Vermiculite is a natural mineral that expands with the application of heat. The expansion process is called exfoliation and it is routinely accomplished in purpose-designed commercial furnaces. Vermiculite is formed by weathering or hydrothermal alteration of biotite or phlogopite.
14.5-15.5kg/pe or pp bag, 350bags/20fcl, 720bags/40hq
3-1mm/1-2mm/2-4mm or other sizes customers required.
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