Abstract: The recovery of lead from leadzinc slag is becoming more and more urgent.commonly,the Pb element is changed into galena by crystalline phase control and then floated as concentrate.However,the traditional xanthate collector is weak in collecting the synthetic galena.It was found that the flotation could be improved by a new mixed collector.The mechanism of flotation enhancement was studied by means of flotation,dynamic potential,adsorption capacity and molecular dynamics simulation.The results show that the floatability of the synthetic galena was poor when the amyl xanthate was used as collector,but the flotability was improved using mixed collector.The results of dynamic potential measurement,adsorption capacity detection and molecular simulation show that the different components of the mixed collector promote each other's adsorption on the surface of the synthetic galena,so the flotation is strengthened.

Key words: Enhanced flotation, Synthetic galena, Mixed collector