Extraction method of valuable metal in copper anode mud

An extraction method, copper anode slime technology, which is applied in the field of non-ferrous metallurgy, can solve the problems of long process flow and complicated operation, and achieve the effect of short process flow, simple operation and effective recovery

Inactive Publication Date: 2019-06-28
JIANGXI COPPER
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Problems solved by technology

However, there are long technological processes and complex operations in the prior art

Method used

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  • Extraction method of valuable metal in copper anode mud

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The main components of copper anode slime are (%) by weight: Cu 21.35, As 5.34, Au 0.35, Ag 8.96, Te1.60, Se 4.80, Pb 8.14, Sb 4.85, Bi 2.21.

[0039] Prepare a sodium hydroxide solution with a concentration of 50g / L, add copper anode slime to the prepared sodium hydroxide solution at a liquid-to-solid ratio of 6:1, control the reaction temperature at 85°C, stir for 4 hours, and arsenic is leached into the solution. Filter to obtain arsenic immersion solution and arsenic leaching residue. The arsenic leaching solution contains 8.82g / L arsenic, and the arsenic leaching rate is 99.02%.

[0040] The arsenic leaching slag is added to the sulfuric acid solution according to the liquid-solid ratio of 6:1, the acidity of the initial reaction sulfuric acid is 350g / L, and the blowing intensity is 0.6kg / cm 3 , the reaction temperature was 65°C, the reaction oxidation potential was controlled at 380mv, and stirred for 10h. Filter, leaching copper solution and leaching copper sla...

Embodiment 2

[0045] The main components of copper anode slime are (%) by weight: Cu 19.85, As 5.86, Au 0.32, Ag 8.01, Te1.24, Se 3.65, Pb 8.95, Sb 4.79, Bi 2.36.

[0046] Prepare a sodium hydroxide solution with a concentration of 60g / L, add copper anode slime to the prepared sodium hydroxide solution at a liquid-to-solid ratio of 5:1, control the reaction temperature at 85°C, stir for 4 hours, and arsenic is leached into the solution. Filter to obtain arsenic immersion solution and arsenic leaching residue. The arsenic leaching solution contained 11.58g / L of arsenic, and the arsenic leaching rate was 98.81%.

[0047] The arsenic leaching slag is added to the sulfuric acid solution according to the liquid-solid ratio of 6:1. The acidity of the initial reaction sulfuric acid is 350g / L, the blowing intensity is 0.5kg / cm3, the reaction temperature is 70°C, the reaction oxidation potential is controlled at 400mv, and stirred for 10h. Filter, leaching copper solution and leaching copper slag. ...

Embodiment 3

[0052] The main components of copper anode slime are (%) by weight: Cu 12.58, As 7.89, Au 0.38, Ag 9.48, Te2.03, Se 5.64, Pb 10.12, Sb 9.85, Bi 7.55.

[0053] Prepare a sodium hydroxide solution with a concentration of 60g / L, add copper anode slime to the prepared sodium hydroxide solution at a liquid-to-solid ratio of 5:1, control the reaction temperature at 85°C, stir for 4 hours, and arsenic is leached into the solution. Filter to obtain arsenic immersion solution and arsenic leaching residue. The arsenic leaching solution contains 15.63g / L arsenic, and the arsenic leaching rate is 99.05%.

[0054] The arsenic leaching slag is added to the sulfuric acid solution according to the liquid-solid ratio of 6:1. The acidity of the initial reaction sulfuric acid is 350g / L, the blowing intensity is 0.5kg / cm3, the reaction temperature is 70°C, the reaction oxidation potential is controlled at 400mv, and stirred for 10h. Filter, leaching copper solution and leaching copper slag. The...

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Abstract

The invention aims to provide an extraction method of valuable metal in copper anode mud. The extraction method of the valuable metal in the copper anode mud comprises the steps of adding the copper anode mud into a sodium hydroxide solution according to the liquid-solid ratio, controlling the reaction temperature and the reaction time, effectively leaching arsenic, and obtaining an arsenic leaching solution and arsenic leaching residues; adding the arsenic leaching residues into a sulfuric acid solution according to the liquid-solid ratio, feeding air, controlling a reaction oxidation potential and the reaction temperature, stirring, filtering, and obtaining a copper leaching solution and copper leaching residues; adding hydrochloric acid, sulfuric acid and sodium chloride into the copperleaching residues, controlling the reaction acidity and the reaction time, and obtaining a chlorination solution and a gold-silver concentrate; maintaining the reaction temperature, adding dilute alkalis into the chlorination solution for neutralizing, controlling the reaction oxidation potential, and obtaining a primary neutralization solution and an antimony concentrate; and maintaining the reaction temperature, adding dilute alkalis into the primary neutralization solution, controlling the reaction oxidation potential, and obtaining a post-neutralization solution and a bismuth concentrate.By adopting the technical scheme, arsenic, copper, antimony and bismuth are effectively recycled.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal metallurgy, in particular to a method for extracting valuable metals from copper anode slime. Background technique [0002] Copper anode slime is an intermediate product of the copper electrolytic refining process. In addition to precious metals such as gold, silver, platinum, and palladium, it also contains a large amount of impurity metals such as copper, arsenic, antimony, and bismuth. Various smelting companies have carried out a lot of research on the comprehensive recovery of copper anode slime. How to turn the impurity metal in copper anode slime into treasure has attracted more and more attention from the industry. However, in the prior art, the process flow is long and the operation is complicated. Contents of the invention [0003] The main purpose of the present invention is to provide a method for extracting valuable metals in copper anode slime, so as to solve any of the a...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B30/04C22B30/02C22B30/06C22B15/00C22B11/06
CPCY02P10/20
Inventor 刘永平黄绍勇雷刚张剑徐康
Owner JIANGXI COPPER
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