White fused alumina powder production process

White fused alumina powder is a commonly used material in the fields of grinding, polishing, and wear-resistant fillers. The quality of white corundum powder directly affects the grinding effect or the function of wear-resistant products. White fused alumina has small particles. It’s difficult to judge its quality from its appearance. The materials and processing methods used directly affect the performance of WFA powder.

There are several key processes in the production of WFA:

1. Raw materials

The raw materials for producing white fused alumina powder should be fine powder made by grinding first grade WFA blocks. The first level fixed furnace white fused alumina block is more excellent.

2. Grinding process

Grinding white corundum blocks takes more than 20 hours. And the grinding medium is alumina balls. After grinding, the amount of white corundum powder is small, with a particle size range of 63 microns to 0.5 microns.

3. Overflow Siphon Process

The coarse white fused alumina powder 240mesh- 600mesh is classified using overflow classification method. The finer white fused powder 700 mesh – 10000 mesh production is a siphon process. More precise particle range control is beneficial for improving the uniformity of the powder.

4. Precipitation drying process

Natural precipitation is used to completely precipitate the powder suspension and remove moisture. Then, it is dried in a high-temperature kiln to control residual moisture. Finally, sieve and loosen the white corundum powder to maintain its looseness and prevent agglomeration.

The production of white fused alumina powder may seems simple. Strictly control methods of WFA is helpful for the production of high standard grinding tools and ceramic products.