请人： KUROSAKI REFRACTORIES CO
发明人： IMANAKA TATSUYA , TAIRA TOSHIMITSU , KONO SHOKI , MASUDA TOSHIHIDE
IPC分类号： B22D41/02 , F27D1/16
摘要： PROBLEM TO BE SOLVED: To provide a mending means for surely mending an inner face of a molten steel passing hole simply and at low cost when mending the inner face of the molten steel passing hole. SOLUTION: A mending material insertion work is carried out by cleaning the molten steel passing hole 1 of an upper nozzle 5 with oxygen after discharging the molten steel, observing a molten loss status of the nozzle hole and, inserting a material, which is composed of a plastic refractory material 2 fastened sheet, having a thickness of smaller than a space between an inner diameter of the molten steel passing hole and an outer diameter of a cylindrical compact 3, into the molten steel passing hole 1 at an outer face of the cylindrical compact 3, by using a pressing jig 6. The sheet refractory material is then pressed and fastened to the inner face of the passing hole 1 using a force with which a diameter of a thin plate is going to be expanded as a result that a restraint force of the cylindrical compact 3 is vanished after the sheet is inserted.

3. 发明专利

JPH11248367A METHOD FOR CLEANING INDUSTRIAL KILN AND CLEANING MATERIAL USED THEREFOR 失效
公开(公告)号：JPH11248367A
公开(公告)日：1999-09-14
申请号：JP5253898
申请日：1998-03-04
申请人： KUROSAKI REFRACTORIES CO
发明人： MATSUNOBU KENICHI , NAKAMURA YASUO , MATSUO MASATAKA , KUWANO SHIGEKI
IPC分类号： F27D1/16
摘要： PROBLEM TO BE SOLVED: To prevent clogging of a cleaning material conveying route, reducing fuel consumption, operating time by efficiently melting a slag or a ground metal adhered to a lining of an industrial kiln and completely removing it. SOLUTION: In the method for cleaning by melting to remove a slag or a ground metal adhered to an industrial kiln by bringing a flame into contact with it comprising the steps of injecting a gas 3 for the flame from a plurality of sets of burners 1 concentrically provided at annular injection ports arranged with many hole groups, outside annular injection ports 2 toward an object, a cleaning material from next annular injection ports 4, further the gas 3 from an inside annular injection ports to burn it, and injecting melt blowing gas from a central injection port 5, thereby melting the slag or the metal to blow out to remove it. A ratio of flowing ratio of the gas for the flame to the gas for blowing out the melt is set to 1:4 to 1:16. Further, as cleaning material of iron powder, 85% or more of pure iron is contained in the powder, and 85 to 65 wt.% of the entirety of fine powder having a particle size of 0.075 mm or less is used.

4. 发明专利

JPH11246266A ALUMINA-ZIRCONIA-GRAPHITE REFRACTORY MATERIAL 失效
公开(公告)号：JPH11246266A
公开(公告)日：1999-09-14
申请号：JP5392298
申请日：1998-03-05
申请人： KUROSAKI REFRACTORIES CO
发明人： OGATA KOJI , IIZUKA SHOJI
IPC分类号： B22D11/10 , B22D41/54 , C04B35/103 , C04B35/48
摘要： PROBLEM TO BE SOLVED: To improve the thermal shock resistance and corrosion resistance of an alumina-zirconia-graphite refractory material, especially when the material is reused or intermittently used for continuous casting. SOLUTION: This refractory material is prepared by adding an org. binder to the compounded material of 5 to 70 wt.% zirconia-contg. material and the balance of alumina and graphite, kneading, forming and calcining. The zirconia- contg. material has >=0.2 mm and

5. 发明专利

JPH11240747A PLATE BRICK 失效
公开(公告)号：JPH11240747A
公开(公告)日：1999-09-07
申请号：JP4754898
申请日：1998-02-27
申请人： KUROSAKI REFRACTORIES CO
发明人： AKAMINE KEIICHIROU
IPC分类号： B22D11/10 , B22D41/28 , C04B35/101
摘要： PROBLEM TO BE SOLVED: To provide a plate brick having excellent thermal shock resistance and excellent corrosion resistance without using zirconia mullite and alumina zirconia. SOLUTION: This plate brick is obtained by adding an organic binder to a composition comprising 20-50 wt.% of electromelted alumina having granule diameter of 1-5 mm, 10-30 wt.% of calcinated alumina having an average particles of =95 wt.%, respectively, the plate brick having excellent corrosion resistance is obtained. When the SiO2 content of the used composition is

6. 发明专利

JPH11193415A BRICK BLOCK LAYING STRUCTURE OF CONVERTER HEARTH 失效
公开(公告)号：JPH11193415A
公开(公告)日：1999-07-21
申请号：JP36103697
申请日：1997-12-26
申请人： KUROSAKI REFRACTORIES CO , NISSHIN STEEL CO LTD
发明人： ONISHI YUTAKA , KIKUKAWA SHIYOUJI , KEYA KEIJI
IPC分类号： C21C5/44 , F27D1/06
摘要： PROBLEM TO BE SOLVED: To improve the efficiency and workability of a brick laying work of a hearth of a converter provided with a gas-blowing tuyere in a hearth bottom, and to suppress ingress of the base metal between single bricks laid on the furnace bottom and generation of cracks caused by the stress owing to mutual pushing between adjacent bricks. SOLUTION: A plurality of gas-blowing tuyeres are arranged in a square shape. A hearth of a converter is built using blocks which are integrated with a plurality of conventional single formed bricks 4 with the adhesive. The blocks 41-44 are of the optimum shape in which the number and arrangement of the single formed bricks to be integrated are changed taking into consideration the workability by a part to be installed. Ingress of the base metal is prevented by setting the application thickness of the adhesive to be 0.5 mm, and generation of cracks caused by the stress owing the mutual pushing between bricks is suppress by providing a clearance regulating brick formed of the single formed bricks lowered between the block and a tuyere receiving brick 2, and between the block and a special form brick around a furnace wall.

