Treatment method of waste silver electrolyte

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

Active Publication Date: 2012-06-27
JINCHUAN GROUP LIMITED
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  • Summary
  • 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 use liquid caustic soda for neutralization and precipitation, and the neutralization slag is sent to fire for recovery, which increases the consumption of reagents and labor intensity

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0033] Swirl electrolysis of 450L silver electrolysis waste liquid with a silver ion concentration of 73.56g / L. First carry out impurity removal, and control the circulation flow rate of the silver electrolytic waste liquid to 3m during the impurity removal process 3 / h, the current density is 400 A / m 2 , remove impurities for 3 hours, and then carry out electrodeposition of electrolytic silver powder. 3 / h, the current density is 350 A / m 2 , electrolytic deposition for 35 hours, check the electrolytic solution, if the concentration of silver ions in the electrolytic solution is lower than 1g / L, stop the electrolytic deposition; after that, carry out deep purification of the electrolytic solution, and control the circulation flow rate of the electrolytic solution as 7m 3 / h, the current density is 400 A / m 2 , Purify for 6 hours, and complete the treatment of the silver electrolysis waste liquid. After testing, the silver ion content in the treated liquid is less than 0.00...

Embodiment 2

[0035] Swirl electrolysis 460L silver electrolysis waste liquid with silver ion concentration of 60.86g / L. First carry out impurity removal, and control the circulation flow rate of the silver electrolytic waste liquid to be 1m during the impurity removal process 3 / h, the current density is 200 A / m 2 , impurity removal for 5h; then carry out the electrodeposition of electrolytic silver powder, and control the circulation flow rate of the liquid after the impurity removal during the electrodeposition process to be 2m 3 / h, the current density is 200 A / m 2, Electrodeposition for 45 hours, check the electrolytic solution, if the concentration of silver ions in the electrolytic solution is lower than 1g / L, stop the electrolytic deposition; after that, carry out deep purification of the electrolytic solution, and control the circulation flow rate of the electrolytic solution as 5m 3 / h, the current density is 300 A / m 2 , Purified for 8 hours, and completed the treatment of the...

Embodiment 3

[0037] Swirl flow electrolysis 440L silver electrolysis waste liquid with silver ion concentration of 68.72g / L. First carry out impurity removal, and control the circulation flow rate of the silver electrolytic waste solution to 2m during the impurity removal process 3 / h, the current density is 300 A / m 2 , impurity removal for 4h; then carry out the electrodeposition of electrolytic silver powder, and control the circulation flow rate of the liquid after the impurity removal during the electrodeposition process to be 5m 3 / h, the current density is 500 A / m 2 , Electrodeposition for 30 hours, check the electrolytic solution, if the concentration of silver ions in the electrolytic solution is lower than 1g / L, stop the electrolytic deposition; after that, carry out deep purification of the electrolytic solution, and control the circulation flow rate of the electrolytic solution as 3m 3 / h, the current density is 200 A / m 2 , Purify for 10 hours, and complete the treatment of ...

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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 inGB / 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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Patent Type & Authority Patents(China)
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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