Method and System for Separation of Nickel and Cobalt from Nickel Laterites and Nickel Laterite Extraction Solutions

摘要

The invention relates to a method and an arrangement for separating nickel and cobalt by oxime extraction from an aluminium- and iron-fee leach solution obtained from acidic nickel laterite leach. The process is performed at a pH in the range of 4 to 5.5 and at a temperature of less than 100°C. The process may also comprise acid leaching of nickel laterite and removal of aluminium and iron as preceding steps. Furthermore, the process may comprise recovery of nickel and cobalt from the nickel and cobalt bearing solution obtained from the oxime extraction.