It is mainly used to dry different kinds of industrial gases, to adsorb organic acid and water from transformer oil, and multivalent harmful elements from macromolecule protein in industrial fermentation, to purify and separate drug substances, to protect goods from damp damage, to be litter for pets, catalyst carrier and the basic raw material in further fine silica gel processing. Its inner structure is as follows: pore volume: 0.8-1.0ml/g, pore diameter: 80-100A, specific surface area: 350-450m2/g.