Recovery Process of Medium and Low Grade Associated Copper in Silver Mine

Abstract

The invention discloses a recycling process for low-grade associated copper in silver ore. The recycling process comprises the steps of crushing the ore, and feeding water for size mixing to obtain an ore pulp; configuring an efficient combined collecting agent of copper sulfide; feeding the efficient combined collecting agent and a foaming agent to the ore pulp, and carrying out quick copper floating preferably. According to the recycling process for low-grade associated copper in silver ore disclosed by the invention, the efficient collecting agent of copper sulfide is adopted, effective separation of copper sulfide and silver-loaded sulfide mineral is realized under a low-alkaline condition with the pH value of 9 to 10, the recycling rate of the low-grade associated copper in silver ore is improved, the reagent consumption of subsequently leached cyanide of silver concentrate is reduced, and the cyanide leaching rate of silver is improved.

Description

technical field [0001] The invention belongs to the field of non-ferrous metal recovery, and in particular relates to a process for recovering medium and low-grade associated copper from silver mines. Background technique [0002] Mineral resources are a kind of non-renewable resources, which play a very important role in the process of national economic development. With the continuous exploitation and utilization of mineral resources by human beings, the easy-to-select ore resources are decreasing day by day, mainly facing the poor, fine and miscellaneous difficult-to-select resources. The research and development of advanced flotation process and technology for refractory complex silver ore and its associated valuable metal resources is of great significance to make full use of my country's mineral resources, improve resource utilization and economic benefits of mines, and reduce environmental pollution. [0003] Complex low-grade gold-silver mines have low raw ore grade...

AI Technical Summary

Problems solved by technology

However, this process is often enriched in gold and silver concentrates due to the accompanying heavy metals such as copper, lead and zinc, resulting in a low gold and silver cyanide leaching rate, and a large consumption of cyanide, and some even as high as 20 kg per ton of ore , and the copper-lead-zinc sulfide ore in the cyanide slag is strongly inhibited due to fine grinding and long-term action of a large amount of cyanide, and further flotation separation is very difficult

In addition, this kind of ore often has a large content of pyrite, which is the main carrier mineral of silver. If conventional collectors are used to preferentially recover associated copper minerals under high alkali conditions, on the one hand, the silver carrier will be damaged due to high alkali conditions. The strong suppression of mineral iron sulfide minerals will seriously affect the grade and recovery rate of silver concentrate. On the other hand, high alkali conditions will also cause increased chemical consumption, calcium accumulation in pipelines, environmental pollution, deterioration of flotation conditions, and increased beneficiation. cost etc.

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