Coarse pore silica gel is milky white granules. It is divided into two types: spherical and lumpy. The main component is silicon dioxide, which is insoluble in water and inorganic salts. This product is mainly used for drying various industrial gases, adsorbing organic acids and moisture in transformer oil, high molecular proteins in industrial fermentation processes, harmful multivalent elements in water, etc., purification and separation of drugs, moisture-proofing of items, as well as bedding for pet care, catalyst carrier, and it is also a basic raw material for further processing of fine silica gel series products.