A method for stabilizing and regulating a low-iron-titanium-ratio sulfuric acid method titanium dioxide hydrolysis process
By adjusting the iron-to-titanium ratio of the titanium liquid, the TiO2 concentration, and the F value, and by optimizing the parameters of hydrolysis and subsequent processes, the imbalance problem of the sulfuric acid process for titanium dioxide hydrolysis under low iron-to-titanium ratio was solved, and the production of by-products and the stability of product quality were achieved. This method is suitable for existing industrial production lines.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHONGQING TITANIUM IND OF PANGANG GROUP
- Filing Date
- 2026-05-08
- Publication Date
- 2026-07-17
AI Technical Summary
Under low iron-to-titanium ratio conditions, the sulfuric acid process for titanium dioxide hydrolysis becomes unbalanced, resulting in larger particle size and abnormal water washing sedimentation height, which affects the stability of subsequent processes and the quality of titanium dioxide products. Furthermore, there is a lack of effective parameter control methods.
By directionally adjusting the iron-to-titanium ratio of the titanium liquid to 0.24-0.26, the TiO2 concentration and F value of the titanium liquid are precisely controlled. An external seed crystal hydrolysis process at atmospheric pressure is adopted, the holding time of the first boiling point of hydrolysis and the amount of dilution water are adjusted, and the parameters of water washing, bleaching, salt treatment and calcination processes are optimized to ensure the stability of hydrolysis particle size and sedimentation height.
On the existing production line, the production of ferrous sulfate heptahydrate byproduct was increased, the hydrolysis particle size and water washing sedimentation height were stably controlled, and the rutile conversion rate in the rotary kiln reached over 98.5%, ensuring the quality and stability of titanium dioxide products.
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