Titania coating kaolinite compound powder and method for preparing same

Titanium oxide coating kaolin composite powder belongs to a process for producing composite white pigment powder through the inorganic treatment method. The raw material formulation is formed by following components with percentage by weight: 12%-18% titanium sulfate, 6%-9% kaolin, 10%-19% carbamide, 0.15%-0.30% sodium hexametaphosphate, 0.5%-1.2% starch, 0.04%-0.08% water-soluble carbonate, 0.01%-0.05% phosphorus acid and rest amount of water. The preparation process comprises the steps of coating reacting, water scouring, salt treatment, acid treatment, dispersion, drying and calcination. The titanium oxide coating kaolin composite powder which is prepared through adopting the homogenous precipitation method has the advantages of even whiteness and small particle size distribution range, and each index all approximates to the index of titanium white powder.