Can copper cable be recycled?

Copper cables are widely used in power transmission and electronic products. When copper cables reach the end of their service life, they do not lose their value as a metallic material. They can be systematically recycled. Copper cables are encased in an insulating sheath made of polyvinyl chloride (PVC), polyethylene or rubber. Internally, whilst the core consists primarily of high-purity copper conductors, it may also contain alloying elements such as tin, nickel and silver to enhance specific properties. Older cables may even contain lead. This composite structure determines the high-quality standards required for copper cable recycling, cable wire recycling machines serving as vital equipment for physical separation.



Physical separation primarily involves separating the copper from the various scrap metal sheaths and other metallic impurities. Traditional methods comprise three steps: mechanical stripping, crushing and sorting. The insulating sheath is cut open and stripped using a shear-type wire stripping machine. The cables are then fed into a cable wire recycling machine, where a crusher reduces the material into granular form. Subsequently, the differences in density and specific gravity between copper and plastic are utilised to carry out multiple sorting processes via airflow, gravity and electrostatic discharge. Many customers ask: why not proceed directly to smelting? If cables were smelted directly, the scrap metal impurities would produce harmful gases at high temperatures and reduce the purity of the copper, thereby affecting its subsequent processing properties. Pre-treatment is a fundamental requirement for the efficient recycling of copper cables.

Following physical separation, relatively pure copper granules are obtained. However, these may still contain an oxide layer or trace amounts of other metals. At this stage, the material proceeds to either pyrometallurgical or hydrometallurgical processing. Pyrometallurgy is typically carried out in medium- or high-frequency furnaces. The copper is melted at high temperatures, and a portion of the impurities is removed through slag-forming reactions. The material is then subjected to electrolytic refining to obtain high-purity cathode copper. Hydrometallurgy, on the other hand, is primarily suitable for oxidised copper or low-grade mixed copper. Copper ions are leached using acidic or ammoniacal solutions, after which the copper is recovered via displacement or electrowinning. The choice between these two methods depends on the purity and form of the raw material, as well as economic considerations.

The recycling of scrap copper cables is a rigorous industrial process. The core value of cable wire recycling machinery lies in its multi-stage separation and purification processes, which transform complex scrap copper cables into pure copper raw materials that meet industrial standards. This enables the efficient closed-loop utilisation of resources at the material level. In the future, the recycling sector will play a vital supporting role in resource sustainability.

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