Method for using cyaniding barren solution to float, reclaim and cyaniding copper plumbum and zinc in tailings

Abstract

A method that cyanide barren solution is used for recovering the copper-lead-zinc from cyanide tailing by means of floatation belongs to the field of nonferrous metal separation. The processing procedures of the method are as following: (1) mashing: the cyanide barren solution is added into the cyanide tailing and stirred to ore slurry, the concentration of which is 35 to 40 per cent; (2) lead-zinc preferential flotation: after being stirred, the ore slurry is put into flotation machine and lime, Ethyl thiocarbamate and Sodium n-butyl xanthate synthetic are added in to the ore slurry. The course of once rough floatation, twice scavenging and twice concentration is processed to recover Zinc and Lead; (3) Cu-S separation: after the tailing of lead and zinc bulk flotation is concentrated, the cyanide barren solution is added into the tailing and the tailing is made into the ore slurry with the concentration of 35 to 40 per cent. And then, the ore slurry is put into the floatation machine and sulfate, sodium sulfite, Z-200 and ammonium butyl aerofloat are added into the tailing. The course of once rough floatation, twice scavenging and twice concentration is processed to recover copper. And the tailing can be for sale as sulfur concentrate; (4) Reuse of separation tailing water: the press filtrate of bulk concentrate, the overflow of thickener, the press filtrate of copper concentrate and the press filtrate of the sulfur concentrate return to the buffer slot of the cyanide barren solution to be used for replacement fluid. The invention has the advantages of good flotation effect, high recovery rate of the copper-lead-zinc and zero discharge of waste water and residue.

Description

technical field [0001] The invention belongs to the field of non-ferrous metal beneficiation, and relates to a method for recovering copper, lead and zinc in cyanide tailings by using cyanide barren liquor flotation. Background technique [0002] Mineral resources are non-renewable and irreplaceable. More than 90% of my country's energy and about 80% of industrial raw materials come from mineral resources. With the massive development and utilization of mineral resources, the demand is increasing day by day, and the resources are becoming increasingly scarce. Tailings, as a secondary resource, have received more and more attention in recent years. Vigorously develop tailings, minimize waste discharge, realize the closed-loop material flow mode of "resource consumption-product-renewable resources", so that secondary resources can be fully developed and utilized, which is in line with the basic principles of circular economy, It also protects and improves the ecological envi...

AI Technical Summary

Problems solved by technology

So far, there is no report on the recovery of valuable metals in cyanide tailings by using cyanide barren liquor flotation

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