Experimental Research on Mineral Processing of a Refractory Lead-Zinc Ore with High Pyrite

According to the property of a refractory lead-zinc ore with high pyrite,experimental study had been conducted on reagent conditions of floatation and closed-circuit tests for comprehensive recovering all kinds of useful minerals.A flotaion flowsheet was put forward,which consists of preferential flotation of lead minerals with CaO as regulator,ZnSO4 as zinc depressant,mixed reagent as collectors,and zinc flotation from the lead tailing using X-41 as activator and butyl xanthate as collector under the condition of low alkali.Using this process,the lead concentrate was successfully separated from the zinc concentrate,and the lead concentrate of 60.32% Pb with a recovery of 77.03% and zinc content of 7.51% and the zinc concentrate of 40.27% Zn with a recovery 78.13% and lead content of 2.47% were obtained.