NICKEL RECOVERY METHOD AND RECOVERY DEVICE IN NICKEL PLATING PROCESS

摘要

PROBLEM TO BE SOLVED: To provide a nickel recovery method and a nickel recovery device in a nickel plating process by which nickel can be recovered from washing water after nickel plating with the accumulation of impurities reduced and at low energy, and the discharge of nickel to the environment can be suppressed.;SOLUTION: Alkali is added to washing water after nickel plating, and its pH is regulated to transform nickel ions in the washing water into nickel hydroxide or a mixture of nickel hydroxide and nickel carbonate. The produced nickel hydroxide or mixture of the nickel hydroxide and nickel carbonate is separated from the washing water. The separated nickel hydroxide or mixture of the nickel hydroxide and nickel carbonate is dissolved with a nickel plating liquid so as to be recovered.;COPYRIGHT: (C)2005,JPO&NCIPI