Abstract: To utilize the slimes in long flame coal properly and efficiently, flotation experiments were carried out to study the enhancement of dispersants and polyacrylamide (PAM).The results show that as a kind of steam coal, the clean coal product of long flame coal should have a proper ash content of about 16%-20%.The kerosene and octanol dosages should be in the range of 1 000 to 2 000 g/t and 150 to 200 g/t, respectively, to ensure qualified product and acceptable reagent consumption.Dispersants can improve the flotation of long flame coal by eliminating slime coverage from coal particle surfaces as a sequence of sodium polyphosphate> hexametaphosphate> Tetrasodium pyrophosphate, which is related to their molecular configuration and anion content.For sodium polyphosphate at 3 000 g/t, the ash content of the clean coal and the tailing coal is 19.64% and 69.33%, respectively, and the combustible recovery of the clean coal is increased by 11.80%.Small dosage of PAM is desirable for both decreasing the ash content and increasing the combustible recovery of the clean coal.When small dosage of APAM was used, a clean coal of 17.25% ash and 94.23% combustible recovery was obtained with a tailing of 66.27% ash.