Initial investigation into the leaching of manganese from nodules at room temperature with the use of sulfuric acid and the addition of foundry slag—Part II

ABSTRACT The marine nodules are an attractive alternative source for the extraction of manganese due to the scarcity of high-grade metals on the surface. In the present investigation, working parameters (Fe2O3/MnO2 ratio and sulfuric acid concentration) were optimized for the dissolution of Mn from marine nodules using foundry slags. Finally, it is concluded that the optimum MnO2/Fe2O3 proportion is 1/2, while the optimum concentration of H2SO4 is 0.3 mol/L for a leaching time of 20 minutes achieving solutions of 70% Mn.

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