A NOVEL APPROACH FOR THE TREATMENT OF EAF SLAG FROM LARCO FERRONICKEL PLANT IN GREECE FOR THE RECOVERY OF NICKEL AND COBALTStylianos Tampouris1; Martin Bertau2; Michael Kraft2; Clemens Rogoll2
1GMMSA LARCO, Marousi, Greece; 2Freiberg University of Mining and Technology, Freiberg, GermanyPAPER: 364/Mineral/Regular (Oral) OS
SCHEDULED: 18:10/Mon. 21 Oct. 2024/Lida
ABSTRACT:Laterites are valuable European sources to produce the critical battery metals cobalt, nickel, and manganese. In this study the wet-chemical leaching of pyrometallurgically treated laterites from the LARCO Ferronickel Plant in Greece was tested. It was shown that leaching with peroxydisulfate at 50°C allows to almost fully recover residual amounts of Co, Ni, and Mn from the rotary kiln dust and electric arc furnace (EAF) slag. The results of this study shows that EAF treatment followed by leaching the EAF slag is the most promising way. In sum, there were obtained ~ 65% overall yield of Co, ~95% overall yield Ni and ~100 % overall yield of Mn. In addition, up to 37% of chromium were mobilized and 98% of titanium, rendering this approach highly promising in terms of energy and resource efficiency and likewise overall process economy. As the successful development and application of this method in the field can increase the outcome of the plant by nearly ~50 million €/year.
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