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1. 发明专利

JP2002001499A CONTINUOUS CASTING METHOD 失效
公开(公告)号：JP2002001499A
公开(公告)日：2002-01-08
申请号：JP2000188881
申请日：2000-06-23
申请人： NIPPON KOKAN KK , SHINAGAWA REFRACTORIES CO
发明人： WATANABE KYOJI , OSAKO TAKASHI , MAEDA HIROSHI , KATO AKIRA , FUJITA HIROKI , MORIWAKI MASAHIRO , YOSHIKAWA MICHITOKU
IPC分类号： B22D11/10 , B22D41/58
摘要： PROBLEM TO BE SOLVED: To provide a continuous casting method capable of improving the quality of a casting without choke of a nozzle. SOLUTION: When molten metal in a tundish is fed into a casting mold through an immersion nozzle having a spout, from a molten metal outflow opening to carry out continuous casting, a preheated gas is blown into the molten metal flowing in the immersed nozzle.

2. 发明专利

JP2000210761A CONTINUOUS CASTING METHOD, MOLTEN METAL POURING MECHANISM AND MOLTEN METAL POURING METHOD 失效
公开(公告)号：JP2000210761A
公开(公告)日：2000-08-02
申请号：JP32737799
申请日：1999-11-17
申请人： NIPPON KOKAN KK , SHINAGAWA REFRACTORIES CO
发明人： KATO AKIRA , WATANABE KYOJI , KURANAGA TAICHI , MURAKI YASUNORI , SHIBUYA KIYOBUMI , OSAKO TAKASHI , MAEDA HIROSHI , KUWANO SEIGO , MORIWAKI MASAHIRO , YOSHIKAWA MICHITOKU
IPC分类号： B22D11/10 , B22D41/36 , B22D41/42 , B22D41/50 , B22D41/60
摘要： PROBLEM TO BE SOLVED: To provide a continuous steel casting method by which the time for pouring the molten steel into a tundish can be extended in the state of closing a sliding nozzle. SOLUTION: When the molten steel in the tundish 1 is supplied into a mold from a molten steel pouring hole 3 provided at the bottom part through an upper nozzle 4, sliding nozzle 5 and immersion nozzle 6 and continuously cast, the upper nozzle 4 is heated to >=800 deg.C by a heater 21 provided inside the upper nozzle 4 and the sliding nozzle 5 is heated to >=500 deg.C by the heater provided inside the sliding nozzle 5, or the gas heated to >=600 deg.C through the sliding nozzle 5 is supplied into the molten steel, thereby the molten steel is poured into the tundish 1 in the state of closing the sliding nozzle 5, while stirring the molten steel, and then the sliding nozzle 5 is opened to start the casting.

3. 发明专利

JP2000153348A STRUCTURE FOR PROTECTING WIRING 失效
公开(公告)号：JP2000153348A
公开(公告)日：2000-06-06
申请号：JP32664298
申请日：1998-11-17
申请人： NIPPON KOKAN KK , SHINAGAWA REFRACTORIES CO
发明人： MURAKI YASUNORI , KURANAGA TAICHI , WATANABE KYOJI , KATO AKIRA , MORIWAKI MASAHIRO
IPC分类号： B22D11/10 , B22D41/58 , B22D41/60
摘要： PROBLEM TO BE SOLVED: To obtain a protecting structure for wiring, etc., which is used for process, such as iron-making process, and unnecessary to an exclusive utility and hard for cooling, etc., and a specific coating for heat prevention by inserting wires or the like used in a prescribed process into pipings of a process gas used in the process. SOLUTION: A molten steel pouring part in a tundish storing the molten steel at continuous casting time, has a tundish tuyere brick 10, and an upper nozzle 1 is inserted therein, and a nozzle hole 2 is formed along the perpendicular direction in the center part. Gas pipings 12 for supplying Ar gas for stirring the molten steel in the tundish, are connected with the lower part of the upper nozzle 1. Leading wires 6 are connected with plane-like exothermic bodies 4 arranged in an annular space part 3 formed at the outside of the nozzle hole 2 and compensating leading wires 8 are connected with thermocouples 7 embedded in the upper nozzle 1, and the leading wires 6, 8 are inserted into the pipings 12. Since the piping 12 has the heat resistance, the leading wires 6, 8 inserted therein, are protected from the heat of the molten steel.

