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1. 发明专利

JPH11147755A SHAPED REFRACTORY MATERIAL 失效
公开(公告)号：JPH11147755A
公开(公告)日：1999-06-02
申请号：JP31222797
申请日：1997-11-13
申请人： NIPPON STEEL CORP , HARIMA CERAMIC CO LTD
发明人： GOTO KIYOSHI , NAKAMURA HISASHI , TSUCHINARI AKIHIRO , KOUSHIYO MINORU
IPC分类号： C04B35/043 , C04B35/047 , C04B35/443 , C04B35/46 , C04B35/66
摘要： PROBLEM TO BE SOLVED: To obtain a Cr-free, high-quality shaped refractory material usable as e.g. a lining refractory such as for metal refining vessels in e.g. steelmaking furnaces, cement kilns and glass melting furnaces, and designed to be highly resistant to corrosion, infiltration and spalling and sufficiently durable even in case of being used in the form of a secondary refining vessel for high-grade steel. SOLUTION: This shaped refractory material consists mainly of MgAl2 O4 -Mg2 TiO4 -based solid solution and magnesia with the weight ratio: [MgAl2 O4 -Mg2 TiO4 ]/magnesia of (10:90) to (40:60), pref. (15:85) to (30:70) and also contains at least one kind of ingredient selected from spinel, chromium ore, dolomite containing

2. 发明专利

JPH03295847A CARBON-CONTAINING REFRACTORY 失效
公开(公告)号：JPH03295847A
公开(公告)日：1991-12-26
申请号：JP9399390
申请日：1990-04-11
申请人： HARIMA CERAMIC CO LTD , NIPPON STEEL CORP
发明人： HANAGIRI SEIJI , HARADA SHIGEMI , MIYAGAWA YOSHIKAZU , TANAKA MASAHITO , HODOI TOSHIYUKI , TSUCHINARI AKIHIRO
IPC分类号： C04B35/00
摘要： PURPOSE:To improve the slag resistance, structural stability and corrosion resistance of a refractory by incorporating specified roseki material, carbonaceous or SiC material, refractory material and a binder. CONSTITUTION:By weight, 100% blend constituted of pyrophillite material contg. >=50% particles with 1 to 5mm particle size, 3 to 40% carbonaceous material (e.g. natural graphite) or SiC material, 7 to 92% refractory material of one or more kinds selected from high alumina material (e.g. synthetic mullite), magnesia material (e.g. sintered magnesia) and zirconia material (e.g. sintered zirconia) is blended with a binder (e.g. sodium silicate) and, if required, with 0.5 to 10% metallic material (e.g. silicone) and/or glass material (e.g. sodium phosphate).

3. 发明专利

JPH11147776A AMORPHOUS REFRACTORY 失效
公开(公告)号：JPH11147776A
公开(公告)日：1999-06-02
申请号：JP31222897
申请日：1997-11-13
申请人： NIPPON STEEL CORP , HARIMA CERAMIC CO LTD
发明人： GOTO KIYOSHI , TSUCHINARI AKIHIRO , KOUSHIYO MINORU
IPC分类号： C04B35/66
摘要： PROBLEM TO BE SOLVED: To enable a Cr-free high-quality amorphous refractory that is used as a lining refractory for a metal-refining vessel, as a steel furnace, a cement kiln, a glass-melting furnace and the like to have excellent corrosion resistance, infiltration resistance and spalling resistance and satisfactory durability, even when it is used as a vessel for ladle refining or for a vessel for secondary refining of high-class steel. SOLUTION: This amorphous refractory mainly comprises a MgAl2 O4 -Mg2 TiO4 solid solution and magnesia at a weight ratio of [MgAl2 O4 -Mg2 TiO4 ]: magnesia = 1:99-40:60, preferably 5:95-30:70. When necessary, a binder is admixed, in addition, one kind or 2 or more kinds of the following substances: spinel, chromium ores, less than 10 wt.% of CaO-containing dolomite, alumina, mullite, a carbon source such as graphite, SiC, zirconia, zircon, titania, silica and silica flower, buhlstone, and metallic powders.

4. 发明专利

JPH1163851A LINING STRUCTURE FOR CIRCULATING PIPE IN VACUUM DEGASSING APPARATUS 失效
公开(公告)号：JPH1163851A
公开(公告)日：1999-03-05
申请号：JP22939897
申请日：1997-08-26
申请人： HARIMA CERAMIC CO LTD , NIPPON STEEL CORP
发明人： AMANO MASAHIKO , GOTO KIYOSHI , TANAKA MANJIRO , TAKAGAKI HIROSHI , TSUCHINARI AKIHIRO
IPC分类号： C21C7/10 , F27D1/16
摘要： PROBLEM TO BE SOLVED: To improve durability of the lining of a circulating pipe in a vacuum degassing apparatus. SOLUTION: Side faces of bricks 8a positioned at a place where the buoyancy of molten steel works are inclined in the same direction and at the same angle along a peripheral direction. Since the adjacent bricks 8a are in a state of pressing each other, the separation and floatation of the bricks 8a due to the buoyancy and upward flow of the molten steel can be prevented or controlled. In addition, since mating faces 11 of the bricks 8a adjacent in the peripheral direction are not parallel with the flow direction of the molten metal, melting loss at the place of joints can be prevented.

