A grinding method for high-quality synthetic mica

Abstract

The invention discloses a grinding method for high-quality synthetic mica, which comprises the following steps: a. crushing: crushing mica fragments into 200-2000 μm mica flakes by ultra-high pressure hydraulic power; b. separation: putting mica flakes into a centrifuge c, grinding: select grinding equipment, put into grinding media or grinding aids, put into mica flakes, control moisture, after grinding for 3-8 hours, form mica powder for slurrying, unloading ; d. Sedimentation: Slurry the ground mica powder, and separate mica powder products of various particle sizes through hydraulic sedimentation. The advantage is that: the present invention crushes the mica fragments by ultra-high pressure hydraulics, grinds them into a slurry through a stirring mill and mixes grinding media and grinding aids, and then obtains mica powder products of various particle sizes through the hydraulic sedimentation method, and the grinding process Mica has no damage, no dust escape, has the advantages of less regrinding, high quality, energy saving and environmental protection.

Description

technical field [0001] The invention relates to the technical field of mica powder production, in particular to a grinding method for high-quality synthetic mica. Background technique [0002] As a new type of decorative pigment, pearlescent pigments are widely used in many fields such as coatings, plastics, rubber, inks, leather, paper, ceramics, cosmetics, printing and dyeing. With good whiteness, good brightness and high chemical stability, it gradually replaces natural mica flakes and becomes an important material for the production of mica titanium pearlescent pigments. [0003] The grinding methods of synthetic mica powder are divided into wet method and dry method. The production of pearlescent pigments requires mica powder to be ground by a wet method. The wet-ground mica has a smooth surface, a large diameter-to-thickness ratio, and a relatively pure texture, which is conducive to the coating of metal oxides. [0004] At present, the grinding of artificially synth...

AI Technical Summary

Problems solved by technology

[0005] 1. Grinding is difficult and costly: the hardness of synthetic mica is higher than that of natural mica, and it is difficult to be ground. After grinding, there are many return pieces and fine powder. Repeated grinding is required, and the efficiency is low and the waste is large;

[0006] 2. After grinding, the proportion of large pieces is large, and the amount of powder with a diameter of less than 100 μm is too small, which is not suitable for production needs;

[0007] 3. Poor diameter-to-thickness ratio: affects the color saturation and brightness of the coated pearl, and the yield is low;

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