Abstract: To lower the ash content and control the quality of coarse clean coal in Wugou coal preparation plant,on the basis of conduct screening test and float and sink test for the feed of vibration screen,using the FBS1800 coarse slime teeter bed separator reformed the original separation process. Through the analyzing the application result,the FBS1800 coarse slime teeter bed separator shows better desliming and ash reduction effect and obtained good economic benefit.