Preparation method for producing titanium dioxide from titanium liquid with poor clarity and titanium dioxide

Abstract

The invention discloses a preparation method for producing titanium dioxide from a titanium solution with poor clarity and titanium dioxide. The preparation method comprises the following steps: S1, adding a seed crystal into the titanium solution to be hydrolyzed, stirring, heating to boil, and adding dilute acid when the titanium solution is light gray; s2, continuing to preserve heat, adding hot water to preserve heat when the titanium liquid is whitened, and hydrolyzing to prepare titanium dioxide; in the step S1, when the solid content of the titaniferous solution to be hydrolyzed is greater than 20 mg / L and less than or equal to 40 mg / L, the adding amount of the seed crystal is 0.8-1.0%; when the solid content of the titaniferous solution to be hydrolyzed is greater than 40 mg / L and less than or equal to 50 mg / L, the addition amount of the seed crystal is 1.1-1.3%; when the solid content of the titaniferous solution to be hydrolyzed is greater than 50mg / L, the adding amount of the seed crystal is greater than or equal to 1.4%. The hydrolysis material prepared by the method is uniform in particle size, good in metatitanic acid hydrolysis quality of the titaniferous solution and short in washing time; the titanium dioxide is good in quality whiteness and brightness and high in fading power. And the sanding effect of the calcined crude product is good.

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