Process for producing KMg3(AlSi3O10)F2 crystal powder with wet-process synthesis

Abstract

The invention discloses a method for preparing synthesized KMg3(AlSi3O10)F2 crystal powder through a wet process. The method comprises the following steps: (1) crushing synthesized fluorophlogopite with the particle diameter of more than 0.85 millimeters, and using an ore washer for scrubbing and sieving so as to remove impurities, wherein the scrubbing hydraulic pressure is between 0.15 and 0.2 MPa; (2) making the scrubbed materials enter a pulper for pulping, wherein the pulping hydraulic pressure is between 5 and 7 MPa; (3) performing sieve classification on the obtained materials by pulping into three materials with three kinds of particle diameter, namely the materials with the particle diameter of more than 0.25 millimeter, the materials with the particle diameter of between 0.25 and 0.125 millimeter and the materials with the particle diameter of less than 0.125 millimeter, and performing pressure filtration on the three materials respectively, wherein the water content of the materials after pressure filtration is between 31 and 40 weight percent; (4) using a wheel mill to perform fine grinding and sizing on the three materials respectively, wherein the rolling gap is between 10 and 40 millimeters, the sizing is performed in a group of sizing pools, the materials with the particle diameter of more than 0.25 millimeter are subjected to rolling and sizing to generate powder products with the particle diameter of less than 100 mu m, the materials with the particle diameter of between 0.25 and 0.125 millimeter are subjected to rolling and sizing to generate powder products with the particle diameter of less than 250 mu m, and the materials with the particle diameter of less than 0.125 millimeter are subjected to rolling and sizing to generate powder products with the particle diameter of less than 160 mu m; and (5) using a plate-and-frame filter press to perform pressure filtration on the products after sizing, making the water content of the products be less.

Description

technical field [0001] The present invention relates to a kind of synthetic KMg 3 (AlSi 3 o 10 )F 2 The invention discloses a preparation method of crystal powder, which belongs to the field of preparation of non-metallic artificially synthesized crystal materials. Background technique [0002] KMg 3 (AlSi 3 o 10 )F 2 The crystal is commonly known as fluorine phlogopite, and KMg is synthesized by internal heat melting method 3 (AlSi 3 o 10 )F 2 Crystal is already a relatively mature technology. Its advantage is that the batch output is large, each batch output can reach more than 15 tons, the production cost is low, and mass production can be realized. mica pieces. Due to processing technology, these mica fragments cannot be effectively utilized except for a small amount of mica paper and mica board, which limits the development of this industry. After 2004, China has synthetic fluoromica powder on the market, and it has been successfully applied in many fields,...

AI Technical Summary

Problems solved by technology

However, in some high value-added application fields, such as cosmetics and pearlescent pigments, the synthetic fluorophlogopite powder required to be provided is wet-processed, has high whiteness, high diameter-thickness ratio, high surface activity, and moderate particle size distribution. Fluorphlogopite powder, while the existing synthetic fluorphlogopite powder cannot meet these requirements

Chinese patent 200510034878.8 discloses a preparation method of synthetic mica powder. The product prepared by this method has some improvements in performance, but the diameter-thickness ratio and surface activity of the product cannot meet the requirements of pearlescent pigments, and the quality is not stable.