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1. 发明专利

JPH07165461A BAKED MAGNESIA-CHROMIUM BRICK AND ITS PRODUCTION 失效
公开(公告)号：JPH07165461A
公开(公告)日：1995-06-27
申请号：JP34209593
申请日：1993-12-14
申请人： HARIMA CERAMIC CO LTD , NIPPON STEEL CORP
发明人： KITAI TSUNEO , OSAKI HIROSUKE , YAMAMOTO TETSUO
IPC分类号： C04B35/047 , C04B35/12 , F27D1/00
摘要： PURPOSE:To obtain a baked magnesia-chromium brick having excellent corrosion resistance and slag infiltration resistance and to provide a process for the production of the brick. CONSTITUTION:This baked magnesia-chromium brick contains fine metal particles dispersed in a refractory texture and is obtained by forming a composition composed mainly of 5-70wt.% of chromite and the remaining part of magnesia raw material and baking in a non-oxidizing atmosphere at a high temperature. The baked magnesia-chromium brick contains fine metal particles dispersed in the refractory texture in non-oxidized state and, accordingly, reaction of the fine metal particles with MgO component of the magnesia raw material takes place during use to form a spinel represented by picrochromite. The brick has excellent corrosion resistance and slag infiltration resistance owing to the high melting point, low thermal expansion coefficient, etc., of the spinel.

2. 发明专利

JPH08283074A REFRACTORY MORTAR USED TO LINING BRICK FOR MOLTEN METAL CONTAINER AND USE THEREOF 失效
公开(公告)号：JPH08283074A
公开(公告)日：1996-10-29
申请号：JP11259995
申请日：1995-04-14
申请人： NIPPON STEEL CORP , HARIMA CERAMIC CO LTD
发明人： OSHIMA AKIHIRO , TAMURA SHINICHI , KASAHARA HAJIME , OSAKI HIROSUKE , KOUSHIYO MINORU , TAKAGAKI HIROSHI
IPC分类号： B22D41/02 , C04B35/66
摘要： PURPOSE: To obtain refractory mortar superior in corrosion resistance and restraining advance erosion of a brick joint part. CONSTITUTION: Refractory clay of 0.5-10 pts.wt. are compounded with refractory aggregate consisting of 75-95 pts.wt. magnesia having

3. 发明专利

JP2000001364A REFRACTORY LINING 失效
公开(公告)号：JP2000001364A
公开(公告)日：2000-01-07
申请号：JP17530998
申请日：1998-06-09
申请人： NIPPON STEEL CORP , HARIMA CERAMIC CO LTD
发明人： GOTO KIYOSHI , NAKAMURA HISASHI , MAEKAWA AKIYOSHI , OSAKI HIROSUKE
IPC分类号： C04B35/043 , F27D1/00
摘要： PROBLEM TO BE SOLVED: To obtain a refractory lining comprising a magnesia-carbon brick, usable in secondary refining facilities in a steel manufacturing process and less liable to cause erosion even if the lining is used when oxygen is blown on the surface of molten steel at a high flow rate in a relatively narrow tank such as CAS or RH. SOLUTION: This refractory lining comprises a magnesia carbon brick contg. 5-15 wt.% graphite, 0-5 wt.% non-crystalline carbon powder and 1-4 wt.% one or more selected from metal Al, Si and Al-Si. The proportion of the Si component in all the metal components is

4. 发明专利

JP2000001363A REFRACTORY LINING 失效
公开(公告)号：JP2000001363A
公开(公告)日：2000-01-07
申请号：JP17530898
申请日：1998-06-09
申请人： NIPPON STEEL CORP , HARIMA CERAMIC CO LTD
发明人： GOTO KIYOSHI , NAKAMURA HISASHI , MAEKAWA AKIYOSHI , OSAKI HIROSUKE
IPC分类号： C04B35/043 , F27D1/00
摘要： PROBLEM TO BE SOLVED: To obtain a refractory lining having a reduced wear rate and a prolonged service life as compared with a conventional magnesia-chrome brick as a refractory lining used in a furnace for steel refining, in particular refining facilities for vacuum-treating molten steel. SOLUTION: The refractory lining comprises a magnesia-carbon brick contg. 3-7 wt.% flake graphite, 1-4 wt.% non-crystalline carbon powder and 1-5 wt.% one or more selected from metal Al, Si and Al-Si. The max. grain diameter of magnesia is preferably

5. 发明专利

JPS6374956A MAGNESIA-CARBON BASE NON BURNT BRICK FOR VACUUM DEGASIFICATION VESSEL 失效
公开(公告)号：JPS6374956A
公开(公告)日：1988-04-05
申请号：JP21883186
申请日：1986-09-16
申请人： NIPPON STEEL CORP , HARIMA CERAMIC CO LTD
发明人： ASO SEIJI , YAOI HIDEO , UTO SHIGETOSHI , ISOBE TOSHIHIRO , OSAKI HIROSUKE
IPC分类号： C04B35/043 , C04B35/04

6. 发明专利

JPH0826818A MAGNESIA-CHROME-BASED BRICK 失效
公开(公告)号：JPH0826818A
公开(公告)日：1996-01-30
申请号：JP27488293
申请日：1993-10-05
申请人： HARIMA CERAMIC CO LTD
发明人： TSUCHINARI AKIHIRO , OSAKI HIROSUKE , YAMAMOTO TETSUO
IPC分类号： C04B35/047
摘要： PURPOSE:To produce a magnesia-chrome-based brick excellent in corrosion resistance. CONSTITUTION:This magnesia-chrome-based brick comprises a blending composition of 10-80wt.% sintered magnesia-chrome clinker using 0.1-5mm grain size thereof and the remainder consisting essentially of one or more of a magnesia- based raw material, a chromium ore and chromium oxide.

