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Crude Vermiculite ore for steel industry & China Hebei Vermiculite & Insulation Vermiculite & A3 Grade Vermiculite & Shanxi Vermiculite

Vermiculite is a hydrous phyllosilicate mineral which undergoes significant expansion (exfoliation) when heated. Exfoliation occurs when the mineral is heated sufficiently. It is very lightweight and mixes easily with other mediums. Vermiculite forms by the weathering or hydrothermal alteration of biotite or phlogopite. 

    product Description

    Crude Vermiculite consists of thin, flat flakes containing microscopic layers of water. Exfoliation on being subjected suddenly to high temperatures (700°C to 1000°C) vermiculite flakes will expand to many times due to the microscopic layers of water turning to steam and forcing the laminar layers apart.
    Exfoliated vermiculite, as insulation, sometimes treated with a water repellent, is used to fill pores and cavities in masonry construction and hollow blockwork to enhance acoustic properties, fire rating and insulation performance. Exfoliated vermiculite can also be used to produce refractory and insulation concretes and mortars, and to make high-temperature binders for construction materials, gaskets, specialty papers, textiles and vehicle brake linings. Finer grades of exfoliated vermiculite can be used to produce various shapes of insulation pellets, high-temperature insulation, as a primary component in cementitious coatings, and as a filler in inks, paints, plastics and other materials.
    Vermiculite can absorb liquids such as fertilizers, herbicides and insecticides, which can then be transported as free-flowing solids. It is used in the fertilizer and pesticide markets because of its ability to act as a bulking agent, carrier and extender. In horticulture, exfoliated vermiculite improves soil aeration and moisture retention, and when mixed with peat or other composted materials, such as pine bark, vermiculite produces a good growing medium for plants. As a soil conditioner, exfoliated vermiculite improves aeration in clay-rich soils and water retention in sandy soils, while reducing the likelihood of compaction, cracking and crusting of the soil.


    Type: Crude Vermiculite & Exfoliated Vermiculite
    Size: 0.2-0.7mm, 0.3-1mm, 0.5-1.5mm 0.7-2mm, 1.4-4mm, 2.5-5mm, 2.8-8mm
    Loose Bulk Density (g/L) : 90-240kg/m3
    Melting Point:  950 - 1350 ℃
    Moisture       :  2-12%
    PH                :  7-9

    Chemical Composition

    SiO2:      38-46%
    Al2O3:   7-9%
    Fe2O3:   4-20%
    MgO:     22-36%
    CaO:      2.0-3.5%
    K2O:      2.1-4.6%
    TiO2:      0.2-1.5%


    Soilless growing medium vermiculite
    Seed germination vermiculite
    Coating vermiculite
    Brake linings Vermiculite
    Roof and floor screeds and insulating concretes vermiculite
    Packing material vermiculiteA
    Lightweight aggregate for plaster vermiculite
    Fireproof wallboard vermiculite
    Hot topping vermiculite: crude vermiculite have been used for hot topping in the steel industry. 


    Packing: 50kg, 1,000kg, 1100kg and 1200kg bags.
    Quantity: 20-26Mt/20’GP