The silica fume can be divided into powdered silica fume and granular silica fume according to its morphology. In general, the powdered silica fume is not processed by the encrypted equipment; the granular micro silica fume is processed by the encryption equipment. There is a great difference in the density of both, but there is little difference in the chemical composition.
Granular silica fume is more stable in physical form, its dust is united into ball, it is not easy to lift, and it is better in construction. Some countries have strict requirements for environmental protection, and the use of granular silica fume powder can reduce the environmental pollution in construction. Granular silica fume has its own advantages in transportation efficiency and cost control.
At present, micro silica fume is widely used in construction industry and refractories industry. With the development of refractory technology in the construction industry and the nature of microsilica fume, the granular densified silica fume has been widely recognized.