Method for separating acid from high-acid high-nickel solution

The invention discloses a method for separating acid from a high-acid and high-nickel solution, which comprises the following steps of: S1, performing electrodeposition copper removal and impurity removal treatment on copper electrolysis waste liquid to obtain the high-acid and high-nickel solution containing more than 250g/l of acid and more than 10g/l of nickel; and S2, inputting the high-acid high-nickel liquid obtained in the step S1 and water into a countercurrent exchanger for equilibrium exchange, standing for 12-15 minutes for equilibrium exchange when the input total volume reaches 2 m < 3 > or 3 m < 3 >, and finally separating out acid. 本发明公开了一种从高酸高镍溶液中分离出酸的方法，该方法包括以下步骤：S1、将铜电解废液经电积脱铜、脱杂处理，得到含酸250g/l以上，含镍10g/l以上的高酸高镍溶液；S2、将步骤S1中得到的高酸高镍液和水，输入逆流交换器中进行平衡交换，每输入总体积达到2m3或3 m3时，静置12至15min进行平衡交换，最终分离出酸。