Vermiculite is a secondary metamorphism mineral of hydro alumino silicate containing magnesium, the shape of raw vermiculite is like mica. Vermiculite can be divided into golden vermiculite and silver vermiculite. With expansion or not, it can also be divided into raw vermiculite and expanded vermiculite. After a series of rough processing such as sand removal, impurity removal, crushing and screening, the vermiculite raw ore is in the form of flakes. Raw vermiculite has been widely used in construction, metallurgy, petroleum, shipbuilding, environmental protection, heat preservation, heat insulation, insulation, energy saving and other fields.
When the vermiculite is calcined at 800~1000℃, the volume expands rapidly, which increases by 6~15 times and becomes “worm-like” expanded vermiculite. The average bulk density of the expanded vermiculite is 1~2g/cm3. The expanded vermiculite has fine air barriers, so it has excellent thermal insulation performance. Expanded vermiculite has unique structural characteristics and surface properties, as well as non-toxic, sterile and chemically inert properties. So it is an excellent heat preservation, heat insulation, sound absorption, frost-resistant building materials as well as industrial fillers, coatings and refractory materials. Expanded vermiculite is mainly used in construction, insulation, filling, agriculture and gardening.
We provide both golden vermiculite and silver vermiculite, raw vermiculite and expanded vermiculite with different sizes and qualities as you require. The expansion times can be 6-9 times for different products. The sizes we supply for raw vermiculite is commonly the NO. 3(3.2-7mm)/NO. 4(1.2-3.2mm)/NO. 5(0.3-1mm) flakes. The sizes we supply for expanded vermiculite is commonly 1-3mm, 2-4mm and 3-6mm. We supply the vermiculite product with comprehensive sizes, excellent quality and competitive price, and hope to become your trusted collaborator!