Expanded vermiculite http://www.hebeizhishi.com is the vermiculite as raw materials, drying, crushing, roasting, a sharp increase in the short term fairy volume in the expansion (6-20 times) and a golden yellow granular material . With light bulk density, thermal conductivity, fire anti-corrosion, chemically stable, non-toxic and odorless characteristics. 

 Widely used in construction, chemical, petroleum, electricity, plant cultivation, scientific research departments of workers and peasants, for heat insulation, sound absorption, fire prevention materials, and for the planting of flowers and cuttings, tubers. 

 Bulk density of expanded vermiculite, which is about 80-180kg per cubic meter. Expansion of the vermiculite particles structure is thin bedded laminated, which is fraught with air, their thermal conductivity is low, the expansion of the coefficient of the vermiculite conduction tears generally 0.07-0.07w/mk, at normal temperature (temperature range 20-30 degrees) and the expansion of thermal conductivity and particle size and bulk density of vermiculite detailed product specifications, technical performance table. 

 Expanded vermiculite refractoriness for 1300-1350, and the safe use of a temperature of -30 to 1100 degrees. Expanded vermiculite and some moisture absorption rate is small, 100% relative humidity environment, after 24 hours, the moisture absorption rate is generally not more than 2%. Expanded vermiculite in the dry state, has good frost resistance, after 15 freeze-thaw at -20 ° C, the particle size composition of the same. Expanded vermiculite and inorganic substances, therefore not eroded by the fungus, do not rot, is not bad, can not easily be moth-eaten rat-bite. Expanded vermiculite alkali-acid, it is not appropriate for acid erosion at. 
 http://www.hebeizhishi.com vermiculite stone