Method for preparation of coal water slurry or water coke slurry by two-stage dosing

Abstract

The invention discloses a method for preparation of a coal water slurry or water coke slurry. The method comprises: adding a naphthalene sulfonic acid formaldehyde copolymer, a naphthalene anthracene sulfonic acid formaldehyde copolymer, lignosulfonate and a humate into the feeding end of a mill for grinding coal, petroleum coke or mixed raw materials, with the adding amount accounting for 0.1-1.0% of the total weight of the slurry; and adding hexametaphosphate, sulfonated acetone-formaldehyde copolymer or a polyacrylate at the discharge end of the mill, with the adding amount accounting for 0.02-0.2% of the total weight of the slurry. The stage dosing for preparation of the slurry can improve the ore grinding properties of the mill, broaden the particle size distribution of the slurry, improve the concentration and stability of the slurry, reduce the viscosity of the slurry, and improve the fluidity of the slurry. The method has a stabilizing effect on multiple slurries, can improve slurry stability, adjust slurry particle size distribution, increase slurry concentration, reduce slurry viscosity and enhance mobility. With the advantages of convenient operation, small dosage and low cost, the method has high popularization and application value.

Description

Technical field [0001] The invention relates to a method for producing slurry by two-stage dosing, especially for producing coal water slurry and water coke slurry. Background technique [0002] Paste materials have been widely used in more and more fields and have received increasing attention. However, since the slurry material is a solid and liquid two-phase dispersion system, the quality of the slurry is closely related to the grinding process of the slurry during manufacture, and the particle size distribution and viscosity of the solid particles in the slurry should be considered at the same time. Balance between slurry stability and slurry stability. Commonly used methods to improve slurry include improving dispersant performance, additive stabilizer, and adopting different grinding combinations. However, these methods have problems such as high cost and increased process complexity. , There is no better economy, which reduces the reliability of the system. Chinese inven...

AI Technical Summary

Problems solved by technology

[0003] To sum up, the above methods all regard coal as a uniform and stable substance, without considering the changes in the particle size of raw materials such as coal and the dissociation of different components of coal during the grinding process, and it is difficult to solve the problem of simultaneous grinding on one mill. Improve particle size distribution, adjust viscosity, economically applicable additives and other issues

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