Silica materials described
Silica is a white powder X- ray amorphous silica and silicate products, collectively, mainly refers to precipitated silica, fumed silica, silica gel and superfine airgel, including powder synthetic aluminum silicate and calcium silicate. Silica is a porous material, the composition can be used SiO2 · nH2O, where nH2O exist in the form of surface hydroxyl groups. Can be dissolved in caustic soda and hydrofluoric acid, insoluble in water, solvents and acids (except hydrofluoric acid). High temperature, non-flammable, tasteless, odorless, has good electrical insulation properties.

Working principle
Hot air from the inlet pipe with suitable atomizing speed from the bottom of the dryer into the stirring and crushing and drying chamber, the material exerts strong shearing, blowing, floating and rotating effect material by centrifuge, shearing, impacting and friction is atomized strengthen the mass and heat transfer. At the bottom of drier, wetter particles larger group under the action of the agitator is mechanically crushed, low moisture content, particle size smaller particles are rotating airflow entrained rise further dried during ascent. Since the gas-solid flow in rotating. Solid phase inertia than that of gas, the larger the relative velocity between solid and gas phases, and strengthen the heat and mass transfer between two phases. So it strengthens the process.