Method for treating anode mud by swirl electrolysis

A swirling electrolysis and anode slime technology, which is applied to the improvement of process efficiency, photography process, instruments, etc., can solve the problems of cumbersome process, increased economic loss of enterprises, and large amount of reagents, so as to avoid environmental pollution and improve the quality of purified metal. , The effect of preventing acid mist overflow and leakage

Active Publication Date: 2013-11-20
浙江科菲科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, in the process of wet treatment of anode slime, it is necessary to use precipitant or extractant to separate metals. The amount of reagents is large and the process is cumbersome, which increases the economic loss of the enterprise. Therefore, it is necessary to study the method of selectively recovering silver and copper from anode slime. It is an important topic in the process of anode slime treatment

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  • Method for treating anode mud by swirl electrolysis

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Effect test

Embodiment 1

[0034] Take 1000g of anode slime, add nitric acid to slurry according to the liquid-solid ratio of nitric acid and anode slime at 5:1 (ml / g), wherein the concentration of nitric acid is 220g / L, react at 75°C for 3h, and filter to obtain silver copper Leachate;

[0035] The silver-copper leaching solution is filtered with a ceramic membrane precision filter to remove impurities, and the filter residue is returned to step 1) to be mixed with raw materials, and the filtrate is set aside;

[0036] The filtrate enters the cyclone electrolytic cell for electrolytic silver removal, and the pH value of the electrolyte is controlled to be 1.8, and the current density is 700A / m 2 , the electrolysis cycle rate is 300L / h, after continuous electrolysis for 2 hours, silver powder and desilvered solution are obtained, silver powder is washed and dried to obtain 125g of silver powder;

[0037] After desilvering, the liquid is desilvered by two-stage cyclone electrolysis, and the electrolysis...

Embodiment 2

[0040] Take 1000g of anode slime, add nitric acid to slurry according to the liquid-solid ratio of nitric acid and anode slime at 3:1 (ml / g), wherein the concentration of nitric acid is 200g / L, react at 65°C for 4h, filter to obtain silver copper Leachate;

[0041] The silver-copper leachate is finely filtered with a precision filter to remove impurities, and the filter residue is returned to step 1) to be mixed with raw materials, and the filtrate is used for standby;

[0042] The filtrate enters the cyclone electrolytic cell for electrolytic silver removal, and the pH value of the electrolyte is controlled to be 1.5, and the current density is 600A / m 2 , the electrolysis cycle rate is 250L / h, after continuous electrolysis for 2 hours, silver powder and desilvered solution are obtained, silver powder is washed and dried to obtain 100g of silver powder;

[0043] After desilvering, the liquid is desilvered by two-stage cyclone electrolysis, and the electrolysis parameters are:...

Embodiment 3

[0046] Take 1000g of anode slime, add nitric acid to slurry according to the liquid-solid ratio of nitric acid and anode slime at 7:1 (ml / g), wherein the concentration of nitric acid is 250g / L, react at 85°C for 2.5h, filter to obtain silver copper leaching solution;

[0047] The silver-copper leachate is finely filtered with a precision filter to remove impurities, and the filter residue is returned to step 1) to be mixed with raw materials, and the filtrate is used for standby;

[0048] The filtrate enters the cyclone electrolytic cell for electrolytic silver removal, and the pH value of the electrolyte is controlled to be 2.0, and the current density is 800A / m 2 , the electrolysis cycle rate is 400L / h, after continuous electrolysis for 2 hours, silver powder and desilvered solution are obtained, silver powder is washed and dried to obtain 128g of silver powder;

[0049] After desilvering, the liquid is desilvered by two-stage cyclone electrolysis, and the electrolysis para...

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Abstract

The invention discloses a method for treating anode mud by swirl electrolysis, belonging to the technical field of nonferrous metals hydrometallurgy and resource regeneration recycling. In the method, the anode mud is used as the raw material, after being leached with nitric acid, the anode mud is filtered by a precise filtering device, then, nitric acid solution containing silver and copper is obtained; the nitric acid solution containing silver and copper is treated by desilverization through two sections of swirl electrolysis, then, silver powder is obtained, after the silver powder is collected, the silver powder is washed with pure water and dried, the desilverized barren liquor sequentially enters into a swirl electrolysis system so as to be treated by electrolysis for copper removal, thus, cathode copper is obtained. The treatment method provided by the invention efficiently recycles metals, turns waste into wealth, and realizes recycling of resources; by the swirl electrolysis technology, metals can be selectively treated by electrolytic deposition, and the silver and the copper can be purified better; the current density and the current efficiency both are higher, reagent consumption is low, the production cost is reduced, and the benefits of enterprises are improved; meanwhile, the solution is circulated in closed loop, emission of harmful gas is avoided, so that the method meets the current concept of circular economy and environment protection.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal hydrometallurgy and resource regeneration and recovery, and in particular relates to a method for treating anode slime by using cyclone electrolysis. Background technique [0002] The anode slime produced in the copper electrolytic refining process has become an important material for extracting precious metals because it contains a large amount of precious metals and rare elements. There are mainly two methods for extracting precious metals from anode slime: fire method and wet method; the fire method process is characterized by mature technology, easy operation and control, strong adaptability to materials, and suitable for large-scale centralized production Poor operating environment, serious pollution, long production cycle, lack of comprehensive utilization of valuable metals and many other problems are facing challenges. Especially for small and medium-sized enterprises, the investm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C5/02C25C1/12
CPCY02P10/20
Inventor 邓涛门海芬陈东达佟永明林元吉
Owner 浙江科菲科技股份有限公司
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