Pure-blonde pearlescent pigment prepared from solid wastes produced in mica powder purification process

Abstract

The invention discloses pure-blonde pearlescent pigment prepared from solid wastes produced in a mica powder purification process. The pure-blonde pearlescent pigment comprises a mica powder substrateprepared from solid wastes produced in the mica powder purification process and a composite layer covering the surface of the mica powder substrate, and the pure-blonde pearlescent pigment is characterized in that the thickness of the mica powder substrate is 0.6 to 2 micrometers, the particle size range is 5 to 70 micrometers, D50 is equal to 25 plus or minus 2 micrometers, a first layer of thecomposite layer is tin oxide, a second layer is titanium oxide, a third layer is ferric oxide, a fourth layer is aluminum oxide, and a fifth layer is titanium oxide. The pure-blonde pearlescent pigment is simple in structure and convenient in operation. The solid wastes produced in the mica powder purification process are used for preparing the pure-blonde pearlescent pigment, so that the production raw material cost of the pure-blonde pearlescent pigment is reduced, the pressure for processing tailings used as the solid wastes can be alleviated, the product is relatively good in blonde purity, high in blonde saturation, excellent in brightness, and good in dispersity, weather resistance and chemical stability when in use.

Description

technical field [0001] The invention relates to a pearlescent pigment, in particular to a pure gold pearlescent pigment produced by using solid waste produced in the process of purifying mica powder. Background technique [0002] Pearlescent pigments are composed of thin layers of several metal oxides coated with mica. Different pearlescent effects can be produced by changing the thin layer of metal oxide. Therefore, when making pearlescent pigments, the thickness and cleanliness of mica are high. At present, most of the mica used in pearlescent pigments is natural mica, and natural mica is born in granite, orthoclase, pegmatite, gneiss and schist. And it often coexists with quartz, feldspar, turquoise, lithium limestone, fluorspar and apatite. In the process of grinding and processing mica ore into mica powder suitable for pearlescent pigments, the primary effective utilization rate is only 45%, and a large amount of tailings are likely to be generated in the production p...

AI Technical Summary

Problems solved by technology

Treating the tailings containing so much mica powder as solid waste will undoubtedly increase the production cost of pearlescent pigments with mica powder as the core base material. At the same time, the tailings as solid waste will also increase the pressure on environmental treatment

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