(1) 8~12, 12~18, and 18-20 are used as heat preservation and heat insulation materials and are widely used in the construction field. (2) 20-30, 30~50 mesh pearl sand can be used as the cover agent and slag removal agent after expansion. (3) 30-50, 50-70 mesh is production of obturator perlite, vitrified micro bead thermal insulation material is mainly raw materials (4) 50-70 mesh pearl sand after the expansion can be beer, medicine as a filtering agent and oxygen making machine with low temperature storage tank insulation. (5) super fineness of perlite ore can be used in rubber and plastic products, pigment, paint, ink, synthetic glass, heat insulation bakelite and some mechanical components and equipment in as filling material
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