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71. 发明专利

JPH05294714A 失效
公开(公告)号：JPH05294714A
公开(公告)日：1993-11-09
申请号：JP9565892
申请日：1992-04-15
申请人： KUROSAKI REFRACTORIES CO , NIPPON STEEL CORP
发明人： TAMAKI TAKEYUKI , KAJI NOBUHIKO , SATO TAKAYOSHI , GOTO KIYOSHI
IPC分类号： B22D41/02 , C04B35/04 , C04B35/043
摘要： PURPOSE:To obtain a fired basic refractory used for high durable lining material which suppresses stripping damage caused by thermal shock in a kiln large in temp. fluctuation at the time of steel making and refining and is excellent in spalling resistance and slag infiltration resistance durable against the agitation of a molten steel, flux refining or the like at the time of a gas injection type refining. CONSTITUTION:The high temp strength and wear resistance of a magnesia- zirconia brick is improved to the level of a magnesite-chrom brick by making the fired basic refractory which consists of 1-10wt.% zircon, 2-15wt.% zirconia, 5-35wt.% spinel selected in the particle diameter region of 10-35wt.% in 0.5-10mm preferably 0.5mm region and of 5-30wt.% in 10mm region and balance magnesia to increase the bonding among magnesia particles by zirconia.

72. 发明专利

JPH04318113A REFRACTORY LINING FOR FURNACE 失效
公开(公告)号：JPH04318113A
公开(公告)日：1992-11-09
申请号：JP11069891
申请日：1991-04-17
申请人： NIPPON STEEL CORP
发明人： ASANO KEISUKE , OKAWA KIYOSHI , GOTO KIYOSHI , SAKAMOTO HIROSHI , SAITO MASAO , AOYANAGI SUSUMU , KASAHARA HAJIME
IPC分类号： C04B35/043 , C04B35/04 , C21C5/44 , F27D1/00
摘要： PURPOSE:To stabilize furnace operation and to reduce unit consumption of furnace refractory by stably extending service life of lining in the case of lining magnesia-carbon based bricks in the furnace, in which a large quantity of gas, etc., is blown from the bottom. CONSTITUTION:As the refractory lining furnace, in which the gas, etc., of quantity corresponding to >=20Nm /H per ton of molten iron or molten steel in the whole quantity for blowing the gas, etc., from the furnace bottom, the magnesia-carbon based brick having elasticity and 100kg/cm bending strength at 1400 deg.C, is used.

73. 发明专利

JPH0480315A OPERATION OF REFINING TREATMENT WITH FURNACE OR VESSEL FOR EXECUTING OXYGEN TOP BLOWING 失效
公开(公告)号：JPH0480315A
公开(公告)日：1992-03-13
申请号：JP19056890
申请日：1990-07-20
申请人： NIPPON STEEL CORP
发明人： GOTO KIYOSHI , ASANO KEISUKE , OTSUKI YUZO , SHIMAO TERUO
IPC分类号： C21C7/072 , C21C5/32 , C21C7/00 , C21C7/068 , C21C7/10
摘要： PURPOSE:To restrain wearing of a refractory by quantitatively analyzing and evaluating relation between operating condition and the wearing of lining refractory for refractory wall and utilizing this for design of a furnace or an equipment and the operation. CONSTITUTION:In refining (treatment) operation of top-blowing oxygen from a lance on molten metal surface, radius R of firing point in contact with the oxygen is smaller than distance P between the refractory wall surface of furnace or vessel and this firing point center. Further, oxygen supplying rate, position of a lance 4, inner diameter of the lance 4, inner diameter of the refractory wall surface of furnace or vessel, etc., are regulated so that [(the oxygen supplying rate (m /h) X the radius of firing point (m)) / area of the firing point (m )] is smaller than [2,500 X the distance between the refractory wall surface and this firing point center (m)]. By suitably adjusting the oxygen supplying rate, the radius of firing point and the area of firing point, the wearing of furnace wall refractory can be effectively restrained and the unit consumption of refractory, maintenance cost and equipment working rate can be improved.

74. 发明专利

JPH03232761A MAGNESIA-CONTAINING REFRACTORY MATERIAL, PRODUCTION THEREOF AND REFRACTORY 失效
公开(公告)号：JPH03232761A
公开(公告)日：1991-10-16
申请号：JP2843790
申请日：1990-02-09
申请人： NIPPON STEEL CORP , KUROSAKI REFRACTORIES CO
发明人： GOTO KIYOSHI , ASANO KEISUKE , OTSUKI YUZO , OKAWA KIYOSHI , TAMAKI TAKEYUKI , YAMAMOTO HIROSHI
IPC分类号： C04B35/043 , C04B35/00 , C04B35/03
摘要： PURPOSE:To improve durability by melting magnesia and zircon, removing segregated and aggregated forsterite and pulverizing. CONSTITUTION:>=30wt.% magnesia having =95% purity is blended with >=70wt.% zircon, removing having =90% purity is melted in a melting furnace such as electric furnace and zircon is decomposed to form zirconia and silica. This silica is reacted with part of magnesia to segregate and aggregate forsterite. Then in a molten state or after aggregation, forsterite in the central part is removed and a refractory aggregate comprising magnesia, zirconia and a small amount of forsterite is pulverized.

