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INDUSTRIAL SAND AND GRAVEL

机译:工业砂石

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摘要

Domestic production of industrial sand and gravel in 2008 was about 30 Mt (33 million st), unchanged from that of 2007. U.S. apparent consumption was 27.5 Mt (30.3 million st) in 2008, unchanged from that of the previous year and imports increased slightly to 516 kt (568,000 st) in 2008. Imports of silica are generally of two types: small-quantity shipments of very-high-purity silica, or a few large shipments of lower-grade silica that were shipped only under special circumstances (such as very low freight rates). Some examples of end uses for industrial sand and gravel include abrasives, filtration, foundry, glassmaking, hydraulic fracturing and silicon metal applications.
机译:2008年,国内工业砂和砾石的产量约为30 Mt(3,300万公吨),与2007年持平。美国的表观消费量为27.5 Mt(3,030万公吨),与上一年持平,进口略有增加到2008年达到516 kt(568,000 st)。进口的二氧化硅通常分为两种:少量的高纯度二氧化硅,或少量的仅在特殊情况下装运的低等级二氧化硅(例如因为运费很低)。工业用沙和砾石的最终用途的一些示例包括研磨剂,过滤,铸造,玻璃制造,水力压裂和金属硅应用。

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