| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent wear of equipment, caused by an ore slurry, in a hydrometallurgical process for recovering nickel from a nickel oxide ore by a high pressure acid leaching process composed of an ore treatment step, a leaching step, a solid-liquid separation step, a neutralization step, a zinc removal step, a sulfurization step and a final neutralization step, and to provide a method for separating and recovering impurity components to reduce an amount of a final neutralization residue and contribute to resource recycling. <P>SOLUTION: The method includes at least one step selected from the following steps (A)-(C): (A) a step to separate and recover, by a physical separation method, particles composed of at least one kind selected from silica mineral, chromite or a magnesium silicate ore in ore slurry produced from the ore treatment; (B) a step to separate and recover, by a physical separation method, hematite particles in leaching residue slurry produced from the solid-liquid separation step; and (C) a step to subject a neutralization precipitate slurry produced from the neutralization step to the final neutralization treatment separately from the leaching residue produced from the solid-liquid separation step. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
