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FLUORSPAR

机译:萤石

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摘要

Fluorspar was not mined in the United States during 2004, although a small amount of usable synthetic fluorspar (CaF_2) was produced from industrial waste streams. The majority of fluorspar consumed in the United States came from imports or stockpiled material purchased from the National Defense Stockpile (NDS). In addition, consumption is supplemented by use of byproduct fluorosilicic acid produced at phosphoric acid plants. In 2004, annual production of fluorosilicic acid was 50 kt (55,000 st) or about 88 kt (97,000 st) of 92 percent fluorspar equivalent.
机译:尽管从工业废物流中生产了少量可用的合成氟石(CaF_2),但2004年美国没有开采氟石。美国消耗的大部分萤石来自进口或从国防库存(NDS)购买的库存材料。另外,通过使用在磷酸工厂生产的副产物氟硅酸来补充消耗。 2004年,氟硅酸的年产量为50 kt(55,000 st),约占92%氟石的88 kt(97,000 st)。

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