Abstract: In order to tackle the problems encountered by the plant's slime recovery system, a screening analysis is made of the < 1.0 mm fine sizes in raw coal. In line with the specific operating condition of the plant, it is proposed to recover the 0.5~1.0 mm coarse grained slime using high-frequency screen. The renovation made with the proposed scheme has led to increased recovery of coarse slime and improved economic performance, which may serve as a guidance for the use of the high-frequency screen in renovation of coal preparation plants.