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3.把收集的(de)廢銅(tong)(tong)分類。沒有被污染的(de)廢銅(tong)(tong)或成分相同(tong)的(de)銅(tong)(tong)合金可以(yi)在爐中熔化后直(zhi)接使(shi)用;污染嚴重的(de)廢銅(tong)(tong)應進一步精煉以(yi)去除雜質(zhi);對于相互混合的(de)銅(tong)(tong)合金廢料,應進行(xing)熔化和(he)調整成分。通過這樣(yang)的(de)再生處(chu)理,銅(tong)(tong)的(de)物理化學性質(zhi)不(bu)被破壞,廢銅(tong)(tong)的(de)回(hui)收使(shi)其(qi)完全更新。
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