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    • 10. 发明授权
    • Processes for producing high-brightness kaolin in high yields, and kaolin materials produced therefrom
    • 以高产率生产高亮度高岭土的方法和由其生产的高岭土材料
    • US08967383B1
    • 2015-03-03
    • US14055467
    • 2013-10-16
    • KaMin LLC
    • Deqiang MaCharles Allen NewsomeAubrey Clay SmithJohn TaylorRichard Douglas Carter
    • B03B1/00C01B33/40C04B33/04
    • C01B33/40C04B33/04
    • The present disclosure teaches improved processes to produce high-brightness kaolins at high yields from various natural sources of crude kaolin. In some embodiments, a process for treating mined kaolin comprises: blunging kaolin material with water at high shear to form a slurry; introducing the slurry to one or more beneficiation units for flocculation of titania (e.g., anatase) and titania-associated impurities (e.g., iron); introducing a sodium silicate composition, or precursors thereof, to the beneficiation units, wherein the sodium silicate composition is characterized by a Na2O/SiO2 ratio selected from about 0.25 to about 2.5; and recovering a suspension comprising at least 70% of the kaolin clay. The selected sodium silicate composition enhances flocculation of the titania while maintaining dispersion of the kaolin clay in the slurry. One or more chemical leaching reactions generate a treated kaolin that is characterized by a brightness of about 90 or higher.
    • 本公开内容教导了以多种天然来源的粗高岭土以高产率生产高亮度高岭土的改进方法。 在一些实施方案中,一种用于处理开采高岭土的方法包括:用高剪切力的水将高岭土材料闪蒸以形成浆料; 将浆料引入一个或多个用于二氧化钛(例如锐钛矿)和二氧化钛相关杂质(例如铁)的絮凝的选矿单元; 将硅酸钠组合物或其前体引入选矿单元,其中硅酸钠组合物的特征在于选自约0.25至约2.5的Na 2 O / SiO 2比率; 并回收包含至少70%的高岭土的悬浮液。 所选择的硅酸钠组合物增强二氧化钛的絮凝,同时保持高岭土在浆料中的分散。 一种或多种化学浸出反应产生特征在于约90或更高的亮度的处理高岭土。