Method for preparing high quality titanium white

A high-quality, titanium dioxide technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problem of unsatisfactory effect, unsatisfactory solid impurity and colloidal impurity removal method, solid adsorbate removal of mechanical impurities and colloidal particles. The method has no problems such as reports, and achieves the effects of eliminating negative effects, improving whiteness, and improving achromatic power.

Inactive Publication Date: 2009-02-04
PANGANG GROUP RESEARCH INSTITUTE CO LTD +2
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Problems solved by technology

[0008] However, the above methods are all to study the influence of the properties of the titanium liquid itself on the quality of the produced titanium dioxide product, and the removal methods of solid impurities and colloidal impurities in the titanium liquid are not ideal.
Though there is the report of adding settling agent to carry out sedimentation to remove colloidal particles and mechanical impurities, the effect is not ideal; but there is no report for the method of removing mechanical impurities and colloidal particles with solid adsorbent

Method used

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  • Method for preparing high quality titanium white
  • Method for preparing high quality titanium white

Examples

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Embodiment 1

[0035] To contain 74.05% TiO 2 , 10.44% SiO 2 , 7.65% TFe (full iron), 2.82% Al 2 o 3 , 1.80% MgO, 0.70% CaO and other impurities (the above are weight percentages) of high titanium slag as raw material, according to figure 2 The process flow shown in the preparation of titanium dioxide. Among them, after ore grinding, acidolysis, sedimentation, slag washing, and concentration, the concentrated titanium liquid is cooled to 20°C, and a suspension is prepared with α-type cellulose and water at a volume ratio of 1:4. , add the suspension into the funnel covered with filter paper, so that the suspension evenly forms a layer of filter cake on the filter paper, and then filter the cooled concentrated titanium solution through the filter cake in a natural state, wherein, α-type The amount of cellulose is 0.1% of the amount of hydrolyzed titanium solution. The concentrated titanium solution after fine filtration is hydrolyzed (three times) according to the hydrolysis system of t...

Embodiment 2

[0037] according to figure 2 The process flow shown for the production of titanium dioxide to contain 74.05% TiO 2 , 10.44% SiO 2 , 7.65% TFe (full iron), 2.82% Al 2 o 3 , 1.80% MgO, 0.70% CaO and other impurities (above are percentages by weight) high titanium slag as raw material, the titanium liquid after concentration is cooled to 45 ℃ situation, according to the method identical with embodiment 1 with α-type cellulose forms a filter cake, and the difference from Example 1 is that the amount of α-type cellulose is 1.2% of the amount of hydrolyzed titanium solution. Then, filter the cooled concentrated titanium solution through the filter cake in a natural state at 45±5°C. The concentrated titanium solution after fine filtration is hydrolyzed (three times) according to the hydrolysis system of the prior art, and finally No. 2 titanium dioxide product is obtained.

Embodiment 3

[0039] according to figure 2 The process flow shown for the production of titanium dioxide to contain 74.05% TiO 2 , 10.44% SiO 2 , 7.65% TFe (full iron), 2.82% Al 2 o 3 , 1.80% MgO, 0.70% CaO and high titanium slag of other impurities (the above are weight percentages) as raw material, the titanium liquid after concentration is under 80 ℃ situation, according to the method identical with embodiment 1 with α-type The cellulose forms a filter cake, and the difference from Example 1 is that the amount of α-type cellulose is 1.5% of the amount of hydrolyzed titanium solution. Then, filter the cooled concentrated titanium solution through the filter cake in a natural state. The concentrated titanium solution after the fine filtration is hydrolyzed (three times) according to the hydrolysis system of the prior art, and the No. 3 titanium dioxide product is finally obtained.

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Abstract

The invention provides a method for preparing high-quality titanium dioxide and includes the technological processes of grinding, acid decomposing, settling, residue washing, titanium liquid concentrating, hydrolyzing, washing, salt treating, calcining and crashing of raw materials containing titanium; wherein, a solid filtration medium is adopted to process concentrated titanium liquid with purifying treatment before the hydrolysis to remove colloids and solid impurities in the titanium liquid, and the colloids and solid impurities are produced in the processes of acid decomposition and concentration. As the colloids and solid impurities in the titanium liquid can be better removed with the method, both the achromic ability and whiteness of the prepared high-quality titanium dioxide are obviously improved.

Description

technical field [0001] The invention relates to the technical field of titanium dioxide production, in particular to a method for preparing high-quality titanium dioxide. Background technique [0002] In recent years, international titanium dioxide (TiO 2 ) The industry has undergone tremendous changes and is developing in the direction of high-quality titanium dioxide. Therefore, major manufacturers have continuously launched high-quality titanium dioxide products with excellent performance, and the products are shifting towards a full range of multi-functions. These functions are mainly reflected in good hiding power, high weather resistance and high dispersion. There is a certain gap between the quality of titanium dioxide products produced in my country and foreign products, so all the high-quality titanium dioxide products currently used in my country need to import titanium dioxide products produced abroad. [0003] The production technology for producing titanium di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053
Inventor 税必刚杜剑桥张天播程晓哲陈新红
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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