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Method for grinding and scattering solid particles in liquid

A technology of solid particles and liquids, applied in the direction of mixing methods, chemical instruments and methods, mixers, etc., can solve the problems of particle agglomeration, poor effect, small quantity and strength, etc.

Inactive Publication Date: 2009-08-26
初景涛 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are several problems with the use of homogenizers and sand mills in the current process: first, the grinding efficiency is low and energy consumption is high; second, the particle agglomeration is very serious, and the effect is not good even if a dispersant is added
The homogenizer often used in production can also produce cavitation, but the quantity and strength it produces are small, and the homogenizer mainly uses mechanical shear force to crush the material

Method used

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  • Method for grinding and scattering solid particles in liquid

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0008] Example 1: In the production of titanium dioxide, take 100 kilograms of titanium dioxide slurry before the sand mill, its solid content is 668g / L (TiO2), the average particle diameter D (0,9) of particle size distribution 90% is 49 μ m, add dispersant Sodium hexametaphosphate, the addition amount is 0.13%, pumped to the processing capacity of 10m under normal temperature 3 / h in the bubble generator, circulate for 2 minutes, and sample the effluent from the machine for analysis. Compared with the blank sample that did not enter the cavitation generator, the average particle size D(0,9) of 90% of the treated particle size distribution was 0.9 μm, and the particle size distribution did not change after 48 hours, while the blank sample showed obvious agglomeration after 5 minutes. The average particle diameter D(0,9) of 90% of the particle size distribution is 35 μm.

example 2

[0009] Example 2: Take 200 kilograms of common alkyd resin paint, which 100% passes through an 800 mesh sieve, and pump it to a processing capacity of 10m under normal temperature 3 In the cavitation generator of / h, the cycle operation is performed three times, and the effluent from the machine is sampled and analyzed, and its particle size is 100% through a 5000 mesh sieve.

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Abstract

The invention relates to a method for grinding and scattering solid particles in liquid. In the method, a specially designed machine is adopted for processing liquid containing solid particles; the machine generates vacuoles groups in the liquid by means of mechanical rotation, grinds the solid particles under the massive impact of the vacuole and scattering the particles in the liquid.

Description

technical field [0001] The invention relates to a process for processing solid particles in a liquid, in particular to a method for processing particles in a liquid by mechanically generating cavitation. Background technique [0002] The treatment of solid particles in liquid is a basic chemical unit operation, the main purpose is to crush solid particles and evenly disperse them in liquid. This process is widely used. For example, paints and coatings are the beating and grinding process of dispersing pigments in solvents in the production of many powders. At present, the commonly used processing technology is to process the slurry with a disperser, a ball mill, and a sand mill. However, when the solid particles are crushed, the surface energy increases, resulting in serious agglomeration. Taking the production of titanium dioxide as an example, the kiln product after titanium dioxide calcining is crushed, beaten, dispersed and ground, post-treated, and dried to become the ...

Claims

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Application Information

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IPC IPC(8): B01F3/12B01F5/16B01F25/64
Inventor 初景涛初景龙
Owner 初景涛
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