Aluminum oxide manufacturing involves crushing, pre-grinding, milling, homogenizing and gradual heat treatment of aluminum oxide ores or aluminum oxide concentrates

摘要

Aluminum oxide manufacturing involves crushing, pre-grinding, milling, homogenizing and gradual heat treatment of aluminum oxide ores or aluminum oxide concentrates. Alkalis and raw mixture containing calcium carbonate carriers are prepared by utilizing drying, preheating, calcining, sintering and cooling processes. The aluminum oxide of the milled sintered product is subsequently dissolved in caustic soda. The raw mixture is milled with a mass ratio of 3:1-1:9 and 0.01-80 micron grain grade to 80.01-3000 micron grain grade.