Process renovation of reducing the rate of particle size small than lower size limit of lump coal in Fangzhuang No.2 colliery coal preparation plant

Research have been done to solve the problem of the rate of particle size small than the lower size of lump coal exceed limit in Fangzhuang No.2 colliery coal preparation plant,determined by expanding the screen aperture of the sieve bend of cleane coal to improve the efficiency of screening and reduce undersize fraction.Production results show it is feasible.