摘要 |
<p>An improved method for processing of nickel bearing saprolite and limonit e ores to recover the valuable minerals contained therein, comprising leachi ng the ore with nitric acid to form a slurry; separating the iron values by precipitation, removing the iron values; forming a liquid/solid residue in w hich nickel, cobalt and magnesium are in solution, and manganese and aluminu m are solid residues in oxide form; conducting a liquid-solid separation and removing the solids; and recovering the nickel, cobalt, and manganese from the liquid-metal concentrate. The leachate is recovered and nitric acid from the leachate is recycled.</p> |