煤和矸石选择性破碎分选理论研究  

Study on principle of selective crushing and separation of coal and gangue

作　　者：郑克洪[1] 杜长龙[1] 刘飞[1] 

机构地区：[1]中国矿业大学机电学院,江苏徐州221008

出　　处：《选煤技术》2012年第1期23-25,共3页Coal Preparation Technology

基　　金：江苏省自然科学基金项目(BK2009098)

摘　　要：通过对煤和矸石力学参数尺寸效应的研究,利用指数函数对各力学参数进行拟合,获得了各种岩石在不同粒径条件下的力学参数;借助玛洛金公式,对煤与矸石的冲击破碎速度进行计算,获得了煤和各种岩类矸石的冲击破碎速度范围,指出原煤之中不含类煤类岩石或类煤类岩石含量较少时可以进行煤和矸石的选择性破碎分选,并且煤和矸石的物理力学性质差别越大,选择性破碎分选的效果会越好。Selective crushing is an effective method to achieve the separation of coal and gangue. By study the size effect of coal and gangueg mechanics parameters, and use the exponential function to fit va- rious mechanical parameters, then acquire the rock＇s mechanics parameters under different grain diame- ter. Making calculation to the crushing speed of coal and gangue by the formula of , then can get the speed range of impact grinding about coal and gangue in different kind. Simultaneously, when there is al- most no coal rock in raw coal, selective crushing can be used to the separation of coal and gangue. If there is far more diverse of coal and gangue＇s physical - mechanical properties, the effect of selective crushing will be better.

关 键 词：煤 矸石 选择性破碎分选 冲击破碎速度 可行性 

分 类 号：TD941[矿业工程—选矿]