| abstract |
Methods are provided for the direct recovery of non-ferrous metals (nickel, cobalt, copper, etc.) by ion exchange from raw materials such as ores, concentrates, semi-finished products and / or solutions. Nonferrous ore or concentrate is leached with mineral acid to dissolve the metal. The pH of the resulting leachate slurry is adjusted to 1.0-5.0 using some alkaline agent such as limestone, sodium hydroxide. Nonferrous metal is adsorbed from the leachate slurry using an ion exchange resin, and the ion exchange resin is selectively loaded with nonferrous metal, and the formula (1) [Chemical 1] (Where N: M: P: R ratio is in the range of 3-4: 64-70: 25-30: 2-2.5) It has the following structure. The loaded adsorbate is stripped with an acidic or ammonia-ammonium carbonate solution. The stripped resin is returned to the loading cycle. Non-ferrous metals can be recovered substantially pure from the effluent by any known method. The metal-depleted slurry proceeds to disposal and disposal. |