Abstract: The kaolin content of a kaolin ore in Yichang is about 95%，but its fraction yield in -2 μm size just reaches 30% and 10% of kaolin has not been striped which contains organic coloring impurities，so it is hard to realize decolorization by direct roasting.In order to obtain high quality kaolin clinker，the conditions of splitting process are studied，and the SEM photos and whiteness of clinker of kaolin clay before and after the splitting are analyzed.It is obtained that stripping product in -2 μm size reached the yield of 96.62% under conditions of volume ratio of medium corundum mill ball (Φ=1.2 mm) and little ball (Φ=0.8 mm ) 0.8∶1.5，grinding concentration 70%，grinding medium fill rates 70%，stripping speed 800 r/min for 180 minutes and dispersant sodium hexametaphosphate accounting for 3% of the raw materials by adding once before grinding.The products are even grained monolithic kaolin with smooth surface;the whiteness of kaolin clinker is increased from 76.84% to 82.08% after splitting，about by 5.24%.The granularity of kaolin and the whiteness of kaolin clinker after splitting can reach requirements for high quality fillers.

Key words: Kaolin, Stripping, Dispersant, Fraction yield in -2 μm size, Whiteness