Silver wiping cloth recycling: A method and technology for extracting silver from waste silver wiping cloth recycling

With the development of industry and the widespread use of silver products in daily life, the recycling of waste industrial silver wiping cloth and the extraction of silver have become increasingly important. This article will introduce a method and technology for recovering silver, aiming to effectively recover waste industrial silver wiping cloth and extract high-purity silver.

1、 Pretreatment of recycled industrial silver wiping cloth

1. Classification and Collection: Classify waste industrial silver wiping cloths according to their usage and materials, such as different industrial scenarios and wiping items. The purpose of classification is to better control the impurity content in the recovery process and improve the purity of extracted silver.

2. Cleaning and impurity removal: Clean the sorted waste silver wiping cloth to remove surface dirt and impurities. The cleaning process can use mechanical or chemical methods to ensure the purity of the silver wiping cloth surface.

2、 Extraction Technology of Waste Industrial Silver Wiping Cloth

1. Crushing and grinding: Crush the cleaned waste silver wiping cloth to make it smaller particles. Next, use grinding equipment to finely grind the particles to increase their surface area, which is beneficial for the subsequent extraction process.

2. Chemical soaking: Soak the finely ground silver cloth particles in a chemical solution. Commonly used soaking solutions include hydrochloric acid, nitric acid, etc. These solutions can react with other metal impurities in the silver wiping cloth, dissolve them and convert them into soluble compounds.

3. Filtration and separation: After chemical immersion, the solution is filtered through filter paper or other filtering media to remove solid impurities from the solution. Subsequently, appropriate separation methods such as centrifugation are used to separate the solution and suspended solids.

4. Cathodic electrodeposition: Place the separated solution in a cathodic electrolysis tank as the electrolyte. Using a cathode made of silver and an anode made of stainless steel or other suitable materials, the silver ions in the solution are reduced to the cathode through an electric current, forming a pure silver layer.

5. Refining and purification: After cathodic electrodeposition, the pure silver layer obtained can be refined and purified by melting and other methods to improve its purity. This step can remove residual impurities and oxides to obtain high-purity silver.

Through the above methods and technologies, it is possible to effectively recover waste industrial silver wiping cloth and extract high-purity silver. This method not only recycles waste resources, reduces environmental pollution, but also provides a sustainable source of silver supply. In practical applications, process optimization and environmental protection measures need to be carried out according to specific circumstances to ensure the safety and sustainability of the recycling and refining process.

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