Method for preparing brown mica powder

A technology of phlogopite powder and phlogopite, applied in the direction of aluminum silicate, silicate, etc., can solve the problems of impreciseness and discoloration, and achieve the effect of natural color, smooth hand feeling and high refractive index

Inactive Publication Date: 2015-05-13
ANHUI HENGHAO SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Generally, phlogopite ore is used as raw material for preparation of phlogopite powder. Existing phlogopite powder products have disadvantages such as discoloration and impreciseness.

Method used

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Examples

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Embodiment Construction

[0021] The present invention will be described in detail below through specific examples.

[0022] A kind of preparation method of phlogopite powder, its preparation method comprises the steps:

[0023] (1) Material selection: manual selection of natural high-quality phlogopite ore, density: 2.7-2.9g / cm 3 Whiteness: 60-70 Transparency: 0-25.5%, Refractive Index: 1.6-1.55, Mohs Hardness: 2.78-2.85, Elasticity Modulus: 1394.5-1874 (10 6Pa), among which light-colored phlogopite ore is transparent and glassy Gloss, cleavage shows pearly luster;

[0024] (2) Wet flakes: the selected high-quality phlogopite ore raw materials are peeled by wet flakes, washed with water, impurity removed, soaked, and rolled to form a flake-like raw material A;

[0025] (3) Rolling and pulverizing: Drying and dehydrating the flake raw material A at low temperature, and rolling it with a wheel mill to produce material B of phlogopite particles;

[0026] (4) Screening and flotation: Material B is scr...

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Abstract

The invention discloses a method for preparing brown mica powder, and belongs to the field of methods for preparing mica. The method for preparing brown mica powder comprises the following steps: (1), material selection, (2), wet splitting, (3), rolling crushing, (4), screening and flotation, and (5) filtering and drying. For the brown mica powder, the granularity D50 is 10 <+ / -2>(mum), the degree of whiteness is more than 60, the moisture is less than 1%, the PH value is 6 to 8, the bulk density is less than 0.17 g / cm<3>, the diameter-to-thickness ratio is more than 90; the content of heavy metals is as follows: Pb is less than 5, As is less than 1, Hg is ND, Cd is ND, Sb is ND, and Ni is ND. The method for preparing the brown mica powder has the advantages that the prepared brown mica powder has elasticity, remains the characteristics of sheet structure, large diameter-to-thickness ratio, high refractive index, high purity and high glossiness, and is fine in appearance, smooth in hand-feeling, and natural in color.

Description

technical field [0001] The invention relates to the field of mica preparation methods, in particular to a preparation method of phlogopite powder. Background technique [0002] Phlogopite is one of the muscovite minerals. It is a monoclinic layered silicate mineral. It is an aluminum silicate containing iron, magnesium and potassium. If the iron in the phlogopite is not too much , it can be used as an electrical insulating material, and it is widely used in chemical industries such as building materials industry, fire protection industry, fire extinguishing agent, welding rod, plastics, electrical insulation, paper making, asphalt paper, rubber, and pearlescent pigments. [0003] Pure natural green phlogopite powder can be used directly in pressed powder, BB cream, loose powder, liquid foundation, mask, etc. without adding any pigment, and has received high praise from the industry. [0004] The raw materials for preparing phlogopite powder generally all use phlogopite or...

Claims

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Application Information

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IPC IPC(8): C01B33/26
Inventor 关洪勇万斌陈静
Owner ANHUI HENGHAO SCI & TECH
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