Meta titanate treatment method

A treatment method and technology of metatitanate, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of increasing the calcination temperature and time, the hardness of titanium dioxide particles, and increasing the cost of exhaust gas treatment, so as to reduce the calcination temperature and reduce the calcination temperature. Low oil absorption, stable and complete effect of crystal growth and transformation

CN103241770AInactive Publication Date: 2013-08-14LOMON BILLIONS GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2013-08-14
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention relates to a meta titanate treatment method, comprising the following steps of: pulping metatitanic acid; adding an alkaline compound into the metatitanic acid pulp until the pH value is above 3; filtering and washing; adding dissoluble aluminum salt, dissoluble phosphate, dissoluble potassium-containing compounds and zinc-containing compounds into a filter cake and mixing uniformly; and calcining and crushing to obtain titanium dioxide. Compared with the prior art, the meta titanate treatment method provided by the invention has the advantages that the energy consumption is reduced; the production efficiency is improved; and the mellowness of the titanium dioxide is improved.
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Description

technical field

[0001] The invention relates to a method for treating metatitanate, belonging to the field of titanium dioxide production. Background technique

[0002] The traditional metatitanate treatment method is to add salt treatment agents, such as aluminum salt, phosphate, potassium salt, zinc salt, antimony salt, etc., after making metatitanic acid into pulp, and then calcining to obtain titanium dioxide after filtration. This metatitanate treatment method has high calcining temperature, long time, high energy consumption and low pigment performance.

[0003] Metatitanic acid is directly calcined after bleaching. In the process of crystal growth and stabilization, accompanied by dehydration and desulfurization, the process is difficult to control, and the obtained titanium dioxide particles are very hard, which is not conducive to post-processing sand milling. Desulfurization in the process of calcining metatitanic acid increases the cost of tail gas treatment, and...

Examples

Embodiment 1

[0026] The salt treatment method of metatitanic acid comprises the following steps in turn:

[0027] 1) Slurry metatitanic acid with a slurry concentration of 50g / L;

[0028] 2) Add alkaline compounds to the metatitanic acid slurry to adjust the pH of the slurry to 3;

[0029] 3) Filtration and washing;

[0030] 4) Filter cake pulping;

[0031] 5) Add soluble aluminum salt to the filter cake, the amount of soluble aluminum salt is calculated as aluminum sulfate, and the weight of aluminum sulfate is 0.1% of the content of titanium dioxide;

[0032] 6) Add soluble phosphate to the filter cake, the amount of soluble phosphate is calculated as phosphoric acid, and the weight of phosphoric acid is 0.1% of the content of titanium dioxide;

[0033] 7) Add soluble potassium-containing compounds to the filter cake, the amount of soluble potassium-containing compounds is calculated by potassium hydroxide, and the weight of potassium hydroxide is 0.1% of the content of titanium dioxi...

Embodiment 2

[0038] The salt treatment method of metatitanic acid comprises the following steps in turn:

[0039] 1) Slurry metatitanic acid with a slurry concentration of 100g / L;

[0040] 2) Add alkaline compounds to the metatitanic acid slurry to adjust the pH of the slurry to 5;

[0041] 3) Filtration and washing;

[0042] 4) Filter cake pulping;

[0043] 5) Add soluble aluminum salt to the filter cake, the amount of soluble aluminum salt is calculated as aluminum sulfate, and the weight of aluminum sulfate is 0.2% of the content of titanium dioxide;

[0044] 6) Add soluble phosphate to the filter cake, the amount of soluble phosphate is calculated as phosphoric acid, and the weight of phosphoric acid is 0.2% of the content of titanium dioxide;

[0045] 7) Add soluble potassium-containing compounds to the filter cake, the amount of soluble potassium-containing compounds is calculated as potassium hydroxide, and the weight of potassium hydroxide is 0.2% of the content of titanium diox...

Embodiment 3

[0050] The salt treatment method of metatitanic acid comprises the following steps in turn:

[0051] 1) Slurry metatitanic acid with a slurry concentration of 200g / L;

[0052] 2) Add alkaline compounds to the metatitanic acid slurry to adjust the pH of the slurry to 7;

[0053] 3) Filtration and washing;

[0054] 4) Filter cake pulping;

[0055] 5) Add soluble aluminum salt to the filter cake, the amount of soluble aluminum salt is calculated as aluminum sulfate, and the weight of aluminum sulfate is 0.4% of the content of titanium dioxide;

[0056] 6) Add soluble phosphate to the filter cake, the amount of soluble phosphate is calculated by phosphoric acid, and the weight of phosphoric acid is 0.4% of the content of titanium dioxide;

[0057] 7) Add soluble potassium-containing compounds to the filter cake, the amount of soluble potassium-containing compounds is calculated by potassium hydroxide, and the weight of potassium hydroxide is 0.4% of the content of titanium diox...