Abstract: The scrubbed slime in a Yunnan phosphate mine contains P₂O₅ of 20.08%，where the phosphorus-containing mineral is mainly fluorapatite with uneven grain fineness. Phosphorus has a certain degree of enrichment in coarse size.Carried out the flotation test to recovery phosphorus，the results showed that under the grinding fineness of 70% -200 mesh and self-developed LC3 as collector of phosphate，phosphate concentrate with P₂O₅ grade of 28.38 % and a recovery of 98.67% was obtained by the process of two roughings- two scavengings-3 cleanings with the middlings returned into the flows orderly.

Key words: Scrubbed slime of phosphorite, phosphorus flotation, Collector LC3