Mica characteristics
Mica: strong adhesion, elasticity, suitable gloss and high whiteness
Sericite: Some functions are better, such as natural fine particle size, fine texture, silky luster, large diameter-to-thickness ratio, and high safety. Can meet the special requirements of advanced beauty cosmetics.
Excellent inorganic mineral filler, with excellent heat resistance, acid and alkali resistance, weather resistance, excellent mechanical properties of compression resistance, shear resistance and abrasion resistance, good optical properties of shielding ultraviolet rays and anti-infrared radiation.
The unique scale structure makes it have excellent insulation properties. Its volume resistivity reaches 1014 ~ 1015 Ω·m, and the 25.4μm sericite sheet can withstand 5000V without being broken down, which is suitable for insulating materials.
Processing status
Purification: Wet processing can better maintain the flatness and gloss of mica wafers.
Modification: As a mica powder of body pigment, the powder has a small particle size and is easy to aggregate. It needs to be surface-modified to improve its dispersibility, and fully exert the skin feel, ductility, adhesion, hiding power required by cosmetics. Superior properties such as UV scattering, optical properties, and transparency.
2. Preparation of mica powder
Research on the technological advantages of non-metallic mineral resources (wollastonite, kaolin, mica, graphite) efficient use
The "semi-lamination method" used in the study was to test the thickness of mica by scanning electron microscopy. According to different principle of different thickness-to-thickness ratio of mica powder in water after sedimentation, the mathematical model of the relationship between the diameter-thickness ratio and the stacking height of different mica powders was established. The rapid determination of the mica powder diameter to thickness ratio is achieved.
Approved the industry standard for the determination method of mica powder diameter to thickness ratio (JC/T2063-2011)
Research on key technology and equipment for mica powder processing with large diameter and thickness ratio
Mica raw ore pretreatment and hydraulic crushing process and equipment
The wheel mill is used for pretreatment of raw materials. By adjusting the pressure and rotation speed of the wheel mill, the stripping effect is increased, and good conditions are created for the subsequent water jet mill.
The water jet mill pulverized product was classified by an improved horizontal centrifugal classifier, and three grades of average grain size of 25 μm, 20 μm, and 15 μm were obtained, and the aspect ratios were 91.5, 71.1, and 61.0, respectively.
The water jet mill pulverized product was classified by an improved horizontal centrifugal classifier, and three grades of average grain size of 25 μm, 20 μm, and 15 μm were obtained, and the aspect ratios were 91.5, 71.1, and 61.0, respectively.
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