Coal-bearing kaolinite is an important non-metallic mineral resource,and thus it attracts much attention from government and business for wide applications.But the utilization rate of the coal-bearing kaolinite is very low at present,because of its high-content impurity and low whiteness comparing with commercial kaolinite.Further increase in the uses of this mineral needs further development of processing technology and the lowering the cost of production.High temperature calcination is the most commonly u...