A kind of preparation method of superfine kaolin with high oil absorption value

Abstract

The invention discloses a preparation method for high-oil-factor ultra-fine kaolin. The preparation method comprises the following steps of (1) drying kaolin raw ores in a drying box, and then smashing the kaolin raw ores; (2) mixing the smashed kaolin and water to obtain serous fluid, adding sodium dithionite and sodium polyacrylate in the serous fluid, electrically stirring the mixture at normal temperature, then adding sulfuric acids or hydrochloric acids and hydrogen peroxide in the mixture, and continuing stirring the mixture intensely; (3) pumping the serous fluid prepared from the step (2) in a grinding mill, grinding the serous fluid, and adding sodium dodecyl sulfate in the serous fluid in a grinding process; (4) performing solid and fluid separation on the serous fluid prepared from the step (3) by using a filter press to obtain filter cakes; (5) drying and distributing the filter cakes, and spraying the filter cakes by using a spraying machine to obtain kaolin raw powder; and (6) scattering and roasting the kaolin raw powder, annealing naturally, cooling the roasted kaolin powder at normal temperature, and scattering the kaolin powder to obtain the high-oil-factor ultra-fine kaolin products. In a preparation process, screen tailings of the products do not exceed standards, the obtained products is non-corrosive, is low in viscosity, and can be scattered in liquor easily.

Description

technical field [0001] The invention relates to a preparation method of superfine kaolin with high oil absorption value, in particular to a preparation method of superfine kaolin with high oil absorption value that is non-corrosive, low in viscosity and easy to disperse in a solution. Background technique [0002] As an industrial mineral with excellent performance, kaolin is widely used in dozens of industries such as papermaking, paint, ceramics, rubber, chemical industry, medicine, and national defense. In recent years, the beneficiation process of kaolin has been continuously improved, its application value has been further developed, and its application fields have become more extensive. The application market of kaolin is very scattered, and the more developed the economy, the greater the usage of kaolin. Kaolin in the international market is basically supplied by the United States, Brazil, the United Kingdom, and Australia, and only a small amount of kaolin raw mater...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a method for preparing superfine kaolin with high oil absorption value. Defects, reduce imports and exports, save and make full use of existing resources, and meet the refinement requirements of modern industry for kaolin powder as much as possible

During the preparation process of this method, the sieve residue of the product will not exceed the standard, and the obtained product is non-corrosive and has low viscosity and is easy to disperse in the solution.