Halogen free new recyclable cable with low toxic gas emission

Yoshino, A.; Sawada, Hideaki; Suzuki, Jun; Hasegawa, Masayuki; Murayama, Motohisa; Shinmoto, Takashi

doi:10.1109/ecodim.1999.747751

Cited by 3 publications

(1 citation statement)

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“…Burning the insulating material has been a frequently used method for the recovery of the metals from the cable waste. Such thermal recycling is no longer allowed in many countries owing to release of harmful gases, such as dioxin and hydrogen chloride, which result from PVC burning (Sijstermans 1997;Yoshino et al 1999). In addition, it is not economic to recover only the copper, without considering the insulating material.…”

Section: Introductionmentioning

confidence: 99%

Hot water separation process for copper and insulating material recovery from electric cable waste

Sheih¹,

Tsai²

2000

Waste Man Res

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Recycling in the electric cable industry, especially the complete separation of metal and insulating material for re‐use, has always been a problem. The present processes to recover copper and insulating material from cable waste involve the grinding of cables into smaller pieces to improve metal liberation from the insulating material. The method results in fine thread‐shaped metal wedges in the insulating material, which prevents the re‐use of the insulating material. A ‘hot water separation process’ was used to recover metal and insulating material from cable waste, with no need to grind the cable into smaller pieces to improve the liberation of copper from the insulating material. Based on the differences in coefficient of thermal expansion of the insulating material and copper, the cables are cut into a suitable length and placed into a blender with hot water. The insulating material and copper are separated and collected individually. By controlling the water temperature, blending speed and cutting length, complete separation can be achieved. This process is suitable for recycling many types of cable waste, including oil‐containing wires, which are usually more difficult to recover.

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Section: Introductionmentioning

confidence: 99%