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    • 16. 发明专利
    • Cathode carbon block for aluminum smelting purposes, and method for producing the same
    • 用于铝冶炼用途的阴极碳块及其制造方法
    • JP2011208252A
    • 2011-10-20
    • JP2010078759
    • 2010-03-30
    • Nippon Denkyoku Kk日本電極株式会社
    • TODA SHINJIROISHIKAWA AKIFUMI
    • C25C3/08C01B31/02C01B31/30
    • C25C3/08C01B32/20C01B32/90C01B32/921C04B35/522C04B2235/3843C04B2235/422C04B2235/425C04B2235/5427C04B2235/5436C04B2235/5472C04B2235/9607C04B2235/9676Y02P20/124
    • PROBLEM TO BE SOLVED: To provide a cathode carbon block for aluminum smelting purpose which has low specific electric resistivity and high heat conductivity in order to improve the energy efficiency in an aluminum electrolytic furnace, and to provide the cathode carbon block for aluminum smelting purpose which has improved wettability for an aluminum melt and enables the reduction of the rate of electrochemical invasion to achieve a prolonged service life and the method for producing the same.SOLUTION: In a mixing step, a carbonization raw material and titanium carbide are mixed with each other at a mixing ratio of 64-97% carbonization raw material and 3-36% titanium carbide, wherein the ratio of titanium carbide in a raw material composition having ≤1 mm particle diameter is 5-100%. In a kneading and molding step, an organic binder is added into the mixture through the mixing step and the resulting mixture is kneaded and molded. In a firing step, the molding is fired. In a graphitization step, the fired body fired through the firing step is graphitized at 2,400-3,000°C.
    • 要解决的问题:为了提供铝电解炉的能量效率,为了提供铝熔炼用的阴极碳块,提供具有低比电阻率和高导热性的用于铝冶炼目的的阴极碳块,并且提供用于铝冶炼目的的阴极碳块 具有改善铝熔体的润湿性,能够降低电化学侵入速率以达到延长的使用寿命及其制造方法。在混合步骤中,将碳化原料和碳化钛彼此混合 以64-97%的碳化原料和3-36%的碳化钛的混合比,其中,具有≤1mm粒径的原料组合物中的碳化钛的比例为5-100%。 在捏合和模塑步骤中,通过混合步骤将有机粘合剂加入到混合物中,并将所得混合物捏合并模塑。 在烧制步骤中,模制件被烧制。 在石墨化步骤中,通过烧制步骤燃烧的烧制体在2,400-3,000℃石墨化。