HYDROMETALLURGICAL PLANT FOR NICKEL OXIDE ORE AND METHOD FOR OPERATING SAID HYDROMETALLURGICAL PLANT

摘要

The present invention makes it possible to increase ore throughput and improve productivity without causing a poor reaction and a decrease in operation efficiency. A hydrometallurgical plant 10 according to the present invention includes: a leaching facility 11 provided with leaching treatment tanks 11 (n) in a plurality of lines to perform a leaching treatment; a preliminary neutralization facility 12 provided with neutralization treatment tanks in two stages to perform pH adjustment of leach slurry; and a solid-liquid separation facility 13 made up of a single line to perform solid-liquid separation of leach slurry which is pH-adjusted and discharged from the preliminary neutralization facility 12, in which the preliminary neutralization facility 12 is provided with neutralization treatment tanks 12A (n) of a first stage in a plurality of lines so as to correspond to the respective leaching treatment tanks 11 (n) , and is configured such that leach slurries which are pH-adjusted in the neutralization treatment tanks 12A (n) of the first stage are merged in a neutralization treatment tank 12B of a second stage made up of a single line, and merged leach slurry is transported to the solid-liquid separation facility 13.