摘要：黏土矿物具有良好的可塑性、耐火性、绝缘性和化学稳定性,是重要的基础性工业原料,广泛应用于陶瓷、耐火材料、造纸、塑料橡胶等领域。黏土矿物的白度是评价其质量等级的重要指标,其主要影响因素是铁、钛、碳等致色元素和有机质的存在。综述现阶段采用物理法、化学法和微生物法进行除色增白的原理和技术,分析各类方法的增白效果以及存在的问题,指出黏土增白技术的发展方向。

Abstract: Clay minerals have good plasticity，fire resistance，insulation and chemical stability，which are the important basic industrial raw materials and are widely used in ceramics，refractory materials，paper making，plastics，rubber and other fields．The whiteness of clay minerals is an important indicator for evaluating its quality grade．The main influencing factors are the presence of coloring elements such as iron，titanium and carbon and organic matter．The principles and techniques of color removal and whitening by physical，chemical and microbiological methods were reviewed．The whitening effects and existing problems of various methods were analyzed and the development direction of clay whitening technology was also proposed．

Keywords: clay mineral; whiteness; whitening technology