Grinding medium and preparation method thereof

Abstract

The invention discloses a grinding medium, which comprises the following raw materials in percentage by weight: a first raw material group: 90-95% of alumina powder, 0.5-2.0% of calcined talc, 1.0-3.0% of dolomite, 3.0-5.5% of Suzhou soil and 0.3-0.8% of yttrium oxide; and a second raw material group which comprises 0.2-1.0% of a plasticizer and 0.2-1.0% of a dispersing agent; meanwhile, the invention further discloses a preparation method of the grinding medium. By increasing the content of aluminum oxide in the grinding medium, the liquid phase amount in the sintering process is reduced. The finally prepared grinding medium is low in porcelainization degree and large in grain boundary energy, and large cracks are difficult to generate in the impact process. Therefore, according to the process, the impact resistance of the grinding medium is greatly improved, so that the grinding medium is suitable for a relatively severe dry grinding environment.

Description

technical field [0001] The invention belongs to the technical field of grinding materials, and in particular relates to a grinding medium and a preparation method thereof. Background technique [0002] Microcrystalline alumina grinding media has excellent properties such as corrosion resistance, high grinding efficiency and good quality, and is widely used in mineral processing, ceramics, electronic materials, magnetic materials, coatings, paints and other industries. When alumina grinding media is used in wet grinding In the industry, it has excellent grinding effect, but in the dry grinding industry, the grinding effect is limited to a certain extent, and the phenomenon of "ceramic collapse" is prone to occur. This is mainly because in the wet grinding environment, the grinding medium is subjected to the slurry during grinding. The resistance is equivalent to the increase of the buffer during the collision process, and the temperature of the slurry is generally low, rarely...

AI Technical Summary

Problems solved by technology

[0002] Microcrystalline alumina grinding media has excellent properties such as corrosion resistance, high grinding efficiency and good quality, and is widely used in mineral processing, ceramics, electronic materials, magnetic materials, coatings, paints and other industries. When alumina grinding media is used in wet grinding In the industry, it has excellent grinding effect, but in the dry grinding industry, the grinding effect is limited to a certain extent, and the phenomenon of "ceramic collapse" is prone to occur. This is mainly because in the wet grinding environment, the grinding medium is subjected to the slurry during grinding. The resistance is equivalent to the increase of the buffer during the collision process, and the temperature of the slurry is generally low, rarely exceeding eighty or ninety degrees, so the product is used in a better environment, and the microcrystalline alumina grinding medium is fully capable of grinding work

However, in the dry grinding environment, solid particles are generally ground, and the uniformity of the material is poor. During the grinding process, there are more hard-to-ball collisions between the balls, so the buffer in the dry grinding environment is not sufficient, and most of the dry grinding The crushing efficiency is not high, the heat production is large, and it is difficult to cool down, so the use environment is much worse than wet grinding, and the phenomenon of peeling off of the grinding medium is prone to occur, that is, the phenomenon of "ceramic collapse"

Images