4. 发明专利

JP2000153347A NOZZLE FOR POURING MOLTEN METAL 失效
公开(公告)号：JP2000153347A
公开(公告)日：2000-06-06
申请号：JP32658698
申请日：1998-11-17
申请人： NIPPON KOKAN KK , SHINAGAWA REFRACTORIES CO
发明人： MURAKI YASUNORI , KURANAGA TAICHI , WATANABE KYOJI , KATO AKIRA , MORIWAKI MASAHIRO
IPC分类号： B22D11/10 , B22D41/50 , B22D41/54 , B22D41/60
摘要： PROBLEM TO BE SOLVED: To provide a nozzle for pouring molten metal, with which almost 100% of hole opening ratio can efficiently be obtd. without clogging the nozzle hole and the application is not limited, in the case of pouring the molten metal by opening a molten metal pouring hole after holding the molten metal in a molten metal vessel, such as tundish, for a specific time. SOLUTION: In the nozzle 1 for pouring the molten metal used in the case of pouring the molten metal by opening the molten metal pouring hole with a sliding plate 11 after holding the molten metal into the molten metal vessel for a specific time, a nozzle body 2 having the nozzle hole 3 for pouring the molten metal and also having a space part 4 formed at the outside of the nozzle hole and a heating part 5 having an exothermic body 6 inserted in the space part 4 and heating the nozzle body 2 by generating the heat in the exothermic body 6 by supplying the electric current thereto, are provided to shut off the heat transfer to the nozzle body 2 from the molten metal by heating the nozzle body 2 with the heating part 5.

5. 发明专利

JPH06288684A ULTRAHIGH TEMPERATURE TESTING OR TREATING METHOD 失效
公开(公告)号：JPH06288684A
公开(公告)日：1994-10-18
申请号：JP12510292
申请日：1992-05-18
申请人： SHINAGAWA REFRACTORIES CO
发明人： ARASHI HARUO , ASAMI HAJIME , MORIWAKI MASAHIRO
IPC分类号： F27B17/02 , F27D11/02 , G01N3/00 , G01N3/18
摘要： PURPOSE:To conduct a treatment such as test to measure various physical properties, weld or hot press at an ultrahigh temperature in an oxidative atmosphere by using an ultrahigh temperature electric resistance furnace having a hollow cylindrical zirconia resistor heat generator. CONSTITUTION:A hollow cylindrical resistor heat generator 1 normally uses a zirconia heat generator and has a terminal 3 which has a predetermined length and thick diameters at both ends of the generator 2 having a small diameter at a center. In order to support the generator 1, upper and lower pipelike refractory materials 5 are provided, and leads 4 are buried therein. A zirconia cylindrical refractory material 6 and an alumina cylindrical refractory material 7 are sequentially disposed to surround the generator 1. In order to alleviate a thermal load to be applied to the material 6 and to prevent a ground fault from the generator 1, a space 8 is provided between the generator 1 and the material 6, and a preheating heater 9 is provided on a surface of the material 7. Vertically penetrating spaces 12 are formed in the generator 1 and the materials 5, a sample, etc., is inserted to be disposed in an ultrahigh temperature heating space 13 near a heat generating part 2.

6. 发明专利

JPH1144490A HOLLOW ZIRCONIA BASE HEAT GENERATING BODY 失效
公开(公告)号：JPH1144490A
公开(公告)日：1999-02-16
申请号：JP19836697
申请日：1997-07-24
申请人： SHINAGAWA REFRACTORIES CO
发明人： FUJII YOJI , MORIWAKI MASAHIRO
IPC分类号： F27D11/02 , C04B35/48 , H05B3/14
摘要： PROBLEM TO BE SOLVED: To reduce the dispersion of heat from a heat generating unit and contrive the saving of electric power consumption, the miniaturization of a furnace, the unification of temperature distribution in the furnace as well as the reduction of the manufacturing cost of the furnace by providing terminal units on the outside surface of the heat generating unit. SOLUTION: A heat generating unit 2a is provided at the central part of a hollow zirconia base heat generating body 1a and terminal units 3a are provided on both ends of the outside surface of the same while these units are formed integrally. The heat generating unit 2a is provided with a circular section while the terminal units 3a are provided with a square section respectively. Accordingly, a circular hollow part 12a, having proper size and length, is formed in the inside of the heat generating unit 2a whereby a specimen or a material to be treated can be heated in the part. The length of the heat generating unit 2a and the length of the terminal units 3a can be formed so as to be the same or so that the length of the heat generating unit can be longer than those of the terminal units. According to this method, the total length of the heat generating body 1a can be shortened. On the other hand, the terminal units 3a can be made so as to have a small size whereby an electric power, consumed in the terminal units, is reduced and the value of whole of electric power can be restrained.

