Based on tio2 has a high refractive index, strong achromatic power, covering power, good weather resistance, strong dispersion, good luster, physical and chemical stability and many other excellent characteristics, so it is the largest amount, the best quality, the most widely used white pigment. It is an indispensable raw material in electronics, chemical, light industry and metallurgy industries, and is an important chemical product with a wide range of application prospects.