Process of adopting vanadium titano-magnetite or titanium middling as raw material to produce titanium dioxide

Abstract

The invention aims to overcome the defects of high energy consumption, environment pollution and low resource utilization rate in existing titanium, iron and vanadium separation and titanium dioxide powder production methods and provides a novel process of adopting vanadium titano-magnetite or titanium middling as a raw material to produce titanium dioxide. The novel process is high in operability, free of environment pollution and high in comprehensive utilization rate. The process mainly includes: utilizing potassium hydroxide and hydrochloric acid as media to produce reduced iron powder and titanium dioxide, wherein vanadium pentoxide can be extracted effectively: using vanadium titano-magnetite of Sichuan as the raw material, well mixing with potassium hydroxide, anthracite, polyvinyl alcohol and quicklime, briquetting, and reducing at 700-850 DEG C to obtain an intermediate product; smashing, grinding, performing magnetic separation, strong magnetic separation, water washing and acid leaching, hydrolyzing and calcining to obtain the reduced iron powder, vanadium pentoxide and titanium dioxide.

Description

Technical field [0001] The invention belongs to the field of mineral resources processing and the field of preparation of inorganic metal compounds, in particular to a process for producing titanium dioxide from vanadium-titanium magnetite as raw material. Background technique [0002] Reduced iron powder, vanadium pentoxide and titanium dioxide are all important industrial products. Titanium dioxide, commonly known as titanium dioxide, is a very important raw material in industrial production and is also an important raw material in chemistry. It is widely used in industries such as coatings, plastics, papermaking, printing inks, chemical fibers, rubber, cosmetics, ceramics, enamel, electronics, food and medicine. , which is non-toxic and harmless to health, is the most important white pigment, accounting for 80% of the total white pigment usage. Titanium dioxide is widely used in many fields such as modern industry, manufacturing, national defense, science and technology....

AI Technical Summary

Problems solved by technology

At present, the production methods of titanium slag used for titanium dioxide in industry mainly include sulfuric acid method and chlorination method. There are many problems, among which concentrated sulfuric acid and water consumption are high, acidolysis produces more acid gas, waste acid and waste are discharged more, and the environment is seriously polluted; the chlorination method uses chlorine gas and high-titanium slag as raw materials, and chlorine gas is highly toxic and harmful to the environment. The equipment is severely corroded, and there are also environmental hazards, which restrict the development of both

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