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    • 2. 发明公开
    • VERFAHREN UND VORRICHTUNG ZUM BEHANDELN VON Si/SiC-HALTIGEN SCHLEIFSCHLÄMMEN
    • VERFAHREN UND VORRICHTUNG ZUM BEHANDELN VON Si / SiC-HALTIGENSCHLEIFSCHLÄMMEN
    • EP2504139A1
    • 2012-10-03
    • EP10781685.2
    • 2010-11-22
    • Messer Group GmbHCoenen, Wolfgang
    • COENEN, WolfgangBERGER, ThomasGOCKEL, Frank
    • B28D5/00
    • B28D5/007Y02P70/179
    • The invention relates to reclaiming silicon and/or silicon carbide from siliceous abrasive slurries, wherein the abrasive slurries are first subjected to a method for high-pressure extraction by means of liquid or supercritical carbon dioxide, wherein components comprising oil and polyethylene are dissolved in carbon dioxide. The resulting intermediate product containing Si/SiC and in powder form is subjected under vacuum or inert gas atmosphere to a separating process (16) for separating into a fraction comprising silicon carbide and a fraction comprising silicon. Said separating process (16) preferably consists of separating in a fine screen, a sieve, or a cyclone (16). In particular high-purity silicon can be reclaimed by means of the method according to the invention.
    • 本发明涉及从硅质研磨浆料回收硅和/或碳化硅,其中研磨浆料首先经受液体或超临界二氧化碳高压萃取的方法,其中包含油和聚乙烯的组分溶于碳 二氧化碳。 所得到的含有Si / SiC和粉末形式的中间产物在真空或惰性气体气氛下进行分离过程(16),以分离成包含碳化硅和包含硅的级分的馏分。 所述分离方法(16)优选包括在细筛,筛或旋风分离器(16)中分离。 特别地,可以通过根据本发明的方法回收高纯度硅。