Preparation method of modified composite ultrafine talcum powder

Abstract

The invention discloses a preparation method of modified composite ultrafine talcum powder, which comprises the following steps: (1) breaking raw material, and grinding the broken material to fine powder; (2) adding water and grinding-assistant medicine into the ground material to be configured into pulp with the concentration of 50 to 70 percent and to be uniformly mixed; (3) configuring composite modifier, silane coupling agent and sodium stearate to surface modification solution to be poured into the pulped material so as to modify the material; (4) carrying out the wet-method ultra-fine grinding on the modified material, and requiring the particles with the granularity being less than 2 micrometers for the mineral pulp ultra-fine grinding to be more than 95 percent; (5) forcibly drying and collecting the material after being ultra-fine ground. By utilizing the wet-method ultra-fine grinding and mightiness drying process, the prepared modified composite ultra-fine talcum powder has smaller granularity than that of ordinary talcum powder and wider distribution, resists the insolation and high temperature, has good water resistance, resists pollution, and has strong anti-aging performance.

Description

technical field [0001] The invention relates to a preparation method of modified composite superfine talc powder. Background technique [0002] Talc is a hydrous magnesium silicate mineral with the chemical formula 3MgO 4SiO 2 ·H 2 O. Since talc powder is inert to most chemical reagents, does not decompose when in contact with acid, is a poor conductor of electricity, has low thermal conductivity and high thermal shock resistance, and does not decompose when heated to a high temperature of 900°C. These excellent properties make it a A good filler for filling plastics or as an additive for coatings. At present, talcum powder has been widely used in industries such as coatings, paper making, plastics and cosmetics, while the talcum powder needed in the domestic market mainly depends on imports. Especially ultra-fine talcum powder, due to high production technology requirements, is still relatively scarce in the domestic market. However, the existing ultrafine talcum powde...

AI Technical Summary

Problems solved by technology

Especially ultra-fine talcum powder, due to high production technology requirements, the current domestic market is still relatively scarce

However, the existing ultrafine talcum powder preparation method generally adopts the dry ultrafine pulverization process. Due to the large energy consumption, high cost, low production efficiency and poor deep processing ability of the fluidized bed jet mill required in the production process, the talc powder product High cost and defects of insufficient fineness and wide particle size distribution