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Invention Publication
CN1072218A 铜及铜合金制品表面上铅锡的回收 失效 - 权利终止

铜及铜合金制品表面上铅锡的回收
Abstract:
本发明涉及一种铜及铜合金制品表面上铅锡等的回收工艺方法。表面上涂有铅锡(或铅或锡)的废旧器件在熔盐中浸泡，熔化的铅锡合金(或铅或锡)铸成锭。溶盐的组成为含氯化钠20～80％，含氯化钾20～80％。熔盐的温度控制在690～850℃。经熔盐烫洗的废旧器件的部件用水冲洗，使铅锡合金(或铅或锡)与铜及铜合金很好地分离。本工艺方法的优点是连续操作，熔盐损失小，铅锡合金焊料可直接回收再作为焊料，铜及铜合金可直接配制成适宜牌号的合金。
Abstract(English):

Waste copper or copper alloy utensils coated with Pb-Sn alloy (or Pb, or Sn) are immersed in fused salt at 690-850 deg.C and fused Pb-Sn alloy (or Pb, or Sn) is cast into ingot. The said fused salt contains sodium chloride (20-80%) and potassium chloride (20-80%). The waste utensils treated by fused salt are flushed with water. In this way the Pb-Sn alloy (or Pb, or Sn) is well separated from Cu or Cu alloy. The invented process features less loss of fused salt, and direct recovery of Pb-Sn alloy.

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