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Recovery process of complex multi-metal ores difficult to treat

A polymetallic ore, refractory technology, applied in non-metallic elements, process efficiency improvement, inorganic chemistry and other directions, can solve the problems of low recovery rate of valuable elements, environmental pollution, high equipment requirements, and achieve clean process without pollution, The effect of less process hazard and less investment

Active Publication Date: 2015-04-22
KUNMING METALLURGY INST
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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.

Method used

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  • Recovery process of complex multi-metal ores difficult to treat

Examples

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Effect test

Embodiment 1

[0030] A recovery process for refractory complex polymetallic ores, such as figure 1 shown, including the following steps:

[0031] Step (1), oxygen pressure leaching of polymetallic minerals: after ball milling polymetallic minerals, passing through a 320-mesh sieve, adding acid solution to a pressure vessel, adding materials according to the mass ratio of acid solution to polymetallic minerals at 4.5:1, then sealing and passing Add oxygen and heat and stir for leaching. Control the leaching conditions: 150~160°C, oxygen partial pressure 0.8MPa, leaching time 4h, solution pH 1-3; filter after leaching, and analyze the filter residue. Wherein, the acid solution is a zinc extraction raffinate, wherein the concentration of sulfuric acid is 80g / L;

[0032] The comprehensive leaching rates of valuable metals are: Cu96.7%, Zn95.3%, Fe13.4%, and gold, silver, lead, arsenic, and sulfur are basically retained in the leaching residue. The main element contents (%) of the leach slag ...

Embodiment 2

[0046] A recovery process for refractory complex polymetallic ores, such as figure 1 shown, including the following steps:

[0047] Step (1), oxygen pressure leaching of polymetallic ore: after ball milling polymetallic ore, pass through a 320 mesh sieve, add acid solution into the pressure vessel, add material according to the mass ratio of acid solution to polymetallic ore at 4:1, then seal and pass through Add oxygen and heat and stir for leaching. Control the leaching conditions: 170~180°C, oxygen partial pressure 0.5MPa, leaching time 6h, solution pH 1-3; filter after leaching, and analyze the filter residue. Wherein, the acid solution is a zinc extraction raffinate, wherein the concentration of sulfuric acid is 75g / L;

[0048] The comprehensive leaching rates of valuable metals are: Cu96.2%, Zn95.1%, Fe13.0%, and gold, silver, lead, arsenic, and sulfur are basically retained in the leaching residue. The main element contents (%) of the leach slag are: Au11.5g / t, Ag816...

Embodiment 3

[0062] A recovery process for refractory complex polymetallic ores, such as figure 1 shown, including the following steps:

[0063] Step (1), oxygen pressure leaching of polymetallic ore: after ball milling polymetallic ore, pass through a 320-mesh sieve, add acid solution to the pressure vessel, add materials according to the mass ratio of acid solution to polymetallic ore at 5:1, then seal and pass through Add oxygen and heat and stir for leaching. Control the leaching conditions: 160~170°C, oxygen partial pressure 0.2MPa, leaching time 1h, solution pH 1-3; filter after leaching, and analyze the filter residue. Wherein, described acid solution is sulfuric acid aqueous solution, wherein sulfuric acid concentration 80g / L;

[0064] The comprehensive leaching rates of valuable metals are: Cu97.5%, Zn95.8%, Fe14.1%, and gold, silver, lead, arsenic, and sulfur are basically retained in the leaching residue. The main element contents (%) of the leach slag are: Au11.6g / t, Ag817.5...

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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 mineral processing, and in particular relates to a process for comprehensively recovering valuable metals such as copper, lead, zinc, gold, silver and iron from refractory complex polymetallic ores. Background technique [0002] my country is relatively rich in mineral resources, but the proportion of large and super-large deposits is very small, and there are many lean ore, refractory ore and associated ore, especially copper, lead, zinc, iron, aluminum, gold and other lean ore, refractory ore The cost of mining and smelting is generally relatively high, and the proportion of actually available resources is relatively low. With the rapid development of my country's economy, the dependence of per capita GDP on mineral resources continues to increase, coupled with the excessive development of mineral resources in my country, the low comprehensive utilization rate and the increasing difficulty of geological ...

Claims

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Application Information

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IPC IPC(8): C22B3/04C22B3/26C22B11/00C22B15/00C22B19/20C22B13/00C01B17/027
CPCY02P10/20
Inventor 谢刚崔涛李怀仁和晓才彭建蓉袁野徐庆鑫李小英魏可赖浚柯浪徐俊毅
Owner KUNMING METALLURGY INST
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