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Production process for increasing whiteness of titanium dioxide

A production process and technology of titanium dioxide, applied in the direction of titanium compounds, titanium dioxide, titanium oxide/hydroxide, etc., can solve problems affecting production efficiency, affecting product whiteness, troublesome solution filtration, etc., to improve processing quality and cooling efficiency high effect

Active Publication Date: 2021-06-29
江苏勃仑化学有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a production process for increasing the whiteness of titanium dioxide, which has the beneficial effect of effectively improving production efficiency without affecting the cleaning of impurities, and solves the problem of As mentioned in the above-mentioned background technology, if the stirring speed is fast, the crystal particles will be too fine, and too fine crystals will not only make the filtration of the solution more troublesome, but also prone to the problem of incomplete filtration, thus affecting the whiteness of the product; But if the stirring speed is too slow, it will affect the production efficiency

Method used

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  • Production process for increasing whiteness of titanium dioxide
  • Production process for increasing whiteness of titanium dioxide

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Embodiment 1

[0034] see Figure 1-4 , the present embodiment discloses a production process for increasing the whiteness of titanium dioxide, comprising the steps of:

[0035] S1. Raw material processing: put ilmenite into the pulverizer for pulverization, after pulverization, it will be coarsely and finely separated by air separator, and the unqualified fineness will be returned to the pulverizer for reprocessing, and the qualified powder will be transported to the silo to store;

[0036] S2. Acid hydrolysis treatment: add the powder prepared in step S1 into the acid hydrolysis tank, then add sulfuric acid with a concentration of 91%-95% into the acid hydrolysis tank, stir evenly, and then pass into the acid hydrolysis tank Steam, under the action of steam, the material undergoes an acidolysis reaction. After the acidolysis reaction, let it stand for a period of time, then add water to the acidolysis tank, and use the water to extract the material. After the extraction is completed, the ...

Embodiment 2

[0041] This embodiment discloses a device for increasing the whiteness of titanium dioxide in the production process, including a housing 1 and a liquid storage tank 2, the housing 1 is cylindrical, the liquid storage tank 2 is located on the lower side of the housing 1, and the liquid storage tank 2 A circulation pump 3 is provided inside, a liquid outlet pipe 4 is provided at the upper end of the liquid storage tank 2, and the bottom end of the liquid outlet pipe 4 communicates with the liquid outlet of the circulation pump 3;

[0042] Several circulating cooling assemblies are provided on the liquid outlet pipe 4, and the circulating cooling assembly includes a first processing disk 5 and a second processing disk 6, the first processing disk 5 and the second processing disk 6 are all in the shape of a cone, and the first processing disk The disk 5 and the second processing disk 6 are arranged as mirror images of each other, the outside of the first processing disk 5 is provi...

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Abstract

The invention relates to the technical field of titanium dioxide processing, and discloses a production process for increasing the whiteness of titanium dioxide. Equipment used in the process comprises a shell and a liquid storage tank, wherein the shell is cylindrical, the liquid storage tank is located on the lower side of the shell, a circulating pump is arranged in the liquid storage tank, and a liquid outlet pipe is arranged at the upper end of the liquid storage tank. According to the invention, a first treatment disc and a second treatment disc are arranged on the upper side of the liquid storage tank, a solution in the liquid storage tank can be conveyed to a high position through the circulating pump, then the solution sequentially flows through the first treatment disc and the second treatment disc, and the first treatment disc and the second treatment disc both communicate with circulating cooling water, so the solution flowing through the treatment discs can be cooled. According to a technical scheme in the invention, the solution is cooled in a circulating flow mode; and compared with traditional stirring cooling, cooling efficiency is high, the influence on the particle size of crystals is small, later filtering becomes more convenient, and the processing quality of products is effectively improved.

Description

technical field [0001] The invention relates to the technical field of titanium dioxide processing, in particular to a production process for increasing the whiteness of titanium dioxide. Background technique [0002] Titanium dioxide is a white pigment with excellent performance, widely used in coatings, plastics, papermaking, printing ink, chemical fiber, rubber, cosmetics and other industries. There are many factors affecting the whiteness of titanium dioxide, including mineral sources, equipment and key technologies. Usually, as the production technology of titanium dioxide by sulfuric acid method, a large part is the process of removing impurities. The content and type of trace harmful impurities are the key factors affecting the whiteness of the product. In the production process of titanium dioxide by sulfuric acid method, the cooling crystallization method is commonly used To remove ferrous sulfate in titanium liquid, the principle is: "First reduce the solubility o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053C01G49/14C01G23/00B01D9/02B01D36/00
CPCC01G23/0532C01G49/14C01G23/008B01D9/0013B01D36/00B01D2009/0086
Inventor 宦益宏
Owner 江苏勃仑化学有限公司
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