前言高岭土由于具有良好的物理化学性质,用途极为广泛,特别用于造纸工业的涂料。造纸用高岭土由于对其中着色杂质的含量要求严格,需要进行深度加工,以除去杂质,特别是铁的氧化物以提高其工艺性能。根据我国80个高岭土矿床矿石化学成份的分析表明,它们毫无例外的都含有Fe_2O_3,其中绝大多数都高于0.5％。虽然这些矿床的高岭土。就其成份和结晶特性而言,并非全部都适宜作为生产高质量的造纸涂料,但由此不难看出国内高岭土资源的利用和精制,除铁的任务是相当普遍的。 Introduction Kaolin has a very wide range of uses due to its good physicochemical properties, especially for coatings in the paper industry. Papermaking kaolin due to its content of colored impurities demanding, the need for deep processing to remove impurities, especially iron oxide to improve its process performance. According to the analysis of ore chemical composition of 80 kaolin deposits in China, they all contain Fe_2O_3 without exception, most of them are higher than 0.5%. Although these deposits kaolin. In terms of its composition and crystallinity, not all of them are suitable as high quality paper and paper coatings, but it is not difficult to see that the utilization and refining of kaolin resources in China are quite common.