Comprehensive recovery method of complex polymetal sulphide ore containing copper, lead and zinc

Abstract

The invention discloses a comprehensive recovery method of complex polymetal sulphide ore containing copper, lead and zinc and adopts dressing-metallurgy combination method and hydrometallurgy-pyrometallurgy combination method to recover metals. The recovery method comprises the following steps: first performing bulk flotation to the complex polymetal sulphide ore, fine grinding the obtained concentrate, leaching by using two-step counter flow oxygen pressure leaching process, extracting and separating copper and zinc from the obtained leachate, electrodepositing the strip liquor of copper-loaded organic phase to obtain cathode copper, cleaning the obtained raffinate and electrodepositing to obtain cathode zinc; pressurizing leaching residue to perform flotation separation and obtain sulfur concentrate and lead silver residue, distilling sulfur concentrate to obtain sulfur; performing lead smelting process to lead silver residue to obtain electrolytic lead product and lead anodic slime; and comprehensively recovering noble metals such as gold, silver and the like from lead anodic slime. The method can greatly improve the metal recovery rate, resource utilization and the economic efficiency of mines and generate a lot of sulfur so as to obviously reduce the sulfur dioxide pollution to the atmosphere.

Description

technical field [0001] The invention relates to a comprehensive recovery method for mineral materials, in particular to a comprehensive recovery method for complex copper-lead-zinc-silver polymetallic sulfide ores. Background technique [0002] This sulfide ore is a complex polymetallic ore unique to "Three Rivers Source". Similar buoyancy, difficult to separate. Many domestic flotation tests have proved that the priority flotation process not only has a low recovery rate of main metals, but also has high mutual content of each metal in the sorted copper concentrate, lead concentrate, and zinc concentrate, and the quality is unqualified. Therefore, it is an effective way to process this kind of ore by using mixed flotation to obtain mixed concentrate, and then using smelting to separate the metals. [0003] However, there is no production practice at home and abroad for direct smelting of copper-lead-zinc mixed concentrate. Some domestic scientific research institutes hav...

AI Technical Summary

Problems solved by technology

When the mixed concentrate is treated with one-stage oxygen pressure leaching process, a large amount of elements such as iron and arsenic in the concentrate are also leached, and the concentration of residual acid in the leach solution is high, which increases the difficulty of subsequent processing and production costs

The roasting process will produce a large amount of low-concentration SO 2 It is not conducive to the recovery of sulfur and environmental protection. The heat released by the oxidation of sulfur is difficult to effectively use, and because the added value of sulfuric acid is not high, it is not suitable for long-distance transportation, which puts forward higher requirements for the selection of smelting plant sites

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