1. Components (the following values are from one test result):
SiO2 34-53%
Fe2O3 9-20%
Al2O3 13-17%
MgO 7-18%
CaO 0.5-2%
2. Specifications
The sizes are as the following:
0.3-1mm, 1-2mm, 2-4mm, 3-7mm
3 The characters
3.1 Exfoliation
3.2 Moisture retention
3.3 Air Circulation
3.4 Low density
3.5 Insulating and fire resistant
3.6 Multicellular germination
4 Functions
Vermiculite is widely used in several industrial applications such as :
4.1 Aggregate and component in lightweight concrete aggregate (light calcimine, light mortar)
4.2 Refractory: painting material for walls, fire-proof plate, fire-proof mortar, refractory bricks;
4.3 Thermal insulation material: acoustical absorbent for
underground pipelines, warm-keeping material for greenhouse, in-built for interior of the buildings and tunnels, the materials for the walls and ceilings in public places;
4.4 metallurgy: cladding material, de-slagging and vermiculite bulk material
4.5 Agriculture, gardens, :golf greens, seeds preservation, soil conditioner, wetting agent, plant growth regulator, feed additive
4.6 Fishing industry: bait
4.7 Others: Absorbent, filter aid, active carrier for chemical products and fertilizers, sewage treatment, oil absorbent, filter tip for cigarette, density regulator.
