基于选煤厂外排矸石中砂岩、高岭岩和煤矸石硬度的差别,通过破坏载荷试验以及破碎筛分、发热量测定试验,探讨砂岩、高岭岩和煤矸石选择性破碎分选的可行性。结果表明,在硬度差别比较明显的情况下,通过硬度进行选择性破碎分选是可行的。 Based on the difference of the hardness of sandstone, kaolinite and coal gangue outside the gangue discharged from the coal preparation plant, the feasibility of selective crushing and sorting of sandstone, kaolinite and coal gangue is explored through the tests of failure load, crushing, screening and calorific value Sex. The results show that in the case of obvious differences in hardness, selective crushing and sorting by hardness is feasible.