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英国的著名金属矿山虽已开采完毕,但仍拥有金属采矿工业,生产铅、铜、锌和大约占世界供应量2%的锡,几个生产萤石副产品方铅矿精矿的矿山在另一篇介绍工业矿物的文章中介绍,下面仅就几个主要生产金属精矿的矿山加以叙述。 1981年,美国生产了731,000吨铁矿石,含有4,000吨锡的锡精矿,15,300吨铅、铜和锌。正如下面所指出的,大部分铁矿业已
Although the well-known British metal mines have been mined, they still own the metal mining industry, producing lead, copper, zinc and about 2% of the global supply of tin. Several mined fluorite by-product galena concentrates are also available An article introducing industrial minerals is described below in the context of only a few mines that produce mainly metal concentrates. In 1981, the United States produced 731,000 tons of iron ore, tin concentrate containing 4,000 tons of tin, and 15,300 tons of lead, copper and zinc. As pointed out below, most iron mines are already there