作者：Mike Darling;

作者单位：Palabora Europe Ltd., Guildford, Surrey, in collaboration with Hoben International, Newcastle-under-Lyme, Staffordshire.

刊名：The Refractories Engineer

ISSN：1362-4547

出版年：2002-01-05

卷：0

期：may

起页：11

止页：14

分类号：TQ175

语种：英文

关键词：

内容简介

Vermiculite is a member of the phyllosilicate or sheet silicate group of minerals. The phyllosilicate group of minerals has several important sub-groups, including the micas, clay minerals and the chlorite group. Vermiculite is classified as a variety of the mica sub-group. In its macroscopic form vermiculite has been known for nearly 180 years, but it can also be identified as a constituent of some clay mineral assemblages. However, in the commercial field, rather than as a pure mineralogical definition, the term vermiculite can be applied to a range of hydrated ferromagnesian aluminium sheet silicates. Commercial vermiculites are characterised as having the remarkable ability of being able to undergo thermal exfoliation, a process whereby the vermiculite ore is thermo-processed to yield a commercially important low density, granular product, which is used by a diverse range of industries.