Research on the Process Technology for Preparing Trivalent Titanium from Hydrolysis Scale Generated in the Production of Titanium Dioxide by Sulfuric Acid Method
In the hydrolysis process of titanium dioxide production by sulfuric acid method,hydrolysis solid substances(waste solid residue)——hydrolysis scale are generated in the hydrolysis pot,which accounts for 0.3%to 0.5%of the total production of titanium dioxide.The structure is hard,the iron content is high,and there are many silicon/calcium impurities,which cannot be recycled.By analyzing the properties of hydrolysis scale,a recycling technology route of"wet ball milling depolymerization rinsing purification acid dissolution reduction to produce trivalent titanium"is proposed,achieving high efficiency and high-quality recycling of hydrolysis scale,achieving the same rinsing effect and equivalent economic value as normal metatitanic acid.This technology not only solves the problem of waste solid treatment in the production process of titanium dioxide,but also generates economic benefits.It is of great significance for the development and improvement of clean production technology for sulfuric acid based titanium dioxide,and has certain industry promotion value.
hydrolyzed scalewet ball millingdisaggregationpurificationacid dissolution reductionrecycling and utilizationtrivalent titanium
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