Abstract: According to the problem of low yield of flotation clean coal in Baishan coal preparation plant,based on the analysis of coal quality characteristics,investigated the feasibility of separating coarse slime by interfered bed separator,and determined the principle flowsheet of separating coarse slime.The results show that the method of using TBS separating coarse slime separation is simple,feasible,can effectively improving the clean coal yield and economic benefit of coal preparation plant.