Comprehensive Utilization of By-product Iron(Ⅱ)Sulfate of Titanium Dioxide
The sulfuric acid process and the chlorination process are two kinds of preparation processes of titanium dioxide,the application degree and range are different in our country,the sulfuric acid process is the mainstream production process in our country.A large amount of waste gas,waste water,waste residue and by-products are produced by the sulfuric acid process,which causes serious pollution to the environment.Ferrous sulfate,as the main by-product of titanium dioxide preparation process by sulfuric acid process,its proper treatment and utilization will get high economic value and environmental benefits.Based on the differences of the two preparation processes,the advantages and disadvantages of proces-ses were compared in this paper,the comprehensive utilization of ferrous sulfate as a by-product of sulfuric acid process was summarized,inclu-ding direct sales use and post-processing sales use,and the future development of titanium dioxide was prospected.
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