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南非纳塔尔大学新近研制成了一种从低品位铝土矿中除铁的方法。该法是用盐酸溶解铝土矿中的铁化合物,然后加工含氧化铝成份高的物料,生产可用于造纸工业用的优质硫酸铝。也可制成多种其它氧化铝
Natal University in South Africa recently developed a method of removing iron from low-grade bauxite. The method is to dissolve the iron compounds in bauxite with hydrochloric acid and then process the high alumina-containing material to produce high-quality aluminum sulfate for the paper industry. A variety of other aluminas can also be made