煤系高岭土的高效脱碳提质是后续深加工利用的前提和保障。 通过红外光谱(FTIR)、X 射线光电子能谱(XPS)以及荷质比测试探究了机械力改性对煤系高岭土不同组分颗粒(高岭石和 净煤)表面元素组成、官能团以及荷电性能的影响。 在此基础上,采用旋转摩擦电选试验研究了机 械力改性对煤系高岭土脱碳效果的影响。 研究结果表明:机械力改性能够改变高岭石和净煤颗粒 表面元素以及官能团,引起高岭石和净煤颗粒表面荷电性能的变化。 机械力改性能够使高岭石和 净煤表面 C—C 基团含量升高、C—O 基团含量降低、C

The efficient decarbonization and quality improvement of coal-series kaolin is the premise and guarantee for subsequent deep processing and utilization. The influence of mechanical modification on the surface elemental compo- sition,functional groups,and charging performance of different component particles (kaolinite and clean coal) in coal- series kaolin was studied by Fourier transform infrared spectrum (FTIR),X-ray photoelectron spectroscopy (XPS), and charge-to-mass ratio tests. The effect of mechanical modification on the decarbonization performance of coal-se- ries kaolin was also investigated using rotary triboelectric separation tests. The research results show that the mechanical modification could change the elements and functional groups on the surface of kaolinite and clean coal particles, which caused the changes in the surface charge properties of kaolinite and clean coal particles. The mechanical modifi- cation resulted in an increase in the content of C—C groups,a decrease in the content of C—O groups,and an in- crease in the content of C