With the flotation flowsheet of one roughing and one cleaning, and the addition of a depressant (carboxymethyl cellulose, CMC) during cleaning process, the ash content of the final product was reduced from 12.10% to 9.87%.

• 采用粗选、一次精选的浮选流程；在精选过程中添加抑制剂(羧甲基纤维素)；可使精煤灰分从12.；10%25降低到9