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采用SEM、XRF、XRD和IR研究了大同、平朔和淮北煤系高岭石的结构、粒度及其特性,探讨了粒度大小对高岭石插层作用的影响及其机理。研究发现:粒度中等且结晶有序的平朔煤系高岭石插层率最高,其次为晶体粗大但结晶有序的大同高岭石,粒度最小且结晶无序的淮北高岭石插层率最低。研究认为高岭石原始晶粒粒度对高岭石插层作用有重要影响,中等粒度最有利于高岭石插层作用的进行,粒度过大或过小均不利于高岭石插层作用的进行,其原因是由于不同粒度的高岭石插层作用过程中导致的差异弹性变形引起的。结晶有序度对高岭石插层作用也有重要影响,结构无序不利于插层作用的进行。
The structure, grain size and characteristics of kaolinite in Datong, Pingshuo and Huaibei coal measures were studied by SEM, XRF, XRD and IR, and the effect of particle size on the intercalation of kaolinite and its mechanism were also discussed. It is found that the intergranular rate of kaolinite with moderate grain size and ordered crystallinity is the highest in Pingshuo coal series kaolin, followed by that of coarse Datong kaolinite which is coarse and crystalline, and the intergranular kaolinite intercalation rate of Huaibei lowest. The study shows that the original grain size of kaolinite has an important influence on the intercalation of kaolinite. The medium grain size is most conducive to the intercalation of kaolinite. Too large or too small grain size is not conducive to the intercalation of kaolinite , Due to the differential elastic deformation caused by the intercalation of kaolinite with different particle sizes. The degree of crystallinity also plays an important role in the intercalation of kaolinite, which is not conducive to intercalation.