5. 发明专利

JPH02274370A REFRACTORIES FOR VESSEL FOR PRETREATMENT OF MOLTEN IRON 失效
公开(公告)号：JPH02274370A
公开(公告)日：1990-11-08
申请号：JP9522689
申请日：1989-04-17
申请人： HARIMA CERAMIC CO LTD , NIPPON STEEL CORP
发明人： HANAGIRI SEIJI , ASO SEIJI , MIYAGAWA YOSHIKAZU , TSUCHINARI AKIHIRO , ITO TAKEYOSHI
IPC分类号： B22D41/02 , C04B35/04 , C04B35/043 , C04B35/10 , C04B35/103
摘要： PURPOSE:To provide the refractories which are highly resistant to corrosion and oxidation by using specific weight ratios of alumina, magnesia, carbon, silicon carbide and chromium oxide of specific grain sizes as the essential components of the refractories and drying the refractories after molding. CONSTITUTION:The compd. of the refractories for the vessel for the pretreatment of a molten iron is essentially composed of 20 to 80% alumina, 2 to 60% magnesia, 5 to 30% carbon, 5 to 15% silicon carbide and 0.5 to 5% chromium oxide of

6. 发明专利

JPH11147758A PRODUCTION OF REFRACTORY MATERIAL 失效
公开(公告)号：JPH11147758A
公开(公告)日：1999-06-02
申请号：JP31222697
申请日：1997-11-13
申请人： NIPPON STEEL CORP , HARIMA CERAMIC CO LTD
发明人： GOTO KIYOSHI , NAKAMURA HISASHI , TSUCHINARI AKIHIRO , KOUSHIYO MINORU
IPC分类号： C04B35/043 , C01G23/00 , C04B35/443 , C04B35/46 , C04B35/66
摘要： PROBLEM TO BE SOLVED: To obtain a refractory material with excellent resistance to corrosion and infiltration by mixing particles of magnesia source with respective particles of titania and alumina sources so that the weight ratio: TiO2 /(TiO2 +Al2 O3 ) comes to a specific value followed by either melting the mixture or baking it at a specific temperature or higher to form a MgAl2 O4 -Mg2 TiO4 -bassed solid solution. SOLUTION: First, a magnesia source such as granular magnesite with a size of =90 wt.%, a titania source such as granular anatase, and an alumina source such as granular aluminum hydroxide are mixed together in the weight ratio: TiO2 /(TiO2 +Al2 O3 ) of 0.1-0.9. Secondly, the mixture is either granulated or molded, and then either melted or baked at >=1,300 deg.C to form a MgAl2 O4 -Mg2 TiO4 -based solid solution. Thirdly, the solid solution is crushed and then incorporated with granular magnesia and a binder followed by carrying out a press molding and then baking the molded form at >=1,300 deg.C to obtain the objective shaped refractory material such as baked brick, alternatively, after molded, allowing the molded form to be dried to obtain the other objective prepared unshaped refractory material to be baked at high temperatures under service.

7. 发明专利

JPH10310816A IMMERSION TUBE 失效
公开(公告)号：JPH10310816A
公开(公告)日：1998-11-24
申请号：JP11726097
申请日：1997-05-07
申请人： NIPPON STEEL CORP , HARIMA CERAMIC CO LTD
发明人： TERAJIMA HIDETOSHI , GOTO KIYOSHI , AMANO MASAHIKO , TSUCHINARI AKIHIRO , FUJII TETSUO
IPC分类号： C21C7/10
摘要： PROBLEM TO BE SOLVED: To provide an immersion tube which restrains the development of crack on castable refractory and nitrogen pick-up becoming problem in RH, DH, CAS, etc., for iron and steel refining and also, can restrain the detached wearing of the castable refractory in removing slag caused by the invasion of metal. SOLUTION: In the immersion tube in secondary refining equipment for iron and steel refining, the high expansion castable refractory 1 having 0.5-5% residual expansion ratio at room temp., is arranged on the outer periphery of the immersion tube. Desirably, the refractory has 1.5-10% thermal expansion coefficient at the high temp. of >=1500 deg.C and contains Al2 O3 -MgO as base material and further, spinel and mullite.

