Tibet Mag stated that the main advantages of the nickel-cobalt ore hydrometallurgical activated magnesia process are low acid consumption, high nickel-cobalt leaching rate, low neutralizer consumption and high purity of the leachate. The process flow is shown in the figure.
The specific process is as follows: the limonite-type laterite-nickel ore is leached with sulfuric acid under pressure, and the obtained flash slurry is directly neutralized and leached with the high-magnesium-containing humus-type laterite-nickel ore, and the residual heat of the flash-evaporated ore slurry is used for direct reaction. At the same time, in the presence of K+, Na+, and NH4+, by adding seed crystals, more than 80% of the iron in the solution forms jarosite precipitation, and then additional limestone slurry is added to promote the formation of more jarosite. During the neutralization and leaching process...
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