HYDROXIDE SOLIDS ENRICHMENT BY PRECIPITATE CONTACT

摘要

A process for the recovery of nickel and cobalt from an acidic sulphate feed liquor containing nickel and cobalt, said process including the steps of: (i) taking an acidic sulphate feed liquor and contacting that liquor with magnesium oxide to precipitate the nickel and cobalt as a mixed hydroxide precipitate; and (ii) contacting the mixed hydroxide precipitate with further acidic sulphate feed liquor to re-dissolve unreacted magnesium oxide in the mixed hydroxide precipitate, and precipitate additional nickel and cobalt as a mixed hydroxide precipitate.