Study of scandium in HPAL technology in lateritic fields of the Moa region
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Abstract
In the strategic program of the Cuban nickel industry, the insertion of new products into the market is foreseen, which improve the cost-benefit relationship of its productions. In the project, the physical, chemical and mineralogical characterization of the samples taken in two deposits Moa Oriental and Zona Septentrional was carried out, with the purpose of evaluating the presence of scandium in the lateritic ores and debris, using acid leaching technology at pressure. Samples were taken in six directly drilled wells. Two analysis techniques were used, Atomic Absorption Spectrometry (EAA), and Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES), the latter to determine scandium and rare earths. Ni values of 0,83% to 1,28%, Co of 0,06 and 0,2%, SiO2 of 6,25% to 9,78%, MgO of 0,23% to 2,20% were obtained. It was possible to confirm the existence of scandium of 44,43 and 60 ppm respectively in the weathering crust of the two deposits and the studied waste dump and average Sc extractions of 64,71% and 80,53% respectively were achieved. This scandium and ETR contents increase the potential value of the resources in the studied areas.
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