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A kind of method for preparing artificial rutile

An artificial rutile and leaching technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of discontinuous production of artificial rutile, low degree of automation, unstable product quality, etc., and achieve low production cost and stable product quality , the effect of high degree of automation

Active Publication Date: 2016-02-03
PANGANG GRP MINING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, domestic and foreign methods of modifying titanium ore to prepare artificial rutile have defects such as discontinuous production, low degree of automation, unstable product quality, and high production costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] After being oxidized at 960°C, the titanium concentrate reduced at 820°C is placed in the leaching bin for use. In the acid preparation tank, use concentrated hydrochloric acid and water to prepare a 22% by weight hydrochloric acid solution for use. Pump the prepared acid into the fluidized leaching circulation tank, and use an acid-resistant pump to pump the leached acid into the fluidized leaching In the reaction tower, at the beginning of the leaching operation, when the leaching acid enters the fluidized leaching reaction tower, the graphite heat exchanger is used for heating, and the steam flow is controlled to heat the leaching acid to 80°C to form a fluidized leaching bed; open the modified titanium Concentrate silo discharge valve, by controlling the opening of the discharge valve under the silo, the modified titanium concentrate feed rate is controlled to be continuously fed at 1.5 tons / hour, and the modified titanium concentrate is directly added to the fluidize...

Embodiment 2

[0052] After being oxidized at 1010°C, the titanium concentrate reduced at 860°C is placed in the leaching bin for use. In the acid mixing tank, use concentrated sulfuric acid and water to prepare a sulfuric acid solution with an acid concentration of 21% by weight for use. Pump the prepared acid into the fluidized leaching circulation tank, and use an acid-resistant pump to pump the leached acid into the fluidized leaching In the reaction tower, at the beginning of the leaching operation, the leaching acid is heated by a graphite heat exchanger during the process of entering the fluidized leaching reaction tower, and the steam flow is controlled to heat the leaching acid to 70°C to form a fluidized leaching bed; open the modified titanium Concentrate silo discharge valve, by controlling the opening of the discharge valve under the silo, the modified titanium concentrate is controlled to feed continuously at 1.5 tons / hour, and the modified titanium concentrate is directly added ...

Embodiment 3

[0055] After being oxidized at 970°C, the titanium concentrate reduced at 830°C is placed in the leaching bin for use. In the acid mixing tank, use concentrated sulfuric acid and water to prepare a sulfuric acid solution with an acid concentration of 43% by weight for use. Pump the prepared acid into the fluidized leaching circulation tank, and use an acid-resistant pump to pump the leached acid into fluidized leaching In the reaction tower, at the beginning of the leaching operation, when the leaching acid enters the fluidized leaching reaction tower, the graphite heat exchanger is used for heating, and the steam flow is controlled to heat the leaching acid to 90°C to form a fluidized leaching bed; open the modified titanium Concentrate silo discharge valve, by controlling the opening of the discharge valve under the silo, the modified titanium concentrate is controlled to feed continuously at 1.5 tons / hour, and the modified titanium concentrate is directly added to the fluidiz...

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PUM

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Abstract

An artificial rutile preparation method comprises the following steps: 1, extracting oxidation and reduction treatment modified titanium-containing material by a heated acid in a fluidized manner; 2, filtering the slurry obtained in step 1 to obtain a solid and a mother liquor; and 3, washing the solid obtained in step 2, and calcining to obtain artificial rutile, wherein the titanium-containing material is ilmenite concentrate and / or titanium slag. The method adopting a fluidizing technology to prepare the artificial rutile has the advantages of continuous production, high automation degree, stable product quality and low production cost.

Description

Technical field [0001] The invention relates to the technical field of metallurgy and chemical engineering, in particular to a method for preparing artificial rutile. Background technique [0002] Titanium dioxide scientific name titanium dioxide (TiO 2 ) It has the best opacity, whiteness and brightness, and is considered to be the most excellent white pigment in the world. Titanium dioxide is widely used in coatings, plastics, paper making, printing inks, chemical fibers, rubber, ceramics, cosmetics, food and medicine. At present, the main processes for producing titanium dioxide are sulfuric acid method and chloride method. [0003] The method for preparing titanium dioxide by sulfuric acid method has low requirements on raw materials. Therefore, Panzhihua titanium concentrate containing high calcium and high magnesium and acid-soluble titanium slag obtained by smelting them as raw materials are suitable raw materials for sulfuric acid titanium dioxide. [0004] In the chlorinat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/08
Inventor 税必刚马维平刘小兰程晓哲叶恩东龙飞虎张兴勇
Owner PANGANG GRP MINING