从废干电池中回收锌锰及电镀再利用

Recovery of zinc and manganese from waste dry batteries and electrodeposition with the recovered solution

采用硫酸和亚硫酸的体积比为10：1的混合水溶液对废干电池进行浸酸处理，得到硫酸锌和硫酸锰的混合水溶液，并将该液作为主要原料配制电镀溶液进行锌锰合金电镀实验。镀液组成及工艺条件为23．4gm/L Zn^2＋，19．2g／L Mn^2＋，252．8g／L Na3C6H5O7·2H2O，1g/L聚乙二醇（6000），1．5g／L硫脲，50mgmNa2S2O3，pH4～5，温度20～30℃，阴极电流密度1～6A／dm^2。获得了含锰4.07％～15.8％的锌锰合金镀层，该镀层表面平整，结晶组织细致，结合力好。

A sulfate solution containing zinc and manganese was obtained by immersing waste dry batteries in the mixed solution consisting of vitriol and sulfurous acid with a volume ratio of 10：1, which was used as the main material for Zn-Mn alloy electrodeposition bath. The bath composition and electrodeposition conditions was as follows： 23.4 g/L Zn^2＋, 19.2 g/L Mn^2＋, 252.8 g/L Na3C6H5O7.2H2O, 1 g/L polyglycol（6000）, 1.5 g/L thiourea, 50 mg/L Na2S2O3, pH 4-5, temperature 20- 30 ℃, cathode current density 1-6 A/dm^2. The test results showed that a Zn-Mn alloy deposit with manganese content of 4.07%-15.8% was obtained, which has level surface, fine crystal texture and good adhesion.