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Distribution of impurities from low grade titanium slag as raw material in titanium dioxide manufacturing by sulfate process

Wang Bin;Li Chun;Yang Yangjun;College of Chemical Engineering,Sichuan University;Pangang Group Research Institute Co.,Ltd.;  
The feasibility of low grade titanium slag as raw material for the production of sulfuric acid process titanium dioxide was studied.The phase composition and the distribution of impurities,such as Ca O,Mg O,Al2O3,Si O2,TFe,V,and Cr,from the low grade titanium slag during the manufacturing process of titanium dioxide by sulfuric acid process were analyzed.The quality of initial product of titanium dioxide was further studied.Results showed that the impurities,such as Si O2,V,Cr,and Ca O,were mainly distributed in the acid composition residue,while the others,such as Mg O,Al2O3,and TFe,were mainly distributed in the waste water coming from the filtrating and washing process of hydrolysate. The minor amounts of impurities remaining from the raw materials were not enough to affect the quality of the final product of titanium dioxide.
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