THICKENER DEVICE USED IN PROCESS OF PRODUCING ORE SLURRY, AND METHOD OF CONTROLLING SOLID COMPONENT RATIO THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide ore slurry of an intended solid% without being influenced by the species and the blend ratio thereof, in a thickener device and a method of controlling a solid component ratio of an ore slurry, used in a process of producing a slurry of nickel oxide ore or the like to be sent to a high-temperature/pressurized sulfuric acid leaching process.SOLUTION: A first raw material ore slurry A0 in which plural species of ores are blended is subjected to thickening treatment in a first thickener 10A to obtain an ore slurry A1 of a first solid component ratio lower than an intended and prescribed solid component ratio. A second raw material ore slurry B0 in which plural species of ores are blended is subjected to thickening treatment in a second thickener 10B to obtain an ore slurry B1 of a second solid component ratio higher than the intended and prescribed solid component ratio. The blend ratio of the first and second ore slurries A1, B2 is controlled at a blend ratio that enables the production of an ore slurry C of the intended and prescribed solid component ratio, based on the solid component ratios thereof, and the ore slurries A1, B1 are blended.