Vermiculite




Vermiculite is a gibbsite silicate mineral. After heating, it becomes yellow, or white. When it is heated to 850°C-950°C, it will lose its water and expand which volume will increase to 8-15 times. It possesses the characteristics of flameproof, thermal insulation, sound absorption, nontoxic, low capacity, wet absorption, anti-fugi, etc.. It is used in such industries as construction, chemical industry, petroleum, electronics, light industry, environment protection, agriculture, and landscape virescence.
Chemical elements
Element SiO2 Al2O3 Fe2O3 CaO MgO TiO2 FeO
Content 4l.2 12.68 4.06 1.54 0.96 24.22 1.54
Element P2O5 H2O Ma 2 O M nO TiFeO K2O Burn lost
Content 0.06 2 1.6   5.71 5.97 6.71

Specification and quality of vermiculite fine minera
Spe. Expansion times Impurity content % Water content % Color
3.5 -7mm 7 7 8 Yellow
1.5 -3.5mm 7 7 8 Yellow
0.5 -1.5mm 6 10 8 Yellow
2-4mm 8 8 6 White
l-2mm 8 8 6 White
0.5 -1mm 6 8 6 White

Specification and quality of vermiculite inflated product
Spe.afer swell Spe. Fine mineral Capacity kg/m3 water content % Color
10 -20mm 3.5 -7mm 120 <2 Yellow
4-8mm 1.5 -3.5mm 120 <2 Yellow
2-5mm 0.5-1.5mm 130 <1 Yellow
8- 16mm 2-4mm 100 <2 White
5-10mm 1 -2mm 100 <2 White
3 - 6mm 0.5 - 1 mm 110 <2 White