What are the tips for scrap metal recycling?

With the rapid development of society, at present, many things will be discarded after we use it for a period of time. Therefore, there are many resources that can be recycled. So what are the techniques for recycling scrap metal?

Recycling refers to the separation of practical materials from waste metals and the use of physical or mechanical processing into recycled products, which is an industrial chain from recycling, dismantling, to recycling.

Electrolytic silver new process scrap metal recycling, old metal recycling

The Institute of Materials Recycling has designed an electric de-silver device with a graphite plate as the cathode and a stainless steel roller as the anode. There are many small holes in the drum. Sodium citrate and sodium sulfite are electrolytes. The silver plated part enters from the leading end of the drum and is fed out from the end of the drum. The silver on the surface of the coating enters the electrolyte, and the substrate of the coating is intact and can be reused for electroplating. The recovery of silver was 97-98%, and the purity of silver powder was 99.9%.

Recycling waste silver and zinc batteries

The waste silver-zinc battery contains 52.55% silver and 42.7% zinc. Zinc is the negative electrode and silver oxide is the positive electrode. The Institute of Materials Recycling uses a dilute sulfuric acid immersion zinc immersion copper or silver powder direct melting ingot. The oxidizing agent is added with dilute sulfuric acid immersed copper, and the zinc solution is concentrated and crystallized to form zinc sulfate, and the copper sulfate is concentrated and crystallized to form copper sulfate. The zinc recovery rate is 98%, the silver recovery rate is 98%, and the silver purity is 99%.

Recovering silver from waste film

The silver emulsion layer on the color film is eluted with dilute sulfuric acid, the silver chloride is heated to precipitate the silver halide, the organic matter is washed with a chlorinated or organic solvent, and the pure silver is recovered as a suspension of the sugar solid in an alkaline medium. The purity of silver was 99.9% and the direct yield was 98%.