Process method for preparing ultra-fine high-brightness sericite powder by pyrophyllite

Abstract

The invention relates to a process method for preparing ultra-fine high-brightness sericite powder by pyrophyllite, which belongs to the chemical field. The process method comprises the following steps: crushing ore with a crusher, adding the crushed ore into a sand making machine to produce sands, feeding the sands into a rotary kiln for calcinations, cooling the calcined ore sands to the room temperature, feeding the cooled ore sands into the crusher, crushing the ore sands into fine powder, feeding the fine powder into a beater, adding sodium hydrosulfite with the weight ratio being 0.1-0.2 percent while beating with the weight ratio of the ore powder and water being 6:4, adding sodium hexametaphosphate while grinding, feeding the ground slurry into a storage tank, adding sulfuric acid according to a weight ratio, feeding the mixture into a high-pressure filter for dehydration, and drying, thereby obtaining the product. The invention has the advantages that: the ultra-fine powder product can be obtained through treatment in the method, and when the particle size is 2mu m, the product can maintain the unique and excellent laminated structure and the excellent radius-thickness ratio, thereby broadening the application scope of the pyrophyllite in high-end products, improving the value of the pyrophyllite, fully developing and utilizing pyrophyllite resources, and increasing the economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of chemical industry. Background technique [0002] my country is relatively rich in pyrophyllite resources, but the resource utilization is very low. The previous production process was mainly limited to crushing or wet processing to obtain about 400 mesh of ordinary commodities, which can only be used in building materials, refractory materials, coatings, rubber, Low-end fields such as ordinary ceramics have greatly restricted its application fields. The existing sericite powder is mainly produced by purifying mica stone as a raw material, and the process method is simple, mainly including dry crushing and wet grinding processes, and can produce products with a maximum whiteness of 1250 mesh to 2000 mesh and 85. Contents of the invention [0003] The purpose of the invention is to provide a process for preparing superfine high-whiteness sericite powder with pyrophyllite. It can produce ultra-fine powder...

AI Technical Summary

Problems solved by technology

[0002] my country is relatively rich in pyrophyllite resources, but the resource utilization is very low. The previous production process was mainly limited to crushing or wet processing to obtain about 400 mesh of ordinary commodities, which can only be used in building materials, refractory materials, coatings, rubber, Low-end fields such as ordinary ceramics greatly restrict its application fields