7. 发明专利

JPH0912377A ACID-PROOF POROUS ALUMINA SINTERED BODY AND ITS PRODUCTION 失效
公开(公告)号：JPH0912377A
公开(公告)日：1997-01-14
申请号：JP18071395
申请日：1995-06-23
申请人： SHINAGAWA REFRACTORIES CO
发明人： ASAMI HAJIME , MORIWAKI MASAHIRO , MARUYAMA KAZUYUKI , SHIROHIGE SHUNSUKE
IPC分类号： C04B38/02 , C04B35/10 , C04B35/63
摘要： PURPOSE: To produce an acid-proof porous alumna sintered body suitable for use as a ceramic filter, etc. CONSTITUTION: Stock prepd. by kneading 100 pts.wt. alumina powder with 0.5-15 pts.wt. clay mineral, 0.25-25 pts.wt. water glass and 0.25-25 pts.wt. silica sol is dry-molded and fired to obtain the objective acid-proof porous alumina sintered body excellent in acid resistance and having 30-50% porosity and 10-50μm pore diameter. A molded body having a thin hollow cylindrical structure and fit for a ceramic filter, etc., can be easily and homogeneously formed by dry molding, shape retentivity is ensured and handling is easy.

8. 发明专利

JPH06287060A ELECTRICALLY CONDUCTIVE CERAMIC COMPOSITE HEAT-RESISTANT MATERIAL COMPOSITION 失效
公开(公告)号：JPH06287060A
公开(公告)日：1994-10-11
申请号：JP11770592
申请日：1992-05-11
申请人： SHINAGAWA REFRACTORIES CO
发明人： ARASHI HARUO , ASAMI HAJIME , MORIWAKI MASAHIRO
IPC分类号： C04B35/48 , C04B35/50 , H01B1/08 , H01M4/86
摘要： PURPOSE:To provide an electrically conductive ceramic composite heat-resistant material composition prevented from deterioration in its sintering, high in electrical conductivity at lower and medium temperatures as well as at elevated temperatures. CONSTITUTION:The composition consisting of lanthanum mangatite composed of (A) La1-xCaxMnO3 (0.05

9. 发明专利

JPH06122585A METHOD FOR GROWING SINGLE CRYSTAL 失效
公开(公告)号：JPH06122585A
公开(公告)日：1994-05-06
申请号：JP27615592
申请日：1992-10-14
申请人： SHINAGAWA REFRACTORIES CO
发明人： ARASHI HARUO , ASAMI HAJIME , MORIWAKI MASAHIRO
IPC分类号： C30B13/16 , C30B13/32 , C30B29/16 , H05B3/14 , H05B3/62
摘要： PURPOSE:To obtain a single crystal having a proper temperature distribution of a melting zone without any defect by growing the single crystal in the interior of an ultrahigh-temperature electric resistance furnace equipped with a hollow cylindrical type zirconia heating element. CONSTITUTION:Vertically movable and rotatable shafts 16 and 16' are installed in the interior of a hollow cylindrical type zirconia heating element 1 provided in an ultrahigh-temperature electric resistance furnace. Rodlike single crystals 17 and 17' are inserted from the upper and lower parts into the shafts 16 and 16'. The ends of the single crystals 17 and 17' in the upper and lower parts are brought into contact in an ultrahigh-temperature heating space 13 of the heating element 1 and a current is passed through the heating element 1 while rotating the upper single crystal 17 at 0.1-100r.p.m. and the lower single crystal 17' at 0-100r.p.m. in the mutual opposite directions. Thereby, a melting zone 18 is heated to grow the objective single crystal.

10. 发明专利

JPH09245941A HEATING SUBSTANCE OF ZIRCONIA 失效
公开(公告)号：JPH09245941A
公开(公告)日：1997-09-19
申请号：JP5005996
申请日：1996-03-07
申请人： SHINAGAWA REFRACTORIES CO
发明人： ARASHI HARUO , FUJII YOJI , MORIWAKI MASAHIRO , NOBUHARA SEIJI
IPC分类号： H05B3/14
摘要： PROBLEM TO BE SOLVED: To make constant the internal temp. distribution and prolong the lifetime by shaping the end face of a terminal part of a heating element for a high temp. furnace in such a way as enclosing a part of a temp. running part, and suppressing heat radiation from the heat running part. SOLUTION: A heating part 22 having circular section and terminal parts 23 are made of ZrO2 material manufactured from zirconia fiber, etc., in a single piece structure where a circular hollow part 24 penetrates the inside so that a heating element 21 is formed. A lead of platinum is attached to each terminal part 23 and current is fed so that a temp. of 2000-2300 deg.C is generated in the hollow 24, and thereby a sample or a material to be treated is heated. A flange 25 enclosing a part of the heating part 22 is furnished on the periphery of that end face of the terminal part 23 which lies on the side with the heating part 22. The length of the flange 24 should be 20-95% of the heating part 22 while the inside diameter should be 6mm or more greater than the outside diameter of the part 22. Thereby heat radiation from the part 22 is shut off, and dispersion of the internal temp. distribution is lessened.

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