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AssigneeSumitomo Metal Mining Co., Ltd.
InventorsHiroyuki Mitsui, Osamu Nakai, Hirotaka Kawasaki, Hiroshi Kobayashi, Tatsuya Higaki, Atsushi Idegami
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A method for recovering chromite from ore slurry obtained by processing nickel oxide ore, the raw material, in a plant for the wet smelting of nickel oxide ore. In the method chromite is separated and recovered from an ore slurry obtained from a nickel oxide ore when nickel and cobalt are recovered from the nickel oxide ore. The method has a grain diameter separation step for separating the ore slurry on the basis of a predetermined classification point according to the difference in the grain diameter of particles contained in the supplied ore slurry and a sedimentation separation step for causing the oversized ore slurry separated in the grain diameter separation step to undergo sedimentation and concentration on the basis of a target classification point, and recovering the chromite. The coarse particle content of the oversized ore slurry separated in the grain diameter separation step is adjusted to 30-50%.
A chromite recovery method for separating and recovering chromite from ore slurry produced from nickel oxide ore when recovering nickel and cobalt from the nickel oxide ore, the method comprises:
A hydrometallurgical process for nickel oxide slurry for transporting ore slurry produced by slurrying nickel oxide ore to a high pressure acid leach facility where nickel and cobalt are leached to recover the nickel and cobalt from leachate produced by solid-liquid separation leached slurry, the process comprises:
Dependencies are inferred from the claim text.