A Recycling Process of Refractory and Complex Polymetallic Ore

Abstract

The invention discloses a recovery process of complex multi-metal ores difficult to treat and belongs to the technical field of ore dressing. According to the process, the complex multi-metal ores difficult to treat are taken as the raw materials, products such as gold, silver, copper, zinc, sulfur, lead concentrate and iron slag are extracted by virtue of the steps of ore fine grinding, high-temperature oxidative pressure leaching, copper and zinc recovery by extraction, gold and silver recovery by virtue of thiourea leaching, and lead, iron and sulfur separation by ore separation, and comprehensive recovery of the multi-metal gold ores is realized. The recovery process of the complex multi-metal ores difficult to treat is mainly characterized in that the high-temperature oxidative pressure leaching is performed on the complex multi-metal ores difficult to treat after fine grinding, copper and zinc in the leachate are recovered by use of an extraction-electrodeposition technique, and the extraction residual liquid is returned to oxidative pressure leaching, gold and silver are extracted from the oxidative pressure leaching slag by use of a thiourea leaching-reduction process, and sulfur, lead concentrate and iron slag are obtained from the thiourea leaching slag by use of an ore separation process, respectively. The recovery process is used for comprehensively recovering gold, silver, copper, zinc and the like, has the characteristics of high valuable metal recovery rate, low energy consumption, low cost, closed-loop solution circulation and the like, and is suitable for industrial production.

Description

Technical field [0001] The invention belongs to the technical field of beneficiation, and specifically relates to a process for comprehensively recovering valuable metals such as copper, lead, zinc, gold, silver, iron, etc. from difficult-to-treat complex polymetallic ore. Background technique [0002] my country's mineral resources are relatively rich, but the proportion of large and super large deposits is very small, and there are many lean ores, refractory ores and associated ores, especially copper, lead, zinc, iron, aluminum, gold and other lean ores. The cost of mining and smelting is generally relatively high, and the actual available resource ratio is low. With the rapid development of my country’s economy, the per capita GDP’s dependence on mineral resources has continued to increase, coupled with my country’s excessive development of mineral resources, low comprehensive utilization and increasing difficulty in geological exploration, leading to sustainable mineral resou...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an economical, effective and environmentally friendly recovery process for refractory complex polymetallic ores, which is an organic combination of high-temperature oxygen pressure leaching, solvent extraction, electrowinning, and mineral processing. It mainly solves the problems of low recovery rate of valuable elements, arsenic and sulfur in the existing treatment process of complex polymetallic ore, which may easily cause environmental pollution and high equipment requirements.

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