GREEN AND ENVIRONMENTALLY FRIENDLY SULFURIC ACID PROCESS TITANIUM DIOXIDE POWDER PRODUCTION EQUIPMENT AND TECHNIQUE

摘要

The present invention relates to green and environmentally friendly sulfuric acid process titanium dioxide powder production equipment and technique. Production processes from the most upstream to the most downstream comprise sequentially: pulverization, acidolysis, precipitation, vacuum crystallization, disk filtration, fine filtration, vacuum concentration, titanium solution preheating, hydrolysis, first wash plate mounting, beating, first wash, bleaching, second wash, frame filter press, salt-treatment vacuum drum dehydration, calcination, Raymond mill, beating dispersion, sanding, coating, third wash, drying, jet milling, and packaging. The present invention not only allows increased titanium dioxide recovery rate, thus creating economic benefits for sulfuric acid process titanium dioxide powder enterprises, but also reduces discharging of waste acid and of wastewater, thus reducing environmental impact and creating environmental benefits for society, and is a green and environmentally friendly novel technique.