The effects of ultrafine grinding size and concentration on the re-copper index of zinc tailings were studied.Flota-tion tests at different ultrafine grinding sizes(80％-32 μm,80％-29 μm,80％-20 μm,80％-15 μm)and different ul-trafine grinding concentrations(38％,43％,47％)revealed that the reduction of ultrafine grinding size increased the Cu grade of copper concentrate in general.Especially at 80％-20 μm,the grade is 3.96％and the recovery is 29.02％.Ultra-fine grinding can lead to reduced recovery.The increase of ultrafine grinding concentration has a significant effect on the grade and recovery of copper concentrate,of which 43％grinding concentration shows the best copper recovery effect.
copper-zinc polymetallic oreflotationultrafine grindingzinc tailingsreconcentration of copper
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