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A Flotation Method for Comprehensive Recovery of Copper and Gold from Copper Slag

A technology for tailings and copper selection, applied in flotation, solid separation and other directions, can solve the problems of low copper grade and recovery rate of concentrates, weathering and oxidation of sulfide minerals, waste of copper tailings resources, etc., and improve the gold recovery rate. , the effect of improving surface properties and easy industrialization

Active Publication Date: 2020-07-24
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Copper slag is the waste slag after flotation of copper ore. Its composition is complex. After long-term storage, it will cause weathering and oxidation of sulfide minerals. Minerals, and after the gangue is muddy, it will make it difficult to select copper tailings, and the copper grade and recovery rate of the concentrate obtained by the conventional flotation process are low
At present, the copper grade of copper concentrate obtained from copper slag by conventional flotation process is 10-15%. For some extremely difficult tailings, the grade of copper concentrate is even lower than 10%, and the copper recovery rate is 50%. -75%, gold is enriched in copper concentrate, and the waste of copper slag resources is serious

Method used

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  • A Flotation Method for Comprehensive Recovery of Copper and Gold from Copper Slag
  • A Flotation Method for Comprehensive Recovery of Copper and Gold from Copper Slag
  • A Flotation Method for Comprehensive Recovery of Copper and Gold from Copper Slag

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Embodiment 1

[0027] In this embodiment, the flotation method for comprehensive recovery of copper and gold from the copper tailings is adopted. figure 1 The technological process in the process selects a certain copper tailings, the grade of the copper tailings is 0.39% copper, 28% copper oxidation rate; 0.27 g / t gold, 3.05% sulfur, 12.35% iron, of which hematite The content of iron in ore and limonite is 5.07%, the content of magnesium oxide in gangue minerals is 15.32%, and the content of calcium oxide in gangue minerals is 11.86%. The specific implementation steps are as follows:

[0028] (1) Grind the copper beneficiation tailings until the ore particles with a particle size of less than 0.074mm account for 85% of the total weight of the copper beneficiation tailings. After grinding, add water to adjust the slurry to a mass percentage concentration of 28%. Add lime when grinding 3Kg / t;

[0029] (2) Add 200 g / t of sodium sulfide and 1600 g / t of TK309 combination regulator to the pulp ...

Embodiment 2

[0049] In this embodiment, the flotation method for comprehensive recovery of copper and gold from the copper tailings is adopted. figure 1 The technological process in the selection of copper tailings, the grade of copper tailings in weight percentage is 0.53% copper, copper oxidation rate 37%; gold 0.18 g / t, sulfur 3.26%, iron 10.79%, of which hematite The content of iron in ore and limonite is 4.87%, the content of magnesium oxide in gangue minerals is 11.48%, and the content of calcium oxide in gangue minerals is 9.50%. The specific implementation steps are as follows:

[0050] (1) Grind the copper beneficiation tailings until the ore particles with a particle size of less than 0.074mm account for 80% of the total weight of the copper beneficiation tailings. After grinding, add water to adjust the slurry to a mass percentage concentration of 30%. Add lime when grinding 2Kg / t;

[0051] (2) Add 100 g / t of sodium sulfide and 1000 g / t of TK309 combination regulator to the pu...

Embodiment 3

[0071] In this embodiment, the flotation method for comprehensive recovery of copper and gold from the copper tailings is adopted. figure 1 The technological process in the selection of copper tailings, the grade of copper tailings is 0.25% copper; copper oxidation rate 18%; gold 0.47g / t, sulfur 2.94%, iron 13.65%, of which hematite The content of iron in ore and limonite is 5.98%, the content of magnesium oxide in gangue minerals is 15.43%, and the content of calcium oxide in gangue minerals is 12.30%. The specific implementation steps are as follows:

[0072] (1) Grind the copper beneficiation tailings until the ore particles with a particle size of less than 0.074mm account for 95% of the total weight of the copper beneficiation tailings. After grinding, add water to adjust the slurry to a mass percentage concentration of 25%. Add lime when grinding 4.5Kg / t;

[0073] (2) Add 300 g / t of sodium sulfide and 1700 g / t of TK309 combination regulator to the pulp ground in step (...

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Abstract

The invention discloses a flotation method for comprehensively recovering copper gold from copper tailings, and belongs to the technical field of flotation. The flotation method comprises the following steps that copper tailings are ground, flotation reagents which comprise lime, sodium sulphide, TK309 regulators, sodium n-butylxanthat, O-isoamyl-N-allyl sulfo-carbamic acid ester, methyl isobutylcarbinol and other flotation reagents are added for slurry mixing, primary rough selection, three-time scavenging, three-time concentration and fine scavenging operation are sequentially carried out,and finally copper ore concentrate is obtained. The copper grade is improved by 3-5% compared with a conventional flotation method, and the copper recovery rate is improved by 4-6%. The associated gold content reaches above the pricing grade (1g / t), and the gold recovery rate is improved by 4-10%. According to the flotation method, the problems that the stockpiling time is long, the components arecomplex, the particle size of the useful mineral embedding cloth is fine, the weathering oxidation of the vulcanized minerals and the mineralization of the gangue minerals are serious, and the coppertailings contain easily-floating iron minerals and calcium-magnesium gangue are solved, the copper concentrate copper, the gold grade and the recovery rate are remarkably improved, and the waste of copper and gold resources is reduced.

Description

technical field [0001] The invention relates to the technical field of flotation, in particular to a flotation method for comprehensively recovering copper and gold from copper-separation tailings. Background technique [0002] Copper ores mostly contain associated gold, and the associated gold reserves in my country account for 38.49% of the total gold reserves, of which 90% come from copper mines and 10% from lead-zinc mines. Therefore, by selecting copper, in addition to recovering metallic copper, usually associated gold can also be recovered. With the continuous development of copper resources, the amount of copper resources is decreasing day by day, and the grade of copper ore is gradually decreasing. At the same time, due to the rapid development of my country's social economy, the consumption of metal copper is increasing. At present, my country's self-produced copper production is far from meeting the demand. Part of the copper production comes from the domestic s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00
CPCB03D1/00
Inventor 黄建芬余江鸿吴斌周涛黄国贤徐飞飞孙科峰
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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