Beneficiation Techniques Optimization and Production Practice of Refractory Multimetallic Copper-Lead-Zinc Ore

Based on the process mineralogy study for a refractory multimetallic ore and an analysis of the currently used processing flowsheet and technical conditions,flowsheet and reagent system were renovated accordingly to solve the existing problems.A flowsheet consisting of selective flotation of copper and successive beneficiation of lead and zinc from copper flotation tailings was selected,while reagents with excellent performance,such as copper collector YK1-11 and galena depressant YK3-09,were chosen.As a result,a copper concentrate with Cu grade of 16.16%,a lead-zinc bulk concentrate with a grade of 55.39% and a zinc concentrate with Zn grade of 45.52% were prepared,while the corresponding Cu,Pb and Zn recoveries were markedly increased.This study provides a new approach for the exploitation and utilization of Cu-Pb-Zn ore resources.