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    Method for producing silica brick for hot repair
    11.
    发明专利
    Method for producing silica brick for hot repair 有权

    公开(公告)号：JP4700560B2

    公开(公告)日：2011-06-15

    申请号：JP2006135069

    申请日：2006-05-15

    Applicant: 新日本製鐵株式会社 ,  黒崎播磨株式会社

    Inventor： 昌昭 三島 ,  利之 保木井 ,  初雄 平 ,  敬輔 浅野

    IPC: C04B35/14 ,  F27D1/00 ,  F27D1/16

    Abstract: PROBLEM TO BE SOLVED: To obtain silica stone brick for hot repairing which is free from the occurrence of crack or damage due to temperature change by quickly heating and cooling across a temperature zone of about 250°C and can keep excellent thermal shock resistance over a long period. SOLUTION: In a method of producing the silica stone brick for hot repairing using a refractory raw material formulation comprising 30-65 mass% tridymite clinker and 35-70 mass% molten quartz, the tridymite clinker contains 90 mass% tridymite as a mineral phase, wherein the ratio Ic/It of X-ray diffraction intensity Ic of low temperature type cristobalite to X-ray diffraction intensity It of low temperature type tridymite and the ratio Iq/It of X-ray diffraction intensity Iq of low temperature type quartz to X-ray diffraction intensity It of low temperature type tridymite is respectively ≤0.05. Because a tridymite phase having small volume change following the low temperature-high temperature type transition is enriched, the silica stone brick for hot repairing which has excellent thermal shock resistance is produced. COPYRIGHT: (C)2008,JPO&INPIT

    The carbon-containing refractories
    13.
    发明专利
    The carbon-containing refractories 有权

    公开(公告)号：JP5578680B2

    公开(公告)日：2014-08-27

    申请号：JP2011064581

    申请日：2011-03-23

    Applicant: 黒崎播磨株式会社

    Inventor： 学 木村 ,  龍哉 大内 ,  雅人 田中 ,  利之 保木井

    IPC: C04B35/043 ,  C04B35/101 ,  C04B35/632 ,  C04B35/64 ,  F27D1/00

    Abstract: PROBLEM TO BE SOLVED: To improve corrosion resistance and spall resistance of a refractory used for an industrial furnace, especially a refractory used for pig iron making or a steelmaking process in steel industry.SOLUTION: Concerning this carbon-containing refractory which is obtained by compacting a body obtained by adding a binder to a refractory raw material composition containing 0.1-5 mass% lanthanum oxide and 0.5-25 mass% carbon raw material and by kneading the mixture, and by subjecting the compact to heat treatment, at least either of following conditions a and b is satisfied. Condition a: a binder generating steam during the heat treatment is used. Condition b: the heat treatment is performed under an atmosphere containing steam and/or carbon dioxide.

    Nano-carbon-coated refractory raw material and method of manufacturing the same, and refractory and its manufacturing method using it
    18.
    发明专利
    Nano-carbon-coated refractory raw material and method of manufacturing the same, and refractory and its manufacturing method using it 有权

    公开(公告)号：JP5192774B2

    公开(公告)日：2013-05-08

    申请号：JP2007277550

    申请日：2007-10-25

    Applicant: 黒崎播磨株式会社

    Inventor： 利之 保木井 ,  丈記 吉富 ,  俊博 駿河 ,  勝美 森川 ,  勲 持田 ,  聖昊 尹

    IPC: C04B35/628 ,  C01B31/02 ,  C04B35/043 ,  C04B35/103 ,  F27D1/00

    Abstract: PROBLEM TO BE SOLVED: To provide a refractory raw material and its manufacturing method where the uniform dispersion of carbon nanotubes (CNT) or carbon nanofibers (CNF) can be relatively easily performed in a refractory and where the refractory excellent in thermal shock resistance and slag resistance can be achieved and to provide a refractory using the refractory raw material and its manufacturing method. SOLUTION: The refractory raw material coated with nanocarbon where the surface of refractory raw material particles 1 is coated with CNT or CNF is manufactured by supporting a catalyst on the refractory raw material particles and by heat-treating the resultant refractory raw material particles under the contact with a carbon compound. The refractory raw material coated with nanocarbon is blended with a refractory raw material by 1-30 mass% to form a refractory raw materila composition. The refractory composition is added with an organic binder, kneaded and heat-treated after molding, to thereby prepare a refractory containing nanocarbon. COPYRIGHT: (C)2008,JPO&INPIT

    Magnesia - alumina - titania bricks
    19.
    发明专利
    Magnesia - alumina - titania bricks 有权

    公开(公告)号：JP4960541B2

    公开(公告)日：2012-06-27

    申请号：JP2000068671

    申请日：2000-03-08

    Applicant: 黒崎播磨株式会社

    Inventor： 利之 保木井 ,  豊康 尾花

    IPC: C04B35/043 ,  C04B35/66 ,  F27D1/00

    CPC classification number: C04B35/66 ,  C04B2235/3206 ,  C04B2235/3217 ,  C04B2235/3222 ,  C04B2235/3232

    Abstract: PROBLEM TO BE SOLVED: To provide a magnesia-alumina-titania-based brick which is chromium- free and excellent in spalling resistance. SOLUTION: This magnesia-alumina-titania-based brick contains 1-20 mass % alumina raw material, 1-15 mass % titania raw material and 70-95 mass % magnesia raw material as refractory aggregates. Among the above magnesia, electrofused magnesia containing 0.1-1 mass % SiO2 as a chemical component occupies 50 mass % or more of the whole refractory aggregate. The blended material having such a composition is kneaded, molded and sintered to obtain the objective brick.

    Low carbonaceous magnesia carbon brick
    20.
    发明专利
    Low carbonaceous magnesia carbon brick 有权

    公开(公告)号：JP4681456B2

    公开(公告)日：2011-05-11

    申请号：JP2006000392

    申请日：2006-01-05

    Applicant: 黒崎播磨株式会社

    Inventor： 利之 保木井 ,  章二 吉田 ,  聡 坪井 ,  英一郎 波多江 ,  博之 淵本

    IPC: C04B35/043 ,  B22D41/02 ,  C04B35/66 ,  F27D1/00

    Abstract: PROBLEM TO BE SOLVED: To impart a strength and spalling resistance equivalent to a magnesia carbon brick containing a comparatively large amount of graphite, to a low carbon magnesia-containing fire-resistant unburned brick containing chromium, while preventing occurrence of a carbon pickup and maintaining superior corrosion resistance. SOLUTION: The low carbonaceous magnesia carbon brick is obtained by adding an organic binder to a fire-resistant raw material mixture consisting of 90-99 mass% of a magnesia-based raw material, 0.5-5 mass% of a flake graphite, and 0.3-10 mass% of metal chromium and/or a chromium alloy; kneading; molding and heat-treating; and its fixed carbon content is 0.5-7 mass%. The magnesia-based raw material in the fire-resistant raw material mixture of this low carbon magnesia carbon brick is occupied by particles having particle sizes from larger than 10 μm to 500 μm by 20-50 mass%, and the amount of particles having a particle size of 10 μm or smaller is 5 mass% of the fire-resistant raw material mixture. COPYRIGHT: (C)2007,JPO&INPIT

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