| 摘要 |
<p>To provide a method of producing an ore slurry that has such a low-level yield stress as to allow the slurry to be transported even when it has a high concentration, so that no problems are raised in the transportation. The method relates to an ore slurry producing method that is used for recovering nickel and cobalt from nickel oxide ores by using a high temperature and pressure acid leach method utilizing sulfuric acid, and includes pulverizing and classifying steps as well as an ore slurry condensing step, wherein the slurry condensing step uses as a coagulant solution a diluted solution of the coagulant that satisfies the conditions of: (A) a coagulant molecular weight of 8 to 20 x 10 6 and (B) a coagulant dilution ratio of 0.1 to 0.5 g/L, and with respect to the added amount of the coagulant, a coagulant solution having an amount corresponding to 50 to 150 g of the coagulant amount per ton of dried solid components of the ore slurry is added to the ore slurry so as to be made in contact therewith for a sufficient period of time, with the temperature of the slurry being set in a range from 35 to 45°C upon transporting the slurry from the condensing step to the next process.</p> |
