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Method for preparing titanium dioxide from high-acidity high-silicon-content titaniferous solution

A technology of titanium dioxide and acidity value, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of silicon content in titanium liquid and high acidity value hydrolysis process, etc., achieve low price, wide source, reduce acidity value and silicon content Effect

Pending Publication Date: 2021-02-02
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to solve the problem that the silicon content and acidity value of titanium liquid obtained after acidolysis of non-blast furnace titanium slag obtained by non-blast furnace smelting with vanadium-titanium magnetite as the main raw material cannot be directly used in the hydrolysis process. Provided is a method for preparing titanium dioxide from titanium liquid with high acidity value and high silicon content,

Method used

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  • Method for preparing titanium dioxide from high-acidity high-silicon-content titaniferous solution
  • Method for preparing titanium dioxide from high-acidity high-silicon-content titaniferous solution
  • Method for preparing titanium dioxide from high-acidity high-silicon-content titaniferous solution

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Effect test

Embodiment 1

[0032] Slowly add the weighed additive into the water, start stirring at the same time, stir the suspension evenly, the additive mass concentration in the suspension is 30%, then add the suspension into the original titanium liquid until the acidity value of the original titanium liquid drops to 1.83, add After the completion, keep the temperature at 60°C, keep the temperature for 30 minutes, and then cool the titanium liquid at room temperature. During the cooling process, there will be precipitation gradually. After cooling, filter to obtain the filter residue and filtrate. The filtrate is the titanium liquid for subsequent hydrolysis. Add trivalent titanium to the solution to make the mass concentration of trivalent titanium in the titanium solution reach 1.5%, and then hydrolyze it to obtain metatitanic acid by a known titanium solution hydrolysis method. Other conditions in the hydrolysis process are: TiO 2 With a concentration of 187g / L, the obtained metatitanic acid is b...

Embodiment 2

[0036] Slowly add the weighed additive into the water, start stirring at the same time, stir the suspension evenly, the mass concentration of the additive in the suspension is greater than 30%, then add the suspension to the original titanium liquid until the acidity value of the original titanium liquid drops to 1.93, After the addition, keep the temperature at 65°C, keep the temperature for 30 minutes, and then cool the titanium solution at room temperature. During the cooling process, precipitation gradually occurs. After cooling, filter to obtain the filter residue and filtrate. The filtrate is the titanium solution for subsequent hydrolysis. Trivalent titanium is added to the titanium liquid to make the mass concentration of trivalent titanium in the titanium liquid reach 1.0%, and then the metatitanic acid is obtained by hydrolyzing the known titanium liquid hydrolysis method. Other conditions in the hydrolysis process are: TiO 2With a concentration of 197g / L, the obtaine...

Embodiment 3

[0040] Slowly add the weighed additive into the water, start stirring at the same time, stir the suspension evenly, the mass concentration of the additive in the suspension is greater than 30%, then add the suspension to the original titanium liquid until the acidity value of the original titanium liquid drops to 2.03, After the addition, keep the temperature at 60°C, keep the temperature for 30 minutes, and cool the titanium liquid at room temperature. During the cooling process, precipitation gradually precipitates. After cooling, filter to obtain the filter residue and filtrate. The filtrate is the titanium liquid for subsequent hydrolysis. Trivalent titanium is added to the titanium liquid to make the mass concentration of trivalent titanium in the titanium liquid reach 1.5%, and then the metatitanic acid is obtained by hydrolyzing the known titanium liquid hydrolysis method. Other conditions in the hydrolysis process are: TiO 2 With a concentration of 177g / L, the obtained ...

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Abstract

The invention discloses a method for preparing titanium dioxide from titaniferous solution with high acidity value and high silicon content, and belongs to the technical field of titanium dioxide production. According to the method, the titaniferous solution with high acidity value and high silicon content is used as a raw material, the acidity value and silicon content of the titaniferous solution are reduced by adding quick lime or slaked lime, and the purity of metatitanic acid serving as a titaniferous solution hydrolysate is improved, so that the purity of titanium dioxide serving as a final product is improved. The process is mainly characterized in that quick lime or slaked lime is used as an additive for reducing the acidity value and the silicon content of the titaniferous solution to generate a large number of columnar calcium sulfate crystals, a large number of chippy silicon dioxide can be attached to the surface to be removed, meanwhile, the purpose of reducing the acidityvalue and the silicon content of the titaniferous solution is achieved, and quick lime and slaked lime are low in price and wide in source. Therefore, the method is an economical and simple method for preparing titanium dioxide.

Description

technical field [0001] The invention relates to a method for preparing titanium dioxide from titanium liquid with high acidity value and high silicon content, and belongs to the technical field of titanium dioxide production. Background technique [0002] my country's vanadium-titanium magnetite is widely distributed, with resource reserves exceeding 10 billion tons, of which 9.83 billion tons have been proven reserves. Most of the vanadium-titanium magnetite is distributed in basic rock mass, mainly in Panxi, Sichuan -Xichang) region, Chengde, Hebei, Yangxian, Shaanxi, Yunyang, Hubei, Xiangyang, Linyi, Shandong, Xingning, Guangdong and other regions. Among them, the Panxi area is the main metallogenic belt of vanadium-titanium magnetite in my country and one of the important production areas of similar deposits in the world. According to the latest exploration results, the cumulative proven resource reserves of vanadium-titanium magnetite in Panzhihua reach 7.337 billion Ton...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053C01G23/08C01G23/04
CPCC01G23/053C01G23/08C01G23/04C01P2006/80
Inventor 聂文林张谦文书明韩广崔传发丰奇成吕超刘俊伯周耀文白旭方健王涵张松
Owner KUNMING UNIV OF SCI & TECH
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