METHOD FOR RECOVERING CHROMITE, AND METHOD FOR WET SMELTING OF NICKEL OXIDE ORE

摘要

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%.

主权项

1. 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 particle diameter separation step of separating the ore slurry which has a particle size of 2 mm or less based on a predetermined classification point depending on a particle diameter difference of particles contained in the ore slurry to be supplied; and a sedimentation separation step of sedimenting and concentrating oversized ore slurry separated in the particle diameter separation step to recover the chromite, wherein a content percentage of coarse particles in the oversized ore slurry separated in the particle diameter separation step is adjusted to 30 to 50%.