| 摘要 |
<p>The hydrometallurgical process for smelting to recover nickel and cobalt from a nickel laterite ore by a High Pressure Acid Leach including an ore treatment step, a leaching step, a solid-liquid separation step, a first neutralization step, a zinc removal step, a sulfurization step, and a final neutralization step, which process prevents wear of equipment, caused by an ore slurry, and also reduces amount of a final neutralization residue, as well as separates and recovers impurity components so as to contribute to resource recycling. It is characterized by having at least one step selected from the following steps (A) to (C). (A) separation and recovery, by a physical separation method, of particles including at least one kind selected from a silica mineral, chromite or a magnesium silicate ore in ore slurry produced from the above-described ore treatment step. (B) separation and recovery, by a physical separation method, of hematite particles in leach residue slurry produced from the above-described solid-liquid separation step. (C) step for subjecting a neutralization precipitate slurry produced from the above-described neutralization step to the final neutralization treatment separately from the leach residue produced from the above-described solid-liquid separation step. Figure 1 8. nickel laterite ore 1i. ore treatment step 2 1. step of (A) 9. ore slurry 2 2. chromite or the like 2. leaching step 1 o.leaching slurry ------------------------------------------------------ 3. solid-liquid separation step I leach 1 1. solution 1 2.leach residue slurry 4. neutralization step -mother 1 3. neutralization 1 4. liquor (1) precipitate 7.final slurry neutralization 5 zinc removal step (1) step 15. zinc sulfide 1 6.mother 23. step of (B) precipitate liquor ( 2) 2 5-f in-al 6sulfurizatio neutralization step step(2)(step (C) 1 8. barren hematite 1 7.mixed sulfide liquor 2 4. precipitate 2 6. final neutralization 1 9. final residue (2) neutralization residue(1) 2 0.tailing dam</p> |
