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1. 发明专利

JP2000327407A HIGH SPALLING RESISTANT CHROMIA-CONTAINING BRICK AND MOLTEN METAL VESSEL 失效
公开(公告)号：JP2000327407A
公开(公告)日：2000-11-28
申请号：JP13060599
申请日：1999-05-11
申请人： NIPPON STEEL CORP , KYUSHU REFRACTORIES
发明人： SAITO YOSHITOSHI , KONO KOJI , KASAHARA HAJIME , NONOBE KAZUO , YAMASHITA ICHIRO , TSUBOI SATOSHI
IPC分类号： B22D41/02 , C04B35/12 , C21C5/44 , C21C7/00 , C21C7/10 , F27D1/04
摘要： PROBLEM TO BE SOLVED: To improve hot spalling resistance and to particularly improve the corrosion resistance of an alumina-chromia brick to slag in a chramia-containing brick using a molten metal vessel such as a hot metal vessel, a molten steel vessel, a degassing vessel or the like. SOLUTION: Mullite is used as a coarse particle part and/or a middle particle part and the quantity is suitably 5-25 wt.% Chromium oxide and if necessary, an alumina-chromia solid solution are added as the chromia raw material in the alumina-chromia brick. An alumina raw material containing >=90 wt.% Al2O3 is used.

2. 发明专利

JPH08290960A REFRACTORY CONTAINING CARBON 失效
公开(公告)号：JPH08290960A
公开(公告)日：1996-11-05
申请号：JP9384595
申请日：1995-04-19
申请人： KYUSHU REFRACTORIES , NIPPON STEEL CORP
发明人： MATSUI TAKESHI , MIKAMI YORIYOSHI , NONOBE KAZUO , YASUI HIROSHI
IPC分类号： C04B35/00 , C04B35/043 , C04B35/63 , C04B35/632
摘要： PURPOSE: To obtain a refractory containing carbon capable of remarkably improving heat resistant spalling properties of the refractory containing carbon used for the vessels of various molten metals, also improving oxidation resistance and corrosion resistance to prolong the life of the vessels of various molten metals to a large extent. CONSTITUTION: This refractory containing carbon is obtained by adding 0.5-10 pts.wt. one kind or more selected from a single powder, a blended powder or an alloy powder of aluminum, magnesium and silicon and 1-8 pts.wt. heat curing boron modified phenolic resin as a binder to 100 pts.wt. blended material containing 3-30wt.% carbon raw material and the rest of a basic refractory material.

3. 发明专利

JP2000327406A CHROMIA-CONTAINING BRICK EXCELLENT IN SLAG INFILTRATION RESISTANCE, AND MOLTEN METAL VESSEL 失效
公开(公告)号：JP2000327406A
公开(公告)日：2000-11-28
申请号：JP13060499
申请日：1999-05-11
申请人： NIPPON STEEL CORP , KYUSHU REFRACTORIES
发明人： SAITO YOSHITOSHI , KONO KOJI , KASAHARA HAJIME , NONOBE KAZUO , YAMASHITA ICHIRO , TSUBOI SATOSHI
IPC分类号： B22D41/02 , C04B35/12 , C21C7/10 , F27D1/00
摘要： PROBLEM TO BE SOLVED: To improve slag infiltration resistance and to particularly improve the corrosion resistance of an alumina-chromia brick to slag in a chramia- containing brick used for a molten metal vessel such as a hot metal vessel, a molten steel vessel, a degassing vessel or the like. SOLUTION: Metal Si is added into the chromia-containing brick. The quantity to be added is suitably 0.2-10 pts.wt. per 100 pts.wt. refractory material containing chromia. Chromium oxide and if necessary, an alumina-chromia solid solution are added as the chromia raw material in the alumina-chramia brick. An alumina raw material containing >=90 wt.% Al2O3 is used.

4. 发明专利

JPH09295859A CARBON-COMBINED BRICK EXCELLENT IN RESISTANCE TO SPALLING 失效
公开(公告)号：JPH09295859A
公开(公告)日：1997-11-18
申请号：JP13112796
申请日：1996-04-26
申请人： KYUSHU REFRACTORIES , NIPPON STEEL CORP
发明人： YAMADA JUNJI , TAJIMA KAZUTOYO , MATSUO SABURO , NONOBE KAZUO , YAMASHITA ICHIRO
IPC分类号： C04B35/632 , C04B35/043
摘要： PROBLEM TO BE SOLVED: To provide a brick satisfactorily usable even as a carbon-combined brick especially in a low carbon region by improving resistance to spalling without losing corrosion resistance of a carbon-combined brick. SOLUTION: This carbon-combined brick contains 0.5-10 pts.wt. of pitch containing 65-90wt.% of fixed carbon and having a 150-350 deg.C softening point and 0.5-10 pts.wt. of a powdery thermosetting phenolic resin having >=2,000 weight-average molecular weight based on 100 pts.wt. of a composition comprising 70-97 pts.wt. of a basic refractory material mainly composed of magnesia and 3-30 pts.wt. of a carbonaceous material.

