Comprehensive physical chemical characterization of lateritic ores that contribute to the HPAL process of the Company MOA NICKEL SA
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Abstract
In this work, we present results from the physical and chemical characterization of samples from the principal orebodies from the Pedro Sotto Alba Moa Nickel S.A. mining operation. It was found that the orebody with the largest content of material > 20 mesh was Zona A A5, containing 39.95% material above 20 mesh. With relation to the fraction – 20/+100 mesh, the areas with the largest participation were Zona Septentrional with 27.4%, Camarioca Norte A19 with 14.26%, and Atlantic with 12.26%, which were all above the technical requirements of the processing plant (12%). In agreement with past chemical analysis, the orebody Zona Septentrional is the deposit with the greatest content of Ni in the -20/+100 size fraction, showing a Ni grade of 1.492%. The rest of the areas studied present very low contents of Ni in this fraction. It was observed that the relationship between chemical composition and the settling rate is consistent with past observations, with a direct relationship with Fe content and an inverse relationship with Mg content.
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