The SiO2 content in silica ranges from 98.02% to 98.52%, along with 0.97% to 1.04% Al2O3, 0.62% to 0.67% Fe2O3, 0.034% to 0.043% CaO, and 0.003% P2O5. Metallurgical-grade silica is used as a raw material in the smelting of industrial silicon and other ferroalloys, for the preparation of silicon compounds and silicates in the chemical industry, and also as packing material in sulfuric acid towers.