Abstract: The dressing plant of high-sulfur tungsten ores associated with copper and bismuth in northern Guangdong province adopted table-flotation to recover sulfide minerals from gravity tungsten roughing concentrate， then recycle Cu and Bi by repressing bismuth before floating the copper and concentrate bismuth by gravity separation from mixed sulfide ores. The recovery of copper and bismuth by this method is low and the copper concentrate contains large amount of bismuth. In order to solve the problem of efficient separation and recovery of copper and bismuth， experiments of separation and recovery of copper and bismuth taking gravity roughing concentrate of tungsten as the samples were carried out. The results showed that the grade of WO₃， Cu， Bi and Ag are 13.66%， 3.32%， 1.93% and 308.50 g/t respectively. The main copper minerals are chalcopyrite and chalcocite， and the main bismuth mineral is bismuth. The particle size of useful minerals ranges from 0.04 mm to 0.64 mm. Wolframite， scheelite and pyrite are coarse-grain dissemination， and chalcopyrite and bismuth ores are fine-grain dissemination. In the case of the rod milling with particle size below 0.2 mm， lime as regulator， SY as bismuth depressant and Z-200 as collector， Bi was inhibited and Cu was floated by the process of one-roughing one-cleaning and two-scavenging. Bismuth was activated by the process of one-roughing two-cleaning and two-scavenging with GYC-1 as bismuth activator and butyl xanthate as bismuth collector. The copper concentrate with 19.01% copper grade， 93.51% copper recovery rate and 0.81% bismuth content， and the bismuth concentrate with 21.39% bismuth grade， 78.61% bismuth recovery rate and 0.63% copper content were obtained finally. Compared with the on-site production index， the copper grade and copper recovery rate of copper concentrate were increased by 10.48 percentage points and 9.19 percentage points respectively， and the bismuth content of copper concentrate was decreased by 1.85 percentage points. The bismuth grade of bismuth concentrate was decreased by 5.23 percentage points， the bismuth recovery was increased by 33.25 percentage points， and the copper content was decreased by 1.68 percentage points. The separation and recovery of copper and bismuth are well realized.

Key words: Tungsten ores associated with copper and bismuth, Tungsten gravity roughing concentrate, Sulphide ores, Separation and recovery of copper and bismuth