Preparation method of highly-dispersed titanium pigment

A high-dispersion technology of titanium dioxide, which is applied in the field of titanium dioxide, can solve the problems of affecting the dispersion of products and increasing costs, and achieve the effect of reducing the cost of steam powder and improving the dispersion

Inactive Publication Date: 2018-08-10
SICHUAN LOMON TITANIUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the previously formed agglomerates are not dispersed before the titanium dioxide slurry is dried, and high-intensity jet milling is not adopted, it will affect the dispersion of the pro

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Abrasive slurry with a concentration of 100g / L is coated with single aluminum inorganic coating. After the coating is completed, wash until the resistivity is ≥ 60Ω·m, and then re-pulp to a concentration of 50g / L, and add 0.1wt% TMP (mass fraction of titanium dioxide), and then ultrasonically dispersed for 3 minutes. After the ultrasonic dispersion is completed, dry and steam powder, the TMP added to the steam powder is 0.1wt% (mass fraction of titanium dioxide), and the gas-solid ratio is 1:1 (ratio to titanium dioxide).

Embodiment 2

[0019] Abrasive slurry with a concentration of 200g / L is coated with silicon-aluminum inorganic coating. After the coating is completed, wash until the resistivity is ≥60Ω·m, and then re-pulp to a concentration of 100g / L, and add 0.2wt% TMP (mass fraction of titanium dioxide), and then ultrasonically dispersed for 30 minutes. After the ultrasonic dispersion is completed, dry and steam powder, the TMP added to the steam powder is 0.2wt% (mass fraction of titanium dioxide), and the gas-solid ratio is 2:1 (ratio to titanium dioxide).

[0020] Inorganic coatings include the following types: single aluminum coating, silicon-aluminum coating, zirconium-aluminum coating, cerium-phosphorus-aluminum coating, and titanium-aluminum coating.

Embodiment 3

[0022] Abrasive slurry with a concentration of 400g / L is coated with zirconium-aluminum inorganically. After the coating is completed, it is washed until the resistivity is ≥ 60Ω·m, and then re-pulped to a concentration of 200g / L, and 0.3wt% TMP is added. (mass fraction of titanium dioxide), and then ultrasonically dispersed for 60 minutes. After the ultrasonic dispersion is completed, dry and steam powder, the TMP added to the steam powder is 0.3wt% (mass fraction of titanium dioxide), and the gas-solid ratio is 3:1 (ratio to titanium dioxide).

[0023] The inorganic coating in Examples 1-3 can also be cerium phosphorous aluminum coating or titanium aluminum coating.

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PUM

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Abstract

The invention relates to a preparation method of a highly-dispersed titanium pigment. The preparation method comprises the following steps of 1), inorganically enveloping the sand-ground slurry of a titanium pigment, washing enveloped slurry, and then pulping anew, so as to obtain thinned slurry; 2), adding TMP into the thinned slurry for the first time, and ultrasonically dispersing for a periodof time, so as to obtain dispersed slurry; 3), drying the dispersed slurry, and steam-grinding to obtain the highly-dispersed titanium pigment, wherein the TMP is added for the second time during steam grinding. The method provided by the invention can be used for completely avoiding the formation of an aggregate before the slurry of the titanium pigment is dried; thus, the dispersity of the titanium pigment is improved; the grinding can be carried out by adopting a lower-intensity gas stream, and the steam grinding cost is decreased.

Description

technical field [0001] The invention relates to a preparation method of highly dispersed titanium dioxide, which belongs to the technical field of titanium dioxide. Background technique [0002] Titanium dioxide used as a pigment has excellent optical properties and stable chemical properties. Titanium dioxide requires good dispersion in different coating systems. Therefore, titanium dioxide has very high requirements on particle size and particle size distribution. Regardless of the production process of sulfuric acid titanium dioxide or chloride titanium dioxide, the crude titanium dioxide usually needs to be dispersed and ground to break up the agglomerates and sintered particles, and then diluted to a certain concentration before inorganic coating. Inorganic surface treatment agent, then washed, dried and jet milled. Any agglomerates formed before drying will become stronger during the drying stage, requiring high-intensity energy to break the agglomerates to the requ...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/04C09C3/06C09C3/08
CPCC09C1/3692C01P2006/22C09C3/003C09C3/006C09C3/04C09C3/043C09C3/045C09C3/063C09C3/08
Inventor 张玉荣刘不尽周春勇孙润发姚恒平朱全芳
Owner SICHUAN LOMON TITANIUM IND CO LTD
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