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VERMICULITE

机译:MIC石

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摘要

Vermiculite is an altered mica that contains trapped water that is released upon the application of high heat (870 deg C or 1,598 deg F). This causes the silicate sheets to separate into an accordion-shaped, lightweight aggregate about 45 times the size of the original particle. This conversion process is referred to as exfoliation. It results in lightweight, insulating, inert, highly absorbent, and nonreactive functional filler. Vermiculite is mined from shallow (<25 m or 82 ft) surface deposits throughout the world. The two largest producers are Palabora Mining in South Africa (ore stock is a phylogopite mica) and W.R. Grace & Co., in Enoree, SC (ore stock is a biotite mica).
机译:石是一种经过改变的云母,其中含有截留的水,这些水在施加高热量(870摄氏度或1,598华氏度)后释放。这导致硅酸盐片分离成手风琴状的轻质聚集体,其大小约为原始颗粒大小的45倍。该转换过程称为剥离。它产生了重量轻,绝缘,惰性,高吸收性和非反应性的功能性填料。石是从世界各地的浅层(<25 m或82 ft)表层矿中开采出来的。最大的两个生产商是南非的Palabora Mining(矿石储量是一种云母云母)和位于南卡罗来纳州Enoree的W.R. Grace&Co.(矿石储量是黑云母云母)。

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