Abstract: In order to determine the optimal coal cleaning process, Yuandatan Plant conducts an analysis of the property of the coal treated, as well as a survey of the target coal users around the Yuhengbeiqu coal field. Based on the results of analysis and survey and the principle of attaining a maximum economic benefit for the plant, the following washing processes are finally adopted: use of heavy medium vessel to treat the 200～13mm coarse coal ( The capacity for washing down to 8mm reserved); the ＜13mm small coal is untreated but with reserved washing capacity; recovery of coarse slime with centrifuge; and recovery of fine slime with filter press. Practice shows the washing scheme selected is suitable for treating such coal and its use has reached the design capacity. Because of the high adaptability of the scheme to market requirement, its use has created favorable economic result for the plant.