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Efficient sulfuric acid method titanium dioxide acidolysis process

A technology of sulfuric acid method and titanium dioxide, which is applied in the direction of titanium dioxide, titanium compounds, chemical instruments and methods, etc., can solve the problems of large influence of leaching conditions, influence of leaching rate, and low production efficiency, so as to save sulfuric acid consumption and improve Acid hydrolysis production capacity, the effect of realizing environmental protection production

Inactive Publication Date: 2020-02-11
SICHUAN LOMON TITANIUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The leaching of acid solution material is the dissolving process of titanyl sulfate, and this process is greatly affected by the leaching conditions. At present, titanium dioxide production enterprises only carry out simple leaching by slowly adding leaching water. This method not only leaches The extraction cycle is long, the production efficiency is low, and the leaching rate will be affected to a certain extent. Therefore, strengthening the leaching conditions is very important to increase the acid hydrolysis capacity

Method used

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  • Efficient sulfuric acid method titanium dioxide acidolysis process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Select 30 tons of titanium concentrate with a particle size of less than 0.075mm and less than 0.0374mm and a particle size ratio of 80wt%; add sulfuric acid for acidolysis with an acid-mineral ratio of 1.55, and obtain an acidolysis solid phase; The solution solid phase (temperature is 85 ℃) leaching, the addition rate of leaching water is 100m³ / h; after adding leaching water, add 3m³ of titanium dioxide waste acid to get F value of 1.85; ultrasonic power is 1000W, time is 90min, and then The leaching slurry is beat to the settlement section, the acid hydrolysis rate is 97.3%, and the acid hydrolysis cycle is calculated.

Embodiment 2

[0024] Select 30 tons of titanium concentrate with a particle size of less than 0.075mm and less than 0.0374mm and a particle size ratio of 85wt%; add sulfuric acid for acidolysis with an acid-mineral ratio of 1.6 to obtain an acidolysis solid phase; The leaching of the solid phase (at a temperature of 90°C), the addition rate of the leaching water is 120m³ / h; after adding the leaching water, add 5m³ of titanium dioxide waste acid to obtain an F value of 1.98; the ultrasonic power is 3000W, and the time is 120min, and then the leaching Take the slurry and beat it to the settlement section, the acid hydrolysis rate is 97.6%, and the acid hydrolysis cycle is calculated.

Embodiment 3

[0026] Select 30 tons of titanium concentrate with a particle size of less than 0.075mm and less than 0.0374mm and a particle size of less than 0.0374mm. The leaching of the solid phase (at a temperature of 85°C), the addition rate of the leaching water is 110m³ / h; after the leaching water is added, 4m³ of titanium dioxide waste acid is added to obtain an F value of 1.90; the ultrasonic power is 2000W, and the time is 110min, and then the The leaching slurry is beaten to the settlement section, the acid hydrolysis rate is 97.1%, and the acid hydrolysis cycle is calculated.

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Abstract

Belonging to the technical field of titanium dioxide production, the invention discloses an efficient sulfuric acid method titanium dioxide acidolysis process. The process includes the steps of: 1) selecting titanium concentrate with granularity of less than 0.075mm, and performing acidolysis according to an acid-ore ratio of 1.55-1.6 to obtain an acidolysis solid-phase substance; and (2) under the ultrasonic action, adding leaching water into the acidolysis solid-phase substance for leaching, controlling the adding speed of the leaching water at 100-120m<3> / h, and then replenishing titanium dioxide waste acid to an F value of 1.8-2.0, thus obtaining a leaching slurry. By increasing the adding rate of leaching water and adopting ultrasonic assisted reinforcement during solid-phase substance leaching, the acidolysis leaching period is shortened, and the acidolysis production capacity is improved; meanwhile, by reducing the acidolysis acid-ore ratio and replenishing the waste acid, resource utilization of the waste acid is achieved, and sulfuric acid resources are saved, therefore efficient, energy-saving, clean and environment-friendly production is achieved.

Description

technical field [0001] The invention belongs to the technical field of titanium dioxide production, and in particular relates to an acidolysis process of high-efficiency sulfuric acid method titanium dioxide. Background technique [0002] Titanium dioxide is widely used in many fields, such as coatings, inks, plastics, rubber, paper, ceramics and synthetic fibers, for its non-toxicity, best opacity, best whiteness and brightness, and good hiding power and coloring power. industry. At present, my country's titanium dioxide is mainly produced by the sulfuric acid method. [0003] The acid hydrolysis process is one of the core processes in the production of sulfuric acid titanium dioxide. The acid hydrolysis process is the process of converting iron metatitanate in titanium concentrate into titanyl sulfate and iron salts. The leaching of acid solution material is the dissolving process of titanyl sulfate, and this process is greatly affected by the leaching conditions. At pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053
CPCC01G23/0532
Inventor 曹鹏张玉荣周春勇吴彭森和奔流任桂龙陈翔
Owner SICHUAN LOMON TITANIUM IND CO LTD