茂名高岭土的造纸涂布性能研究

The Properties of Paper Coating Kaolin from Maoming

对茂名高岭土的物质组成、白度、粒度组成、粘浓度、含砂量等造纸涂布性能进行了研究。研究结果表明 ,茂名高岭土中主要粘土矿物为高岭石 ,主要在 - 2 μm粒级中富集 ,含量达 99%以上 ;化学成分以 Si O2 、Al2 O3 和 H2 O+为主 ,Fe2 O3 、Fe O和 Ti O2 着色杂质组分的含量均较低 ,涂布级高岭土化学成份单一 ,与高岭石的化学成分理论值非常接近。涂布级高岭土白度高、粒度分布合理、粘浓度值大、流动性好、含砂量低 ,具有良好的造纸涂布性能 。

This paper deals with the compositions,brightness,size distribution,viscosity concentration and the content of sand of Maoming kaolin.Experimental results show that the main clay mineral in Maoming kaolin is kaolinite,which is concentrated within -2μm size fraction with content of more than 99%.The chemical composition of the kaolin is mainly SiO 2,Al 2O 3 and H 2O +,with minor amount of impurity components such Fe 2O 3,FeO and TiO 2.The chemical composition of the coating kaolin is pure and closes to kaolinite's theoretical value. It is suggest from the properties for coating that Maoming kaolin has high brightness and rational size distribution with high viscosity concentration and low content of sand,which is a high quality material for paper coating.