5. 发明专利

JPH0748168A REFRACTORY FOR PRELIMINARILY TREATING MOLTEN PIG-IRON 失效
公开(公告)号：JPH0748168A
公开(公告)日：1995-02-21
申请号：JP21487293
申请日：1993-08-06
申请人： KYUSHU REFRACTORIES , NIPPON STEEL CORP
发明人： KONO KOJI , YAMADA JUNJI , TAKAHASHI HIROKUNI , NONOBE KAZUO , HAYASHI SATOSHI
IPC分类号： C04B35/043 , C21C1/06
摘要： PURPOSE:To obtain a refractory for preliminarily treating molten pig-iron having excellent melting loss resistance and spalling resistance, standing use of an ultra-high temperature in the vicinity of a pig-iron receiving port close to an air or oxygen lance of a mixer car by blending a magnesia raw material or magnesia.calcia raw material (hereinafter abbreviated as magnesia raw material) with silicon carbide and a carbon material in a specific ratio. CONSTITUTION:60-95wt.% of magnesia raw material is blended with 3-30wt.% of silicon carbide and 2-30wt.% of a carbon material, kneaded and molded by a friction press, etc. The molded material is heat-treated at about 300 deg.C for about 10 hours to give an unburned refractory. For example, fused magnesia clinker is used as the magnesia raw material and magnesia clinker as the magnesia.calcia raw material. The carbon material contributes to corrosion resistance and spalling resistance by hardly wetting slag and, for example, both graphite and pitch are used. Silicon carbide has effects of suppressing oxidation of the carbon material, especially oxidation at an ultra-high temperature under exposure to an oxygen gas and exhibiting high corrosion resistance and high spalling resistance of the carbon material.

6. 发明专利

JPH0717758A MAGNESIA-CARBON BRICK FOR INNER LINING OF VESSEL FOR MOLTEN METAL 失效
公开(公告)号：JPH0717758A
公开(公告)日：1995-01-20
申请号：JP14645193
申请日：1993-06-17
申请人： KYUSHU REFRACTORIES , NIPPON STEEL CORP
发明人： SATO TAKAYOSHI , MATSUKI YOSHIMASA , OKUYAMA NOBORU , TAKAHASHI HIROKUNI , NONOBE KAZUO , UCHIDA MINEO
IPC分类号： C04B35/043 , F27D1/04
摘要： PURPOSE:To reduce the wear of a joint part when the joint part of the brick is opened in the vessel for molten metal and to prevent the brick from becoming barrel-like and to prevent the wear by spalling. by making the grain size construction in which the particulates of magnesia clinker is lessend than uaual in the magnesia.carbon brick. CONSTITUTION:In the magnesia.carbon brick containing 70-95wt.% magnesia clinker and 5-30wt.% graphite material, the grain size construction is in the region ABC which is surrounded by the three point of A (67, 30, 3), B (45, 30, 25) and C (45, 52, 3) by wt.% in the triangular diagram XYZ whose three vertexes are the coarse grain (X) having >=1mm grain size, the middle grain (Y) having 1-0.125mm grain size and particulate (Z) having

7. 发明专利

JPH07267719A ALUMINA-MAGNESIA-CARBON BRICK 失效
公开(公告)号：JPH07267719A
公开(公告)日：1995-10-17
申请号：JP5729194
申请日：1994-03-28
申请人： KYUSHU REFRACTORIES , NIPPON STEEL CORP
发明人： ASO SEIJI , MIYAGAWA YOSHIKAZU , KUROTSUCHI YUUICHI , TAKAHASHI HIROKUNI , NONOBE KAZUO , YASUI HIROSHI
IPC分类号： C04B35/628 , C04B35/043 , C04B35/103
摘要： PURPOSE:To obtain an alumina-magnesia-carbon brick inhibiting the occurrence of thermal stress while preventing the expansion of a joint in the case of conventional alumina-silicon carbide-carbonaceous refractories and maintaining the effect over a long period of time. CONSTITUTION:When an alumina-magnesia-carbon brick is composed of 3-94wt.% aluminous refractory material, 3-94wt.% magnesian refractory material and 3-30wt.% carbonaceous material, coarse magnesia particles surface-coated with a carbonaceous material are used as all or part of the magnesian refractory material and the carbonaceous material. The objective alumina-magnesia- carbon brick is obtd.

