Treatment method of waste silver electrolyte

A technology for electrolysis waste liquid and treatment method, which is applied in the directions of metallurgical waste water treatment, electrolysis process, electrolysis components, etc., can solve the problems of increasing the consumption of reagents and labor intensity, and achieve the effect of avoiding scattered discharge and improving the working environment.

Active Publication Date: 2011-04-13
JINCHUAN GROUP LIMITED
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the silver electrolysis waste liquid usually contains copper ions and silver ions and cannot be discharged directly, in order to recover the valuable metals, it is necessary to

Method used

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  • Treatment method of waste silver electrolyte
  • Treatment method of waste silver electrolyte

Examples

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Example Embodiment

[0032] Example 1

[0033] Swirl electrolysis of 450L silver electrolysis waste liquid with a silver ion concentration of 73.56g / L. First carry out impurity removal, during the impurity removal process, control the circulation flow of the silver electrolyte waste liquid to 3m 3 / h, current density is 400 A / m 2 , Remove impurities for 3h, and then conduct electrowinning of electrolytic silver powder. During the electrowinning process, control the circulating flow of the liquid after the removal of impurities to 3.5m 3 / h, current density is 350 A / m 2 , Electrowinning 35h, check the electrowinning solution, if the concentration of silver ions in the electrowinning solution is less than 1g / L, stop the electrowinning; after that, deep purification of the electrowinning solution, and control the circulating flow of the electrowinning solution as 7m 3 / h, current density is 400 A / m 2 , Purify for 6 hours, complete the treatment of the silver electrolyte waste. After testing, the silver...

Example Embodiment

[0034] Example 2

[0035] Swirl electrolysis 460L silver electrolysis waste liquid with a silver ion concentration of 60.86g / L. First carry out impurity removal, during the process of impurity removal, control the circulation flow of the silver electrolyte waste liquid to 1m 3 / h, current density is 200 A / m 2 , Remove impurities for 5h; then proceed to electrowinning of electrolytic silver powder, and control the circulating flow of the liquid after removing impurities to 2m during the electrowinning process 3 / h, current density is 200 A / m 2 , After electrowinning for 45h, check the electrowinning solution. If the concentration of silver ions in the electrowinning solution is lower than 1g / L, stop the electrowinning; after that, carry out deep purification of the electrowinning solution and control the circulation flow of the electrowinning solution as 5m 3 / h, current density is 300 A / m 2 , Purify for 8 hours, complete the treatment of the silver electrolyte waste. After testi...

Example Embodiment

[0036] Example 3

[0037] Swirl electrolysis 440L silver electrolysis waste liquid with a silver ion concentration of 68.72g / L. First carry out impurity removal, during the impurity removal process, control the circulating flow of the silver electrolyte waste liquid to 2m 3 / h, current density is 300 A / m 2 ,Impurity removal 4h; Then electrowinning of electrolytic silver powder is carried out, and the circulating flow of the liquid after impurity removal is controlled to 5m during the electrowinning process 3 / h, current density is 500 A / m 2 , After electrowinning for 30 hours, check the electrowinning solution. If the concentration of silver ions in the electrowinning solution is lower than 1g / L, stop the electrowinning; after that, perform deep purification of the electrowinning solution and control the circulating flow of the electrowinning solution as 3m 3 / h, current density is 200 A / m 2 , Purify for 10 hours, complete the treatment of the silver electrolyte waste. After te...

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Abstract

A treatment method of waste silver electrolyte is a technology which uses the cyclone electrolysis technology to extract valuable metals from waste silver electrolyte and ensures that the treated liquid meets the wastewater discharge standard. The treatment method adopts a circulation loop containing serial cyclone electrolytic cells and comprises the following steps: waste silver electrolyte is sent from the cell bottom to the serial cyclone electrolytic cells, impurities are removed by adopting low current density and medium flow; electrolytic silver powder is extracted from the purified liquid under the conditions of low current density and medium flow; and advanced purification is performed to the electrolyzed liquid to ensure that the treated waste liquid meets the wastewater discharge standard. By adopting the treatment method in the invention, silver ions in the waste silver electrolyte can be effectively recycled, electrolytic silver powder of which main grade is 98-99% is generated; the electrolyzed liquid meets the wastewater discharge standard; in the back stage of electrolysis, the quality of the electrolytic silver product can meet the requirements of the 1# silver in GB/T4135-2002; and the solution is in closed cycle, thus the dispersions and emissions of acid mist and harmful gases can be avoided, the method is safe and environment-friendly, and the working environment can be improved.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy technology, and relates to a treatment method for silver electrolysis waste liquid, which can effectively recover silver in the silver electrolysis waste liquid. The method can be applied to the recovery of various metals in the electrolytic waste liquid produced by the electrolysis process, and can also be applied to the extraction of some valuable metals in the discharged waste water. Background technique [0002] In the silver electrolysis process, the gold-silver alloy smelted from copper anode mud by fire method is used as the anode plate. During the silver electrolysis process, a large amount of silver is precipitated from the gold-silver anode plate, and cathode silver is generated at the electrolysis cathode. The remaining silver ions in the electrolyte are The discarded electrolyte is discharged to form silver electrolytic waste. Since the silver electrolysis waste liquid usually...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/62C25C1/20C25C7/06C02F103/16
Inventor 陈大林邢晓钟张燕李桃英陈云峰朱建斌
Owner JINCHUAN GROUP LIMITED
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