前言高岭土广泛应用于几十个工业部门,其中造纸高岭土用量大,生产企业效益高。近几年来,我国造纸工业对高岭土的需要量不断增长,对其质量也提出了更高的要求。高岭土的白度低,将降低其使用价值。而随着矿山的深入开采,资源日益贫化,高岭土所含的杂质复杂且微细,采用通常的物理选矿方法已不能获得满意效果。为充分利用国家资源,许多单位开展了高岭土漂白的研究,取得了一定的成绩。这些研究多采用传统的连二亚硫酸钠的还原法对含氧化铁型高岭土进行漂白,但由于洗涤、药剂价格昂贵以及 Foreword Kaolin is widely used in dozens of industrial sectors, including papermaking kaolin large amount of benefits, high efficiency of production enterprises. In recent years, the demand of kaolin in paper industry of our country is increasing continuously, and the quality is also put forward higher requirements. Kaolin whiteness is low, will reduce its value. With the further mining of the mines, the resources are getting depleted and the impurities contained in the kaolin are complex and fine. The usual physical beneficiation methods have not been able to obtain satisfactory results. In order to make full use of national resources, many units have carried out research on bleaching of kaolin and have achieved some success. Most of these studies use traditional sodium dithionite reduction to bleach iron oxide-containing kaolin, but they are expensive due to washing, and