8. 发明专利

JPH05330904A HIGHLY SPALLING-RESISTANT MAGNESIA CARBON BRICK 失效
公开(公告)号：JPH05330904A
公开(公告)日：1993-12-14
申请号：JP14262192
申请日：1992-06-03
申请人： KYUSHU REFRACTORIES , NIPPON STEEL CORP
发明人： NOMURA MITSUO , SATO TAKAYOSHI , KATAOKA KOUICHIROU , TAKAHASHI HIROKUNI , NONOBE KAZUO , UCHIDA MINEO
IPC分类号： B22D41/02 , C04B35/04 , C04B35/043 , C21C5/44 , C21C7/00
摘要： PURPOSE:To develop refractory brick excellent in spalling resistance by adding a binder to a mixture of a magnesia-based refractory with a graphitic material to some extent, forming and burning the resultant mixture. CONSTITUTION:An MgO-based refractory in an amount of 60-97wt.% is mixed with 3-40wt.% coarse granular graphitic material having >=0.2mm average grain diameter. Metallic powder such as an Al allay, as necessary, is suitably added thereto and a carbonaceous binder such as phenolic resin, pitch or tar is added to the obtained mixed material. The prepared mixture is kneaded, formed into the shape of brick and heat-treated to afford unburnt brick or burned at a high temperature to provide refractory brick. Thereby, the objective MgO-C-based refractory brick excellent in spalling resistance is obtained.

9. 发明专利

JPH05209213A METHOD FOR REPAIRING BOTTOM-BLOWING TUYERE 失效
公开(公告)号：JPH05209213A
公开(公告)日：1993-08-20
申请号：JP5829591
申请日：1991-02-27
申请人： KYUSHU REFRACTORIES , NIPPON STEEL CORP
发明人： YAMASHITA KOSUKE , TAKEUCHI MASANORI , GOTO TOMINARI , WATANABE AKIRA , NONOBE KAZUO , MIZUTA YASUTOSHI
IPC分类号： C21C5/48 , F27D1/16
摘要： PURPOSE:To provide a repairing method of a tuyere, by which the exchanging time is shortened and the wear of the tuyere is restrained, as well in the exchanging repair of the tuyere in a bottom blowing converter. CONSTITUTION:In the repairing method of the tuyere in a top-bottom combined blowing converter or the bottom blowing converter, a tuyere brick 1 is left into the furnace bottom, and a worn gas blowing pipe 2 is pulled out, and the new gas glowing pipe 2 is inserted and successively, on this circumference, repairing material 4 adding a liquid phenol resin incorporating a thermosetting resin component to a refractory material mainly incorporating MgO is charged. By this method, since only the gas blowing pipe 2 is exchanged, the exchanging time is drastically shortened and, at the same time, since the repairing material 4 is slurry state, the fluidity is improved and the uniform working body is obtd. and the durability after repairing is further improved.

10. 发明专利

JPH0570247A AQUEOUS BASIC MONOLITHIC REFRACTORY 失效
公开(公告)号：JPH0570247A
公开(公告)日：1993-03-23
申请号：JP9290191
申请日：1991-03-29
申请人： KYUSHU REFRACTORIES , NIPPON STEEL CORP
发明人： KURATA KOSUKE , MATSUI TAIJIRO , NAKAI MASATO , WATANABE AKIRA , NONOBE KAZUO , ANAMI KENJI
IPC分类号： C04B2/00 , C04B35/66
摘要： PURPOSE:To remarkably produce the slaking preventive effect of an aqueous monolithic refractory to be used for lining various steel making vessels such as a converter, ladle and tundish, using a basic material. CONSTITUTION:This aqueous monolithic refractory contains 100 pts.wt. of MgO, 0.5-10 pts.wt. of Al2O3 and 0.5-5 pts.wt. of CaO. CaO and Al2O3 have a structure mainly present in the periclase grain boundary, and a clinker having slaking resistance is used for the refractory.

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