Preliminary Study on the Grinding of a low-grade and high-Si bauxite in Guizhou province

摘要

This paper describes the grinding experiments of a low-grade and high-Si bauxite in Guizhou,China.Based on the QEMSCAN process mineralogy, and according to the laboratory conditions test, the laboratory grinding time of 6min, conditions of filling rate of 38％, grinding concentration of 70％, precision ball diameter: Ф30mm:Ф25mm:Ф18mm=25％∶45％∶30％, SCS grinding agent, stage-grinding were obtained.Under the above conditions, the trend of polarization with particle fractions of bauxite grinding product is improvedand also has a noticeable effect of selective grindingthe particular interval of-0.02 l mm.The characteristics of particle size and aluminium mineral distribution of the grinding product are improved.