Abstract: In light of the features of bulk copper-sulfur concentrate of Longqiao Iron Mine, the bulk concentrated was reground to 88.00% -45 μm  and then treated by one roughing, one cleaning and one scavenging flowsheet. As a result, the grade and recovery of the copper concentrate and the sulfur concentrate reached 20.84% and 90.54 %, and 49.48% and 94.85% respectively, rather good metallurgical performance. Thus, the difficulty in separating the copper from sulfur in bulk concentrate was effectively solved.

Key words: Bulk concentrate, Regrinding, Separation of copper from sulfur