现在,铝金属的应用非常广泛,仅次于钢。因此,世界铝的生产发展很快,国际市埸的价格也成倍的增涨。铝土矿是生产铝金属最好的主要矿石原料。在地壳中氧化铝约占7.45%,仅次于二氧化硅,居第二位。但是,可供开采利用的铝土矿则集中分布在世界少数地区。据统计,目前世界已探明的铝土矿资源四分之三都产出在发展中国家。储量超过10亿吨的国家有澳大利亚、巴西、几内亚、圭亚那、印度、牙买加以及喀麦隆等。 Aluminum is now widely used, second only to steel. Therefore, the world’s aluminum production has developed rapidly, the price of the international market has doubled. Bauxite is the best primary raw material for the production of aluminum. Alumina in the crust accounts for about 7.45%, second only to silica, ranking second. However, the available bauxite is concentrated in a few parts of the world. According to statistics, at present, three-quarters of the world’s proven bauxite resources are produced in developing countries. Countries with more than 1 billion tons of reserves are Australia, Brazil, Guinea, Guyana, India, Jamaica and Cameroon.