Preparation process of corundum powder

Abstract

The invention belongs to the technical field of corundum powder, and particularly relates to a preparation process of corundum powder. The process comprises the following steps of (1) coarse crushing,crushing a corundum block to obtain a fine crushing material with the particle size of less than 20 mm and a crushed material with the particle size of more than or equal to 20 mm and less than 50 mmin particle size; (2) fine crushing, crushing the fine crushing material and crushed material obtained in the step (1) through a three-stage closed-loop circulating pair roller, screening and gradingto obtain a particle material with the particle size being more than or equal to 0.106 mm and less than 0.5 mm in particle size; (3) fine grouping sieving, the granules obtained in the step (2) are screened into two-section materials with the particle size of 0.0106-0.180 mm and 0.180-0.5 mm; (4) finishing product, the two-section materials obtained in the step (3) are subjected to dust removal,magnetic separation and fine screening to obtain a corundum powder finished product. The prepared corundum powder particles are more uniform in particles, high in yield, short in efficiency, short inperiod, low in cost and clean in materials.

Description

technical field [0001] The invention belongs to the technical field of corundum powder, and in particular relates to a preparation process of corundum powder. Background technique [0002] Corundum, whose main component is alumina, has been widely used in many industrial fields such as metallurgy, machinery, chemical industry, electronics, aviation and national defense because of its excellent high-temperature properties and mechanical strength. [0003] There are two main methods to produce corundum: one is the direct method, that is, directly melts or sinters natural bauxite into brown corundum, bauxite corundum, sub-white corundum, etc.; the other is the indirect method, that is, first uses bauxite Mine produces industrial alumina, and then electric melting or sintering alumina produces white corundum, dense corundum, tabular corundum, sintered corundum, etc. Therefore, bauxite is an important raw material for the production of corundum. The corundum raw material prepar...

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Problems solved by technology

[0004] At present, most of the machines used in the production of corundum into corundum powder are the same as those used to process ore in ore dressing, but since the compressive strength of the abrasive is several times higher than half of the ore, the daily processing capacity of the abrasive is obviously smaller than that of the beneficiation plant. There are problems such as low production efficiency, large dust, low bulk density, low material yield, poor material uniformity, low material cleanliness, and low economic indicators.

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