Abstract
This chapter discusses the major sources and types of scrap. It also discusses scrap recycling and physical beneficiation techniques for isolating copper from its coatings and other contaminants. Scrap is generated at all stages in the life span of a copper product. The primary producers that cannot be further processed or sell is home-scrap. The scrap generated during manufacturing is the new scrap and the useless category is an old scrap. The Institute of Scrap Recycling Industries (ISRI) currently recognizes 45 grades of copper-base scrap. The purest copper scrap is simply remelted and recast for manufacture and use. Less pure copper scrap is re-smelted and re-refined. Alloy scrap is usually recycled directly to make a new alloy. Considerable scrap must be physically treated to isolate its copper from its other components, as done in the recovery of copper from wire and cable by liberation and isolation. Old scrap is often discarded in landfills. Density, eddy current and electrostatic separation are the techniques that are used to recover copper from the shredded scrap.
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