75. 发明专利

JPH0375275A MAGNESIAN REFRACTORY MORTAR 失效
公开(公告)号：JPH0375275A
公开(公告)日：1991-03-29
申请号：JP20858189
申请日：1989-08-11
申请人： NIPPON STEEL CORP , KUROSAKI REFRACTORIES CO
发明人： GOTO KIYOSHI , AIBE HISAO
IPC分类号： C04B35/66
摘要： PURPOSE:To density an executing texture and improve corrosion resistance containing Mg(OH)2 powder having fixed particle diameter and a residual magnesia and a binder. CONSTITUTION:0.5-50wt.% Mg(OH)2 powder having =90% purity is mixed with a residual part of magnesia such as a natural magnesia and a binder such as an organic paste to obtain a mixed composition. Then, said composition is burnt to produce a magnesian refractory mortar.

76. 发明专利

JPH0375265A MAGNESIA-CONTAINING REFRACTORY 失效
公开(公告)号：JPH0375265A
公开(公告)日：1991-03-29
申请号：JP21073889
申请日：1989-08-17
申请人： NIPPON STEEL CORP
发明人： GOTO KIYOSHI
IPC分类号： C04B35/043 , C04B35/04
摘要： PURPOSE:To promote a sintering of magnesia-containing refractory and density the refractory by adding La2O3 or Y2O3 to a specific refractory containing magnesia and chrome. CONSTITUTION:The aimed refractory obtained by adding 0.1-30wt.% La2O and/or Y2O to a mixture of one or two or more kind of refractories containing magnesia and chrome such as magnesia and electromelting magnesite-chrome, spinel and chromate or a mixture of one or two or more kind of refractories containing magnesia and chrome such as electromelting magnesite-chrome or one or two or more kind of refractories containing magnesia and chrome such as electromelting magnesite-chrome, spinel and chrome. When amounts of La2O and Y2O3 added are

77. 发明专利

JPH0375264A BASIC REFRACTORY 失效
公开(公告)号：JPH0375264A
公开(公告)日：1991-03-29
申请号：JP21073789
申请日：1989-08-17
申请人： NIPPON STEEL CORP
发明人： GOTO KIYOSHI
IPC分类号： C04B35/043 , C04B35/04
摘要： PURPOSE:To improve occurrence of cracking of refractory during execution of work or production by blending specific refractory containing magnesia and chromium with a specific amount of binder and magnesium hydroxide powder. CONSTITUTION:Magnesia is blended with one or more of and electrofused magnesium and chromium, spinel and chromium ore or blended with one or more of and electrofused magnesium and chromium, spinel and chromium ore to give refractory containing magnesia and chromium and the blend of the refractory is further mixed with a small amount of binder and magnesium hydroxide powder having

78. 发明专利

JPH0331691A INDUCTION SMELTING FURNACE 失效
公开(公告)号：JPH0331691A
公开(公告)日：1991-02-12
申请号：JP16365289
申请日：1989-06-28
申请人： NIPPON STEEL CORP
发明人： MORIMOTO YUKIO , NAKANE HIROFUMI , GOTO KIYOSHI
IPC分类号： B22D41/02 , F27B14/06 , F27D1/00 , F27D11/06
摘要： PURPOSE:To permit the desulfurizing as well as the deoxidizing of molten steel by employing flux and prevent the damage of an induction coil due to thermal expansion by a method wherein a furnace wall is constituted of a magnesia-chrome refractory layer, a ramming layer, a compressible material layer and a coil cement layer, which are arranged sequentially from the inner surface toward the outer surface of the furnace. CONSTITUTION:The inner surface of a furnace wall, contacted with molten steel 1 or flux 2, is formed of a magnesia-chrome refractories layer and a ramming layer 4 is arranged at the outside of the Mg-Cr refractories layer 3 while a compressible material layer 5 is arranged at the outside of the ramming layer 4 and a coil cement layer 6 is arranged at the outside of the compressible material layer 5. Induction coils 8 are arranged around the outer periphery of the coil cement layer 6. The magnesia-chrome refractories layer 3, the ramming layer 4 and the compressible material layer 5 are arranged sequentially to combine and form the wall whereby a furnace wall, hardly molten by flux and having compressibility, may be obtained. In this induction smelting furnace, even when the magnesia-chrome refractories layer is deformed due to thermal expansion and the like, the stress of the deformation is transferred to the coil cement layer or the induction coils after mitigating it sufficiently thereby preventing the damage of the induction coils.

