Exploration and practice of cleaner production of titanium dioxide by sulfuric acid process.

In China, titanium dioxide production is still based on sulfuric acid process which suffers from high energy consumption, serious pollution and long process. For solves the traditional problems, cleaner production is an effective way for the high-quality development and comprehensive green transformation of sulfate titanium dioxide industry. Taking a titanium dioxide company in Panzhihua as an example, this paper expounds the exploration and practice of utilizing advanced process equipment to transform the original specific process and improve the clean production process and equipment. The company has upgraded the continuous acidolysis process, VCE (Vapor-Condense-Evaporate) crystallization process and MVR (Mechanical Vapor Recompression) concentration process for the three core sections with serious waste and energy consumption, and effectively coupled with the other original sections. Through the analysis of production operation, the new process significantly improves the comprehensive resources utilization efficiency of titanium, sulfur and iron, improves the working environment of labors, and reduces the energy consumption, the amount of three wastes and the production cost. Company in the gradual realization of cleaner production, made beneficial exploration. [ABSTRACT FROM AUTHOR]