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Silica sand

机译:硅砂

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摘要

The US Bureau of Mines estimated that from 1993 to 1994 domestic production of industrial sand and gravel increased 800 kt tons (880,000 st). In 1994, it was estimated that 27 Mt (29.7 million st) of industrial sand and gravel, valued at nearly 460 million dollars, were produced by 88 companies from 153 operations in 38 states. This is about a 3 percent production increase from 1993. This yielded an average unit price value of 16.92/t dollars(18.65/st dollars), down from 17.33/t dollars (19.10/st dollars) in 1993. Company officials verified that 1994 was a good production year. However, most mentioned that prices did not keep up with inflation. The top five producers of industrial sand and gravel continue to be Unimin, US Silica (a subsidiary of US Borax and Chemical), Fairmount Minerals (Wedron Silica, TechniSand and Best Sand), The Morie Co. (South Jersey Industries) and Oglebay Norton Co. (California Silica Products, Central Silica and Texas Mining Co.). In 1993, these companies operated 47 plants domestically. About 33 kt (36,300 st) of strontium carbonate (20 kt or 22,000 st strontium) were imported from several countries. More than 90 percent of all strontium imports were from Mexico. Strontium compound exports were low, totaling about 1.9 kt (2000 st) (1.1 kt or 1200 st strontium). US strontium imports and consumption increased about 30 percent in 1994. This was due to increased domestic production of color television picture tube glass.
机译:美国矿业局估计,从1993年到1994年,国内工业用沙和砾石的产量增加了800 kt吨(880,000 st)。 1994年,据估计有88家公司在38个州的153家工厂生产了27吨(2,970万st)工业沙子和碎石,价值近4.6亿美元。与1993年相比,产量增加了约3%。平均单价为16.92 / t美元(18.65 / st美元),低于1993年的17.33 / t美元(19.10 / st美元)。公司官员证实,1994年是一个丰收的一年。但是,大多数人提到价格没有跟上通货膨胀的步伐。工业砂和砾石的前五名生产商继续是Unimin,美国二氧化硅(美国硼砂和化学的子公司),费尔芒特矿产(Wedron二氧化硅,TechniSand和Best Sand),莫里公司(南泽西工业)和Oglebay Norton。公司(加利福尼亚二氧化硅产品公司,中央二氧化硅公司和德克萨斯矿业公司)。 1993年,这些公司在国内经营着47家工厂。从多个国家进口了约33 kt(36,300 st)的碳酸锶(20 kt或22,000 st锶)。所有锶进口量的90%以上来自墨西哥。锶化合物的出口量较低,总计约1.9 kt(2000 st)(1.1 kt或1200 st锶)。 1994年美国锶的进口和消费量增加了约30%。这是由于国内彩色电视显像管玻璃产量的增加。

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