Method for recovering copper through copper anode mud supersonic pretreatment

A copper anode slime and ultrasonic technology, applied in the field of hydrometallurgy, can solve the problems of low copper removal rate, environmental pollution, long reaction time, etc., and achieve the effects of high leaching rate, cost reduction and fast reaction rate

Inactive Publication Date: 2013-09-25
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The recovery of sulfur dioxide produced in the roasting process in the pyrotechnic process and the resulting environmental pollution are still a technical problem; while the atmospheric acid leaching copper removal process can not produce sulfur dioxide, but because the reaction temperature of the air oxidation method cannot be very high, the highest It does not exceed 90°C, so the reaction intensity is weak and the reaction time is long. It takes 24 hours or even longer to complete the copper removal task, and the copper removal rate is only about 60~70%.
[0004] In order to solve the problems of slow speed, low efficiency and lo

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Add water to the copper anode slime for coarse slurry adjustment, sieve out sand impurities with a particle diameter greater than 5mm, drain the water, and add sulfuric acid with a concentration of 400g / L to the drained copper anode slime for slurry adjustment , control the weight concentration of copper anode mud slurry at 5%;

[0030] (2) Place the obtained copper anode slurry in an ultrasonic generator, pass compressed air into the copper anode slurry, adjust the ultrasonic frequency to 40kHz, and the power to 500w, and leaching at 20°C under normal pressure for 90min, copper Copper in anode slime as CuSO 4 Form leaching.

[0031] After leaching, the leaching rate of copper was analyzed to be 95.5%.

Embodiment 2

[0033] (1) Add water to the copper anode slime for coarse slurry adjustment, sieve out sand impurities with a particle diameter greater than 5mm, drain the water, and add sulfuric acid with a concentration of 50g / L to the drained copper anode slime for slurry adjustment , control the weight concentration of copper anode mud slurry at 20%;

[0034] (2) Put the obtained copper anode slurry in an ultrasonic generator, add H to the copper anode slurry 2 o 2 , H 2 o 2 The dosage is 1molH 2 o 2 / per liter of slurry, adjust the ultrasonic frequency to 20kHz, power to 1000w, leaching at 65°C under normal pressure for 60min, the copper in the copper anode slime is replaced by CuSO 4 Form leaching.

[0035] After leaching, the leaching rate of copper was analyzed to be 98.1%.

Embodiment 3

[0037] (1) Add water to the copper anode slime for coarse slurry adjustment, sieve out sand impurities with a particle diameter greater than 5mm, drain the water, and add sulfuric acid with a concentration of 200g / L to the drained copper anode slime for slurry adjustment , control the weight concentration of copper anode mud slurry at 1%;

[0038] (2) Put the obtained copper anode slurry in an ultrasonic generator, add H to the copper anode slurry 2 o 2 , H 2 o 2 The dosage is 0.05molH 2 o 2 / per liter of slurry, adjust the ultrasonic frequency to 30kHz, power to 2000w, leaching at 90°C for 30min under normal pressure, the copper in the copper anode slime is replaced by CuSO 4 Form leaching.

[0039] After leaching, the leaching rate of copper was analyzed to be 97.4%.

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PUM

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Abstract

The invention belongs to the field of wet metallurgy, and specifically relates to a method for recovering copper through a copper anode mud supersonic pretreatment. According to the invention, sulfuric acid with concentration of 50-400g/L is added to copper anode mud, such that slurry is prepared; the copper anode mud slurry is placed in a supersonic wave generator; an oxidant is added into the copper anode mud slurry; supersonic frequency is regulated to 20-40kHz, a power is 500-4000w, and leaching is carried out for 30-90min under normal pressure and a temperature of 20-90 DEG C. With the method, a problem of long leaching time and generally low leaching rate of prior art are overcome. Compared with the leaching rate with no supersonic treatment, the leaching rate is improved by more than 10-30%, and a copper leaching rate reaches 93-99%.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy, and in particular relates to a copper anode slime ultrasonic pretreatment method for recovering copper. Background technique [0002] When copper is electrolytically refined, the copper on the anode and the base metal with negative potential dissolve into the solution under the action of direct current, while the rare precious metal sinks to the bottom of the tank due to its high dissolution potential to become anode slime. The pretreatment of anode slime is to dissociate the non-precious metal elements in the anode slime that will significantly affect the subsequent separation process and be easily separated. This will not only enrich the rare and precious metal elements, but also facilitate the recovery of other valuable elements. Copper occupies a large proportion in copper anode slime, and its presence has a significant impact on the subsequent separation of precious metals, so it needs to be ...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B15/00
CPCY02P10/20
Inventor 杨洪英陈国宝马致远佟琳琳吕阳
Owner NORTHEASTERN UNIV
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