Efficient Silver Recovery

Efficient Silver Recovery：

In today's digital age, traditional film usage has declined, yet the silver in waste film remains valuable. This article explores an efficient method to recover this silver using centrifugal electrodeposition equipment.

Principles of Centrifugal Electrodeposition

Centrifugal electrodeposition combines electrochemical reactions with centrifugal force to extract silver from solutions. The process involves several steps:

1. Silver Dissolution Silver halides in film are converted into soluble silver ions using nitric acid (HNO₃): AgBr+2HNO3→AgNO3+HBrAgBr+2HNO3​→AgNO3​+HBr AgCl+2HNO3→AgNO3+HClAgCl+2HNO3​→AgNO3​+HCl

2. Electrolytic Process The silver nitrate solution is placed in an electrolytic cell. An electric field causes silver ions to migrate to the cathode, where they are reduced to metallic silver: Ag++𝑒−→AgAg++e−→Ag

3. Centrifugal Electrodeposition The equipment rotates the electrolytic cell, creating a strong centrifugal force that accelerates the migration and reduction of silver ions, enhancing deposition speed and purity.

4. Silver Collection Metallic silver accumulates on the cathode and is then collected by scraping or other methods.

Advantages of Centrifugal Electrodeposition Equipment

1. Efficiency Centrifugal force significantly enhances electrochemical reactions, speeding up the silver recovery process.

2. High Recovery Rate The equipment can extract over 99% of silver from waste solutions.

3. Environmental Friendliness The closed system reduces chemical waste leakage and environmental contamination.

4. Cost-Effectiveness Low operating costs make this technology suitable for industrial-scale silver recovery.