Studies on the Nickl Extraction (3rd Report)
Pressure leaching of the garnierite ore with sulfuric acid under oxygen atmosphere
1967 Volume 83 Issue 945 Pages 32-35
Details
1967 Volume 83 Issue 945 Pages 32-35
The extraction of nickel from the New Caledonian garnierite are with slufuric acid solution under pressurized oxygen atmosphere was studied:
(i) The oxygen increases the extraction of nickel in dilute acid leaching (less than 10% of sulfuric acid). It is about 5% higher than those in atmospheric air or nitrogen.
(ii) With increase of acid concentration, the effect of oxygen on nickel extraction decreases.
(iii) The oxygen also depresses the dissolution of iron into solution.
(iv) 60-86% of magnesia in the are was extracted into solution; it varies with the sulfuric acid concentration. The oxygen scarcely affects on the magnesia extraction.
