摘要：研究了入烧原料细度对煤系煅烧高岭土白度、吸油率、 松容重、遮盖率（光散射系数）及活性（活性 Al₂O₃）等物理化 学性能的影响。结果表明‚入烧原料细度对煤系煅烧高岭土 的物化性能有显著影响‚减少入料粒度可以不同程度地提高 产品的白度、吸油率、活性 Al₂O₃ 及遮盖率。 

关键词：煅烧高岭土；粒度；物理化学性能

Abstract：T he effects of particle size distribution on the physical and chemical properties of calcined kaolin such as brightness‚ loose density‚oil absorption‚active Al₂O₃‚index of covering‚are studied．T he results shown that the brightness‚loose density‚oil absorption‚active Al₂O₃‚index of covering increased with the particle size of the materials decreased in some range． 

Keywords： calcined kaolin；particle size；physical － chemical properties