8. 发明专利

JPH0967612A IMMERSION TUBE FOR MOLTEN STEEL TREATING APPARATUS 失效
公开(公告)号：JPH0967612A
公开(公告)日：1997-03-11
申请号：JP24511595
申请日：1995-08-31
申请人： HARIMA CERAMIC CO LTD , NIPPON STEEL CORP
发明人： AMANO MASAHIKO , YOSHIMURA YASUHIKO , TAGUCHI KUNIAKI , TSUCHINARI AKIHIRO , ITO HIDEO , TAKAGAKI HIROSHI
IPC分类号： C21C7/10
摘要： PROBLEM TO BE SOLVED: To prevent the sticking of slag on the outer periphery of an immersion tube and to improve the durability of the immersion tube by forming a slag line part in the outer peripheral refractory of a metal-made immersion tube for treating molten steel of a carbon- containing refractory. SOLUTION: The refractories 3, 4 are fitted to the inner peripheral surface and the outer side surface of a metal-made cylinder 1 having flange 2, of the immersion tube for circulating the molten steel arranged on the bottom part of a vacuum vessel in a vacuum degassing apparatus for molten steel to prevent the erosion of the metal-made cylinder caused by direct contact with the molten steel. Since the refractory 3 for the inner peripheral surface is brought into contact with only the molten steel and not brought into contact with molten slag, a structure of using the shaped refractory joined with monolithic refractory can be applied. Since the refractory for the outer side surface is brought into contact with the molten slag and the molten steel, and the molten slag is stuck to the outside of the immersion tube, and the outer diameter thereof is increased and thus trouble is brought for the molten steel refining, the slag line part and the upper part thereof are constituted by using the refractory bricks 5 different in length made of carbon-containing refractory hardly stuck with the molten slag. The outer part is lined with the monolithic refractory 6 of alumina quality, etc., and it is prevented that the immersion tube has a large diameter by stick-solidification of the molten slag on the outer periphery of the immersion tube.

9. 发明专利

JPH03193813A POROUS PLUG FOR BLOWING GAS 失效
公开(公告)号：JPH03193813A
公开(公告)日：1991-08-23
申请号：JP33285689
申请日：1989-12-25
申请人： HARIMA CERAMIC CO LTD , NIPPON STEEL CORP
发明人： ASO SEIJI , HARADA TOMIO , KOMIYA TOSHIAKI , TSUCHINARI AKIHIRO , SHIMOBAYASHI OSAMU , TAJI TAKASHI
IPC分类号： C04B35/043 , C04B35/04 , C04B35/10 , C04B35/103 , C04B35/44 , C04B35/443 , C21C5/48 , C21C7/072
摘要： PURPOSE:To improve erosion resistance and spalling resistance and to make effect of prevention to gas leakage much by using carbon-containing refractory as the outer circumferential refractory and arranging porous quality refractory in the inner part thereof. CONSTITUTION:The burnt or non-burned carbon-containing refractory of blended material containing 1-40wt.% carbon can the balance refractory aggregate as the essential material is used for the outer circumferential refractory 2. In the inner part thereof, gas permeable porous refractory 1 is arranged to form a porous plug for blowing gas. The porous refractory 1 is desirable to use alumina-base burnt product having corrosion resistance in common with spalling resistance. It is desirable to insert mortar between both refractories 1, 2. Side face and rear face of porous plug are covered with metal case 3 and a gas introducing tube 4 is connected to the rear face of metal case 3.

10. 发明专利

JPH0354155A PRODUCTION OF GRAPHITE-CONTAINING BRICK FOR LINING OF MELTED METALLIC VESSEL 失效
公开(公告)号：JPH0354155A
公开(公告)日：1991-03-08
申请号：JP18878689
申请日：1989-07-24
申请人： HARIMA CERAMIC CO LTD , NIPPON STEEL CORP
发明人： ASO SEIJI , HARADA SHIGEMI , TSUCHINARI AKIHIRO , ITO TAKEYOSHI
IPC分类号： C04B35/00 , C04B35/04 , C04B35/043 , C04B35/10 , C04B35/103
摘要： PURPOSE:To provide brick having low heat conductivity and enhance corrosion resistance and spalling resistance by blending a blend consisting scale like graphite used as a carbon material and residual amount of fire resistant aggregate with fine material lost by heating at a specific amount and kneading, forming and drying the blend. CONSTITUTION:1.0-10wt.% fine material lost by heating is added to a 100wt.% blend consisting essentially of 3-20wt.% scale like graphite used as a carbon material and 97-80wt.% fire resistant aggregate and the resultant blend is kneaded, formed and dried. When the fine material lost by heating is added to the blend consisting essentially of 3-20wt.% scale like carbon powder and

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