79. 发明专利

JP2010091297A Method for measuring modulus of elasticity of refractory and method for selecting refractory 有权
$Method for measuring modulus of elasticity of refractory and method for selecting refractory$
标题翻译：测量耐火弹性模量的方法和选择耐火材料的方法
公开(公告)号：JP2010091297A
公开(公告)日：2010-04-22
申请号：JP2008258861
申请日：2008-10-03
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TAMURA YOSHIHIRO , GOTO KIYOSHI
IPC分类号： G01N3/18
摘要： PROBLEM TO BE SOLVED: To furthermore enhance the precision of the modulus of elasticity during the heating of refractory than before and to select the more proper refractory when the refractory is adapted to an actual furnace in a method of measuring the modulus of elasticity of the refractory during heating and a method for selecting the refractory using the measuring method. SOLUTION: In the method of measuring the modulus of elasticity of the refractory for measuring the modulus of elasticity of the refractory by compressing the refractory as a sample, the modulus of elasticity of the refractory is measured at a temperature selected from a temperature range of 800-1,400°C and at a straining rate selected from a straining rate range of 1.0×10 -6 to 1.0×10 -2 [-/sec] at the time of compression of the sample. Further, the modulus of elasticity thus measured is used to select the refractory as one adapted to the actual furnace. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：为了进一步提高耐火材料加热期间的弹性模量的精度，并且在测量弹性模量的方法中，当耐火材料适用于实际的炉时，选择更适当的耐火材料的加热中的耐火材料和使用该测量方法选择耐火材料的方法。解决方案：在通过压缩作为样品的耐火材料来测量耐火材料的弹性模量的耐火材料弹性模量的方法中，耐火材料的弹性模量在选自温度范围为800-1,400℃，并且以从1.0×10 -6 的应变速率范围选择到1.0×10 -2 [ - / sec]的应变速率在样品的压缩时间。此外，由此测量的弹性模量用于选择适合于实际炉的耐火材料。版权所有（C）2010，JPO＆INPIT

80. 发明专利

JP2008173861A Kneader for refractory material and method of kneading refractory material 有权
$Kneader for refractory material and method of kneading refractory material$
标题翻译：耐火材料的制造商和烧结材料的方法
公开(公告)号：JP2008173861A
公开(公告)日：2008-07-31
申请号：JP2007009559
申请日：2007-01-18
申请人： Nippon Steel Corp , Taiheiyo Kiko Kk , 大平洋機工株式会社 , 新日本製鐵株式会社
发明人： GOTO KIYOSHI , UCHIDA TAKAYUKI , INUZUKA TAKAYUKI , NOGUCHI TORU , ASAMI KAZUHIRO
IPC分类号： B28C5/16 , B01F7/16 , B01F7/18 , C04B35/657
摘要： PROBLEM TO BE SOLVED: To provide a reverse-conical kneader which gives, with a small amount of kneading solution, a kneaded product having high fluidity even from a monolithic refractory containing a specified amount of ultra-fine powder of particle sizes of ≤10 μm, causes no co-rotation of the refractory because of the simple structure of the body exerting high durability and can thereby prevent a stay of the kneaded product and a method of kneading a refractory. SOLUTION: The kneader has a container 4 having a truncated reverse-conical lower part, an inside stirrer 1 rotating on the vertical axis at the center of the container 4 and outside stirrers 2a, 2b, 2c and 2d revolving coaxially with the inside stirrer 1 along the inside wall of the container 4. The support members 3a and 3b for supporting the outside stirrers 2a and 2b, respectively has stirring auxiliary members 14a and 14b so as to move the refractory staying between the inside stirrer 1 and the outside stirrers 2a, 2b, 2c and 2d. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种反向锥形捏合机，其用少量捏合溶液提供具有高流动性的捏合产物，甚至从含有特定量的粒度为超细粉末的特定量的超细粉末的整体耐火材料 ≤10μm时，由于身体的结构简单，耐久性高，难以共同旋转，能够防止混炼物的停留和捏合方法。解决方案：捏合机具有容器4，该容器4具有截头倒锥形下部，内部搅拌器1在容器4的中心的纵轴上旋转，外部搅拌器2a，2b，2c和2d与内部搅拌器1沿着容器4的内壁。用于支撑外部搅拌器2a和2b的支撑部件3a和3b分别具有搅拌辅助部件14a和14b，以使耐火材料停留在内侧搅拌器1和外部搅拌器2a，2b，2c和2d。版权所有（C）2008，JPO＆INPIT

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