7. 发明专利

JPH07216436A IMMERSION TUBE FOR MOLTEN STEEL TREATMENT DEVICE 失效
公开(公告)号：JPH07216436A
公开(公告)日：1995-08-15
申请号：JP2588194
申请日：1994-01-31
申请人： HARIMA CERAMIC CO LTD , SUMITOMO METAL IND
发明人： TSUCHINARI AKIHIRO , YANO KAZUYUKI , KATO YOSHIKAZU , OSAKI HIROSUKE , YAMAMOTO TETSUO , KUWABARA AKIO , KIGUCHI HIROSHI , UCHIDA MASAHIKO
IPC分类号： F27D3/15 , C21C7/10
摘要： PURPOSE:To provide an immersion tube of molten steel treatment device which prevents sticking of slag and is excellent in durability. CONSTITUTION:In an immersion tube in which the outer/inner circumference parts of a metal cylinder 1 are respectively constituted of refractories 2, 3, this immersion tube for molten steel treatment device is obtained by embedding an annular porous refractory 4 in a slag line part of the outer circumference part. By embedding a porous refractory in the slag line part of outer circumference and by blowing an inert gas through a gas introducing pipe, the immersion tube is formed with a gas film between slag and porous refractory. As a result, the rewardable effect on preventing slag sticking as well as excellent durability is obtained.

8. 发明专利

JPH04187560A MAGNETIC REFRACTORY BRICK 失效
公开(公告)号：JPH04187560A
公开(公告)日：1992-07-06
申请号：JP31868290
申请日：1990-11-21
申请人： HARIMA CERAMIC CO LTD
发明人： KITAI TSUNEO , OSAKI HIROSUKE
IPC分类号： C04B35/043 , C04B35/04 , C04B35/047
摘要： PURPOSE:To improve spalling resistance of the subject brick by compounding a chromium ore to a magnesia clinker composed mainly of MgO, Al2O3 and optionally SiO2 and containing each specific phase of the above component in the grain boundary of MgO. CONSTITUTION:An MgO raw material is mixed with an Al2O3 raw material or an MgO raw material is mixed with an Al2O3 raw material and an SiO2 raw material. The mixture is calcined at >=1500 deg.C to obtain a magnesia clinker containing MgO and Al2O3 or MgO, Al2O3 and SiO2 as main constituent components and containing spinel phase or spinel phase and forsterite phase of the above main constituent components in the grain boundary of MgO. An MgO-based refractory brick having excellent spalling resistance and corrosion resistance is produced by compounding 100 pts.wt. of the magnesia clinker with 20-150 pts.wt. of a chromium ore or 1-10 pts.wt. of Cr2O3 and a binder such as phenolic resin, kneading the mixture, forming and drying the kneaded material and baking the dried article at >=1750 deg.C.

9. 发明专利

JPH03232763A MAGNESIA-CHROMIUM REFRACTORY BRICK 失效
公开(公告)号：JPH03232763A
公开(公告)日：1991-10-16
申请号：JP3114890
申请日：1990-02-08
申请人： HARIMA CERAMIC CO LTD
发明人： KITAI TSUNEO , OSAKI HIROSUKE , NISHIWAKI HITOSHI
IPC分类号： C04B35/047 , C04B35/04
摘要： PURPOSE:To improve corrosion resistance, structural spalling resistant and thermal spalling resistance, comprising a magnesia refractory material, a chromium refractory material and carbonate powder. CONSTITUTION:(A) Magnesia having >=99% MaO content or a magnesia refractory material comprising magnesia as a main composition component is blended with (B) a chromium refractory material comprising chromium as a main composition component, (C) 1-10wt.% outer percentage based on 100wt.% total of the component A and the component B of carbonate powder (e.g. calcite) having 0.1-2.0mm particle diameter and optionally (D) 1-20wt.% outer percentage Cr2O3 powder and/or Al2O3 powder and molded.

10. 发明专利

JPH08208316A MAGNESIA-CHROME FIRED BRICK 失效
公开(公告)号：JPH08208316A
公开(公告)日：1996-08-13
申请号：JP18404894
申请日：1994-07-12
申请人： HARIMA CERAMIC CO LTD
发明人： TSUCHINARI AKIHIRO , OSAKI HIROSUKE , YAMAMOTO TETSUO
IPC分类号： C04B35/047
摘要： PURPOSE: To obtain a magnesia-chrome fired brick excellent in resistance to corrosion and the penetration of slag. CONSTITUTION: A blend consisting of 5-80wt.% electromelted magnesia having grain boundaries of 5-50μm width in the particles and the balance essentially magnesian stock and chromite is sintered to obtain the objective magnesia- chrome fired brick.

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