关键词：锡；镍；铝；不锈钢；稀土；阴极铜
摘 要：Copper scrap is also called scrap copper, based on its source it can be divided into new copper scrap and old copper scrap. New copper scrap refers to waste materials generated in the process of copper industrial production; old copper scrap refers to copper scrap recycled from discarded articles, such as copper wire recycled from old cables, household electrical appliance, electric motor, as well as copper water pipe used in buildings etc.