Vermiculite is a magnesium aluminum silicate secondary water metamorphic minerals, the shape of mica, usually black (gold) mica by hydrothermal alteration or weathering, was flexing its thermal dehydration expansion like shape resembles leeches, so called vermiculite. 
 Vermiculite stage divided vermiculite and expanded vermiculite, golden vermiculite, silver-white vermiculite, milky white vermiculite can be divided by color. 
 Vermiculite after high temperature roasting its volume can be rapid expansion of 6-20 times the proportion of expansion for 60-180kg/m3 has a strong insulation performance. 
 Main purpose: 
 Agriculture: vermiculite can be used as soil improver, as having good cation exchange and adsorption can improve soil structure, storage Soil Moisture, improve the soil permeability and aqueous acidic soil becomes neutral soil; vermiculite may also play a buffer role, hinder the PH value of rapid change, slow-release fertilizer in the crop growth medium slightly excessive use of fertilizers, and allow no harm to plants; vermiculite can also be provided to the crop itself contains K, Mg, Ca, Fe, and a trace amount of Mn, Cu,, Zn and other elements. Vermiculite absorbent, cation exchange, and chemical composition characteristics, so that it plays a fertilizer, Paul the multiple roles of water, water storage, breathable and mineral fertilizers. The tests showed that: 0.5-1% of the expanded vermiculite mixed with fertilizer, crop yields can be increased by 15-20%. 
 Gardening aspects: as a horticultural vermiculite, its main role is to increase ventilation and water-holding capacity of the soil (medium). Its fragile, with the use of time, it is easy to make the dense medium lose aeration and water retention, coarse vermiculite than fine to use a long time, and the results are good. Therefore, horticultural vermiculite should choose a thick sheet vermiculite, even if it is a small seed planting medium and as mulch sowing, are thicker as well. 
 Vermiculite can be used for flowers, vegetables, fruit cultivation, breeding and other aspects. In addition, for soilless cultivation for potting soil and regulators. As a to planting potted tree and Business seedbed nutrition grassroots particularly favorable for the transplanting of plants and shipping. Vermiculite can effectively promote root growth and the stable development of the seedlings. Water and nutrients necessary for plant growth for a long time, and can keep root sunshine temperature stability. The vermiculite enables the crop can get plenty of moisture and minerals from the initial stage of growth, to promote the plant faster growth, increase production. 
 Animal husbandry areas: expanded vermiculite unique characteristics of the structure and surface properties, as well as non-toxic, sterile and chemically inert, can be used as a carrier, adsorbent, fixing agent, and feed additives. 
 The use of vermiculite has been widely applied to construction, live gold, oil, shipbuilding, environmental protection, thermal insulation, insulation, insulation, energy-saving and other fields.