good quality VERMICULITE Industrial Grade hot sale

I. properties and structure of vermiculite

The main chemical forms of vermiculite are (Mg, Ca) 0.7 (Mg, Fe, Al), 6.0[(Al, Si), 8.0] (OH4.8H2O). The common chemical formula is (Mg2.36Fe0.48Al0.16) (Si2.72Al1.28O10 (OH) 2) (Mg0.32 (H2O) 4.32)

Vermiculite can be according to the stages can be divided into vermiculite and expanded vermiculite, according to color classification can be divided into golden vermiculite, vermiculite, vermiculite milky white silver white.

After roasting at high temperature, the vermiculite flake can expand rapidly 6-20 times, and the proportion of expansion is 60-180kg/m3. It has a strong thermal insulation performance.

Physical and chemical properties

Often present in biotite or gold clouds. A brown, yellow, gold, bronze, sometimes greenish. Luster weaker than mica, greasy luster or pearl luster. Cleavage is complete and flakes are flexible. Hardness 1~1.5. Relative density 2.4~2.7.

Polarizer: achromatic, colorless to light brown. Two axis crystal (-), the optical axis angle is very small. Ng=1.545~1.585, Nm, =1.540~1.580, Np=1.525~1.560.

Swelling, cation exchange and adsorption; swelling vermiculite also has good water absorption; sound insulation; heat insulation and fire resistance; frost resistance; stable chemical properties of expanded vermiculite. Insoluble in water. PH value 7~8. Non-toxic, tasteless, without side effects.