RECYCLE PROCESS OF HIGH PURITY NICKEL FROM WASTE NICKEL SLUDGE USING ION EXCHANGE RESIN AND REDUCING AGENT

摘要

PURPOSE: A method for recovery nickel powder of high purity from nickel waste by using an ion exchange resin and a reducing agent is provided to obtain nickel powder of high purity with a simplified method without using an expensive electrolysis device or a heat treatment process. CONSTITUTION: A method for recovery nickel powder of high purity from nickel waste by using an ion exchange resin and a reducing agent includes the following steps of: removing primary impurities from nickel sulphate and waste nickel sulphate which are obtained from nickel sludge; removing secondary impurities by filtering the nickel sulphate with the ion exchange resin; forming a precursor by adding hydrazine as a reducing to the nickel sulphate; and increasing the pH of the precursor at a range of 10-12 and obtaining nickel powder by inducing a reduction reaction by separating liquid and solid from each other. [Reference numerals] (S01) Dissolve nickel sludge and prepare waste nickel sulphate; (S02) Remove impurities-control pH; (S03) Remove impurities-ion exchange resin; (S04) Add a reducing agent-generate a precursor; (S05) Reduction reaction-a pH control agent; (S06) Obtain nickel powder; (S07) Wash; (S08) Dry