实验室试验表明,随着煤炭变质程度的增加、煤样平均粒径的降低和所含全水分的增加,微波干燥效果变差。对试验数据分析,微波干燥浮选精煤的机理是随着干燥时间的增加,煤样吸附的表面水分首先得到激发,进而煤样的毛细孔水分和部分结合水分得到激发、活化和挥发。 Laboratory tests show that as the degree of coal metamorphism increases, the average particle size of coal decreases and the total moisture content increases, the microwave drying effect becomes worse. The experimental data analysis, the mechanism of microwave drying flotation of coal is as the drying time increases, the surface of the first adsorption of coal samples are excited, and then the coal sample capillary pore water and part of the combined water is excited, activated and volatile.