Beneficiation method for high-clay mixed lead-zinc oxide-sulfide ore

摘要

#$%^&*AU2017101078B420180524.pdf#####ABSTRACT A beneficiation method for high-clay mixed lead-zinc oxide-sulfide ore including the steps of: a. performing ore crushing and/or ball milling of a raw mixed lead-zinc oxide5 sulfide ore to provide a ground ore where 75% or more of the ground ore has a particle size of less than 0.074mm; b. passing the ground ore to an agitator barrel, and carrying out froth flotation to produce a lead concentrate and lead deficient stream; c. passing the lead deficient stream to a zinc sulphide flotation step to obtain 10 a zinc sulfide concentrate and a zinc sulphide deficient stream; d. dewatering and optionally desliming, the zinc sulphide deficient stream and then performing a slurry mixing in a thick pulp procedure by the addition of water and chemical additives to enhance sulfatization on the surface of the zinc oxide ore in the zinc sulphide deficient stream and 15 e. performing froth flotation on the dewatered zinc sulphide deficient stream to obtain a zinc oxide concentrate. The beneficiation method for high-clay mixed lead-zinc oxide-sulfide ore not only enhances the grades of lead and zinc concentrates, but also during beneficiation, reagents and tailings water can be recycled, thereby reducing environmental pollution. 20