Recovery of lead and zinc from sulfide lead-zinc ore by"priority lead selection-zinc recovery from lead tailings"
The main valuable elements in a lead zinc sulphide mine in Inner Mongolia are Pb and Zn,with grade of 0.90％and 3.23％,respectively.Detailed process mineral research was conducted on the ore using chemical analysis,XRD analysis,and MLA analysis methods,followed by conditional and closed-circuit tests based on the process mineralogy research.The results of process mineralogy analysis show that galena and sphalerite are the main target minerals in this mine,mainly distributed in a sparse-dense disseminated form between gangue minerals.The embedding characteristics are relatively complex,with low local enrichment and uneven embedding particle size.Some galena is encapsulated in sphalerite,adversely affecting subsequent flotation operations.The main gangue minerals are calcium iron pyroxene,quartz,calcite,epidote,calcium aluminium garnet,plagioclase,and potassium feldspar,with small amounts of chlorite,muscovite,and biotite.The closed-circuit flotation process of prioritizing lead selection,followed by zinc recovery from lead tailings,and sequentially returning to the previous operation for flotation can ultimately obtain qualified lead concentrate products with a Pb grade of 66.83％and a Pb recovery rate of 85.42％,as well as qualified zinc concentrate products with a Zn grade of 53.26％and a Zn recovery rate of 91.53％.This demonstrated effective utilization of the sulphide lead-zinc sulfide ore.
lead-zinc sulfide oreprocess mineralogyflotationpriority lead selectionzinc flotation from lead tailingsmiddlings returnclosed-circuit test
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