Method for reducing viscosity of titanium dioxide slurry

A technology of titanium dioxide and slurry viscosity, which is applied in the direction of grain processing, etc., to achieve the effect of improving sanding efficiency, reducing viscosity, and broad application prospects

Active Publication Date: 2016-09-07
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] And how to start from the intrinsic characteristics of titanium dioxide particles, increase the concentration of titanium dioxide slurry, and further reduce its viscosity, there is no relevant report

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Start the roller press mill, send the primary product of calcined titanium dioxide into the roller press mill, the feed rate of the roller press mill is 4.5t / h, and the distance between the rollers of the roller press mill is 0.6mm. Standard sieve, the sieve residue control range is 10%. The material on the sieve is returned to the roller press mill for re-grinding, the material under the sieve is beaten and dispersed by a high-speed dispersion system, and 3.0‰ monoisopropanolamine and desalted water are added for beating and dispersion, so that the slurry concentration is 650g / L. The dispersed slurry is pumped into a sand mill for sand grinding to obtain a titanium dioxide slurry. After sanding, the viscosity was measured by Brookfield rotational viscometer to be 120cP, and the particle size D50 of the slurry was measured by Malvern 2000 laser particle size analyzer to be 0.38μm.

Embodiment 2

[0045]Start the roller press mill, send the primary product of calcined titanium dioxide into the roller press mill, the feed rate of the roller press mill is 5.0t / h, and the distance between the rollers of the roller press mill is 0.9mm, after the first product is ground by the roller press mill, it passes through a 60-mesh Standard sieve, the sieve residue control range is 15%. The material on the sieve is returned to the roller press mill for regrinding, the material under the sieve is beaten and dispersed by a high-speed dispersion system, and 2.7‰ sodium silicate and desalted water are added for beating and dispersion, so that the slurry concentration is 620g / L. The dispersed slurry is pumped into a sand mill for sand grinding to obtain a titanium dioxide slurry. After sanding, the viscosity was measured to be 68cP by Brookfield rotational viscometer, and the particle size D50 of the slurry was measured to be 0.35μm by Malvern 2000 laser particle size analyzer.

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Abstract

The invention relates to a method for reducing viscosity of titanium dioxide slurry, and belongs to the technical field of production of titanium dioxide. The technical problem to be solved by the invention is to provide the method for reducing the viscosity of the titanium dioxide slurry. The method grinds a raw product of titanium dioxide to reach a fineness of not more than 40 meshes, and performs the pulping dispersion. The method can screen and classify grinded materials through controlling related process parameters of rolling, pressing and milling, changes the fineness of pulping materials to increase the concentration of the titanium dioxide slurry and to reduce the viscosity thereof, improves the quality of the titanium dioxide slurry, improves the grinding efficiency, and improves the abrasive material quality and the final product quality. The method is simple in operation, high in implementability, capable of not changing traditional medium powder equipment, suitable for popularization and broad in application prospect.

Description

technical field [0001] The invention relates to a method for reducing the viscosity of titanium dioxide slurry, and belongs to the technical field of titanium dioxide production. Background technique [0002] Due to titanium resource endowment, technology, equipment and other reasons, 98% of domestic enterprises use sulfuric acid method to produce titanium dioxide. In the process of preparing titanium dioxide by sulfuric acid method, before surface treatment (coating) of titanium dioxide, the calcined primary product of titanium dioxide needs to be pulverized and beaten. That is, the "medium powder" process, so that it can meet the requirements of surface treatment. In the production of sulfuric acid titanium dioxide in China, there are many medium powder processes. Typical process combinations include "roller mill + high-speed dispersion (wet ball mill) + sand mill", "Raymond + beating + sand mill", etc., among which Due to the lower investment and operating costs and bet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C4/02B02C4/32B02C23/16B02C21/00
CPCB02C4/02B02C4/32B02C21/00B02C23/16B02C2023/165
Inventor 罗志强王斌王海波
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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