Comprehensive Utilization and Purified Research on Kaolin Ores in Huichang

Abstract

Kaolin ores in Huichang contain the minerals of quartz sand, kaolin, mica, and feldspars. In order to recover these valuable resources, some experiments of screening, classification, magnetic separation, grinding, and flotation are carried out on the basis of the kaolin ore properties. The test results indicate that quartz sand concentrate can be directly obtained when the size of vibrating screen is ten meshes. Materials that are smaller than the screen hole are injected to hydraulic cyclones of which the controlling classification size is 325 meshes; kaolin concentrate with the elements of Al₂O₃ above 33.70 % and Fe₂O₃ 0.37 % can be well beneficiated from the overflow through magnetic separation with one stage which is rougher and cleaner to remove iron. On the other hand, the hydrocyclone spigot flow to grinding and flotation with one rougher stage and two scavengers, mica, and feldspar concentrate can be beneficiated in sequence. Therefore, comprehensive utilization of these valuable minerals of kaolin ores can be realized.