7. 发明专利

JPH11189460A HIGHLY CORROSION RESISTANT ALUMINA-CHROMIUM-BASED REFRACTORY 失效
公开(公告)号：JPH11189460A
公开(公告)日：1999-07-13
申请号：JP35849097
申请日：1997-12-25
申请人： KUROSAKI REFRACTORIES CO
发明人： KAJI NOBUHIKO
IPC分类号： C04B35/101 , F27D1/00
摘要： PROBLEM TO BE SOLVED: To obtain an alumina-chromium-based refractory having improved spalling resistance without damaging corrosion resistance and useful as the refractory for a lining of a melting furnace for a dust and an industrial waste. SOLUTION: This alumina-chromium-based refractory is obtained by mixing, compacting and firing a formulation comprising 5-40 wt.% sintered chromium powder including >=50% particles having >=0.21 mm particle diameters in a particle distribution and containing 0.5-3 wt.% TiO2 and 0.5-5 wt.% SiO2 , 2-20 wt.% chromium oxide, 5-25 wt.% high alumina powder including >=50% particles having >=0.21 mm particle diameters and containing 18-42 wt.% SiO2 , 1-8 wt.% one or more kinds of powders of clay, silica and zircon, having

8. 发明专利

JPH11189459A ALUMINA-CHROMIUM-BASED REFRACTORY 失效
公开(公告)号：JPH11189459A
公开(公告)日：1999-07-13
申请号：JP35848097
申请日：1997-12-25
申请人： KUROSAKI REFRACTORIES CO
发明人： KAJI NOBUHIKO
IPC分类号： C04B35/101 , F27D1/00
摘要： PROBLEM TO BE SOLVED: To obtain an alumina-chromium based refractory capable of being applied to the refractory for a liner of a melting furnace of waste, and having improved spalling resistance without damaging corrosion resistance. SOLUTION: This alumina-chromium-based refractory has 20-55 wt.% coarse grain having >=1.0 mm particle diameter in the whole formulation, and comprises 18-42 wt.% SiO2 component, 5-25 wt.% high alumina powder including >=50 wt.% particles having >=0.21 mm particle diameter, 3-20 wt.% chromium oxide, 1-8 wt.% one or more kinds of clay, silica and zircon, having

9. 发明专利

JPH11179531A SLIDING NOZZLE DEVICE 失效
公开(公告)号：JPH11179531A
公开(公告)日：1999-07-06
申请号：JP35147597
申请日：1997-12-19
申请人： KUROSAKI REFRACTORIES CO
发明人： TAIRA TOSHIMITSU , TAKAGI NOBUAKI
IPC分类号： B22D41/34 , B22D41/24 , B22D41/40
摘要： PROBLEM TO BE SOLVED: To provide a sliding nozzle device, in which surface pressure can be loaded even in the case of changing the positions of retreating limit or advancing limit in a sliding metallic frame and the release of the surface pressure load can simply be executed so as to be possible to secure a gap for inserting a surface pressure block. SOLUTION: In the sliding nozzle device provided with a fixed metallic frame 1, an openable metallic frame 2 freely shifted to the fixed metallic frame 1, a sliding metallic frame 3 set between the fixed metallic frame 1 and the operable metallic frame 2 and slidable to the limit positions and a surface pressure additional mechanism for pressing the openable metallic frame 2 to the fixed metallic frame 1 at the time of shifting the openable metallic frame 2 to the surface pressure loading position W, the openable metallic frame 2 is linked with the sliding metallic frame 3 and also, when the openable metallic frame 2 reaches the surface pressure loading position W, a surface pressure loading member 12 for obstructing what the slidable metallic frame 3 reaches the limit positions, is arranged so as to be freely attached/detached between the openable metallic frame 2 and the slidable metallic frame 3. Wherein, the limit positions means the advancing limit and the retreating limit in the shiftable stoke range.

10. 发明专利

JPH11131169A CERMET MATERIAL, AND CORROSION RESISTING MACHINE PARTS USING THE SAME 失效
公开(公告)号：JPH11131169A
公开(公告)日：1999-05-18
申请号：JP29142597
申请日：1997-10-23
申请人： KUROSAKI REFRACTORIES CO
发明人： MISHIMA MASAAKI
IPC分类号： C22C29/04
摘要： PROBLEM TO BE SOLVED: To provide a cermet material capable of replacing various corrosion resisting stainless alloys, alloy steels, cemented carbides, dense ceramic materials, or organic high polymer materials such as plastics, which are conventionally used for various machine parts for metal working but have various defects, and having acid corrosion resistance enabling use in a strongly acidic atmosphere or liquid and also to provide corrosion resisting machine parts. SOLUTION: The cermet material contains 95-60 wt.% of a ceramic phase formed of crystalline grains of a titanium carbonitride solid solution having a composition consisting of 30-60 wt.% TiC and 40-70 wt.% TiN and also contains, in the spacing among the crystalline grains of the above ceramic phase, 5-40 wt.% of a metallic component, as a binding phase, consisting of an alloy composed essentially of Co and Cr and having acid corrosion resistance. Further, the ceramic phase is formed of respective crystalline grains of titanium carbonitride solid solution and molybdenum carbide.

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