Method for preparing medium aluminum grinding balls by secondary ball milling

Abstract

The present invention relates to a method for preparing medium aluminum grinding balls by a secondary ball milling process. According to the method, raw materials are weighed according to a certain ratio, wherein the raw materials comprise, by weight, 85-90% of sintered bauxite, 2-5% of dolomite, 2-5% porcelain stone, 2-5% of clay and 0.5-2% of sodium humate; the massive raw materials are crushed, and added to a ball mill; water, a dispersion agent sodium tripolyphosphate and a polyvinyl alcohol solution are added to the ball mill; treatments of ball milling, screening, staling are performed; a secondary ball milling treatment and a screening treatment are performed; the resulting slurry is subjected to spray drying and pelletizing by a high tower to obtain a powder material; the powder material is screened; the screened powder material is subjected to pressing formulation under isostatic pressure to obtain a blank material; the blank material is placed into a kiln, and is subjected to high temperature firing to obtain the finished product. According to the present invention, the secondary ball milling treatment is adopted, such that the grinding efficiency and the grinding ball yield can be improved, and the production cost can be reduced; the AL2O3 content in the product is more than 70%, the compression strength is more than 1800 MPa, the volume density is 3.0-3.03 g / cm<3>, the abrasion loss is less than or equal to 0.03%, and the performance of the product of the present invention is superior to the similar products.

Description

technical field [0001] The invention relates to a ball grinding method, in particular to a method for preparing medium aluminum grinding balls by a secondary ball milling process. Background technique [0002] Grinding media are widely used in the grinding and processing of raw materials in various industries such as minerals, ceramics, paints, and cosmetics. They are a necessity in many industries and have a wide market. Ball milling can change the particle size distribution of the powder. The ball milling process requires the matching of grinding balls with different particle sizes to produce better results. In addition, in order to avoid pollution to the powder during the ball milling process, it is necessary to choose a mill that is wear-resistant and has no harmful ingredients. For the ball, it is best to choose a grinding ball made of the same material as the powder. [0003] At present, the performance of grinding medium balls used by domestic wall and floor tile en...

AI Technical Summary

Problems solved by technology

[0003] At present, the performance of grinding medium balls used by domestic wall and floor tile enterprises is not satisfactory, and there are disadvantages such as poor wear resistance, easy to break and break, and more impurities.

In the production of ball mills in domestic Chinalco porcelain ball factories, the ball milling time is long, the power cost is high, the labor intensity is high, and the ball milling efficiency is low, resulting in a waste of manpower and material resources; moreover, due to the low output of grinding balls, the scale cannot be formed, which restricts Chinalco The development of the ceramic ball industry will affect the development of the building ceramics industry