Acid Washed Brown Fused Alumina
The Brown Fused Alumina produced by the traditional method inevitably contains some impurities. These impurities will affect the abrasive grit quality. To meet the high requirement of purity of foreign company, the acid washed, wind washed and water washed method were used in the production.
Usually, water washed and wind washed were used in the coarse grain, and acid washed was used in fine powder. The acid washed Brown fused alumina has higher purity, the cleaning of impurities in brown fused alumina abrasive requires a large amount of sulfuric acid and water discharge, and the grading process of brown fused alumina still requires a large amount of water. Therefore, according to statistics, a ton of brown fused alumina abrasive need 200 tons of water and 100 kilograms of acid. Therefore, although the acid process can produce high-quality brown fused abrasive, it also increases the production cost. At the same time, the wast water cause water pollution to the environment.
And some plant seeking high heat treated measure to replace acid process.