Abstract:It is very important to add a suitable collector when flotation separation lead and zinc in Pb-Zn sulfide ore. In this paper, the traditional lead collectors BX, DDTC and ADD were selected to study the collectors adsorption difference behavior on lead-zinc sulfide ore surfaces under alkaline conditions by flotation test, micro-thermokinetic analysis, adsorption capacity and wettability determination. The flotation test results showed that the recovery difference between galena and sphalerite in alkaline flotation separation was in the order of DDTC_(80.49%) > BX_(76.49%) > ADD_(66.40%), so compared with BX and ADD, the selectivity of DDTC was the best, and the recovery of galena was 98.28% and sphalerite was 17.79%. By comparing the apparent activation energy difference, adsorption capacity difference and contact angle difference of the three collectors on galena and sphalerite surface, it can be found that when the pulp pH was 12, the selectivity of DDTC was the best when separating galena and sphalerite, which further verified the reliability of the flotation test results.