Ultrafine grinding and cooling process for producing kaolin raw material

By reducing the solid content during the ultrafine grinding of kaolin and utilizing a cooling tower, the problems of high dispersant consumption and short equipment lifespan were solved, achieving efficient ultrafine grinding and high-quality product production, reducing costs and improving product qualification rate.

CN121649030APending Publication Date: 2026-03-13内蒙古三鑫新材料科技有限公司
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Patent Information

Application Number
CN202610067301.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-19
Publication Date
2026-03-13

AI Technical Summary

Technical Problem

Existing wet processes for ultrafine grinding of kaolin suffer from problems such as high dispersant usage, short equipment lifespan, high impurity content, and low product qualification rate. In particular, under high solid content and high temperature conditions, this leads to low grinding efficiency and increased energy consumption.

Method used

By reducing the solid content of the raw slurry to 30-35%, cooling the slurry with a cooling tower after the initial wet grinding to lower the temperature to 30-45℃, and then adding a dispersant for ultrafine grinding during the subsequent wet grinding, the amount of dispersant used is reduced and the equipment life is extended, ensuring the uniformity of particle collision frequency and particle size distribution.

Benefits of technology

This approach reduces the amount of dispersant used, lowers raw material and equipment maintenance costs, increases product qualification rate to over 95%, achieves particle size D92 < 2μm, reduces impurity content, and improves product quality stability.

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Abstract

The invention discloses a superfine grinding and cooling process for producing a kaolin raw material. The superfine grinding and cooling process comprises the following steps: (1) pulping; (2) front-section wet grinding; (3) cooling: pumping the slurry A in the step (2) into a cooling tower for cooling through a slurry pump at the flow rate of 30-70m < 3 > / h to obtain slurry B with the temperature of 30-45 DEG C and the mass concentration of 35-45%; and (4) carrying out rear-section wet grinding. The superfine grinding and cooling process for producing the kaolin raw material has the beneficial effects that the particle collision requirement of superfine grinding is met, the consumption of a dispersing agent is reduced due to low temperature, the total consumption of the dispersing agent is finally reduced, the use cost of the raw material is further reduced, the service life of rear-section wet grinding equipment is prolonged, the maintenance cost is reduced, and the service life of the kaolin raw material is prolonged. And the granularity D92 of the slurry is less than 2 microns, less impurities are introduced, and the qualified rate of the product is more than 95%.
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