Effect of low-temperature pyrolysis on the surface hydrophobicity of low rank coal and the analysis of floatability of semi-coke 低温热解对低阶煤表面疏水性的影响机制及半焦可浮性分析

Low-grade coal is difficult to obtain high efficiency by conventional flotation due to its poor surface hydrophobicity.In addition,the reactivity between low-grade coal and oxygen is high,so it is prone to spontaneous combustion.However,there is less oxygen in coal bed or internal dump,so the coal mainly suffers high temperature baking(similar to null temperature pyrolysis environment).Low temperature pyrolysis has gradually become one of the...