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...

Examples

Embodiment 1

[0030] A recycling process for difficult and complex polymetallic ore, such as figure 1 As shown, including the following steps:

[0031] Step (1), oxygen pressure leaching of polymetallic ore: After ball milling the polymetallic ore, pass through a 320-mesh sieve, add the acid solution to the pressure vessel, add the material according to the mass ratio of the acid solution to the polymetallic ore at 4.5:1, then seal and pass Enter oxygen and heat and stir for leaching. Control the leaching conditions: 150~160℃, oxygen partial pressure 0.8MPa, leaching time 4h, solution pH value 1-3; after leaching is completed, filter and analyze the filter residue. Wherein, the acid solution is zinc extraction residue, in which the concentration of sulfuric acid is 80g / L;

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

Embodiment 2

[0046] A recycling process for difficult and complex polymetallic ore, such as figure 1 As shown, including the following steps:

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

[0048] The comprehensive leaching rates of valuable metals are respectively: Cu96.2%, Zn95.1%, Fe13.0%, and gold, silver, lead, arsenic, and sulfur are basically retained in the leaching residue. The main element content (%) of t...

Embodiment 3

[0062] A recycling process for difficult and complex polymetallic ore, such as figure 1 As shown, including the following steps:

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

[0064] The comprehensive leaching rates of valuable metals are respectively: Cu97.5%, Zn95.8%, Fe14.1%, and gold, silver, lead, arsenic, and sulfur are basically retained in the leaching residue. The main element con...

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...

Examples

Embodiment 1

[0030] A recycling process for difficult and complex polymetallic ore, such as figure 1 As shown, including the following steps:

[0031] Step (1), oxygen pressure leaching of polymetallic ore: After ball milling the polymetallic ore, pass through a 320-mesh sieve, add the acid solution to the pressure vessel, add the material according to the mass ratio of the acid solution to the polymetallic ore at 4.5:1, then seal and pass Enter oxygen and heat and stir for leaching. Control the leaching conditions: 150~160℃, oxygen partial pressure 0.8MPa, leaching time 4h, solution pH value 1-3; after leaching is completed, filter and analyze the filter residue. Wherein, the acid solution is zinc extraction residue, in which the concentration of sulfuric acid is 80g / L;

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

Embodiment 2

[0046] A recycling process for difficult and complex polymetallic ore, such as figure 1 As shown, including the following steps:

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

[0048] The comprehensive leaching rates of valuable metals are respectively: Cu96.2%, Zn95.1%, Fe13.0%, and gold, silver, lead, arsenic, and sulfur are basically retained in the leaching residue. The main element content (%) of t...

Embodiment 3

[0062] A recycling process for difficult and complex polymetallic ore, such as figure 1 As shown, including the following steps:

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

[0064] The comprehensive leaching rates of valuable metals are respectively: Cu97.5%, Zn95.8%, Fe14.1%, and gold, silver, lead, arsenic, and sulfur are basically retained in the leaching residue. The main element con...

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