离子交换法净化电镀Cu－Sn废水

TREATMENT OF THE WASTELIQUOR OF Cu-Sn PLATING BATH BY ION EXCHANGE PROCESS

采用离子交换法净化电镀ｃｕ－Ｓｎ合金废水，将其中氰化物及铜离子分别以ＮａＣＮ和Ｎａ＿２Ｃｕ（ＣＮ）＿３形式回收，可作为镀槽补充液使用。净化出水水质达到国家排放标准，能用于镀件的漂洗，形成无污染排放的闭路系统。

The waste liquor of Cu-Sn plating bath is trealer by ion exchange process.Cyanogen chloride and copper ion of the waste liquor are recoveried as NaCN and Na_2Cu(CN)3.They can be used to electroplat again。Clean water can be used as plating solu-tion,Then it become a closed cyclic system without pollution discharged.