Bioleaching and Chemical Leaching of Lateritic Ore in Percolators
DOI:
https://doi.org/10.30544/MMD9Abstract
This work presents results of an initial exploration of nickel and cobalt bioleaching from lateritic ores in small percolators, which serve as simulations of the heap leaching process. Heap leaching offers an attractive alternative to high-pressure acid leaching of laterites, owing to its relatively simple technology, reduced capital and operational expenses, and lower carbon dioxide emissions. Conventional heap leaching of laterites relies on sulfuric acid leaching. Typically, this process consumes 400-500 kg/t of ore, necessitating the construction of a costly on-site sulfuric acid plant. However, the metabolic activity of sulfur-oxidizing bacteria can generate sulfuric acid while reducing ferric to ferrous iron, facilitating mineral dissolution through a combined protonation and reduction effect. Implementing this process eliminates the need for a sulfuric acid production plant, as the bacteria oxidize sulfur within the leaching heap. The results presented in this paper demonstrate comparable efficiencies between bioleaching and chemical leaching with sulfuric acid for nickel extraction, underscoring the importance of ferrous iron in enhancing leaching efficiency.
Keywords:
bioleaching, laterites, cobaltReferences
Kucera, Jiri, Eva Pakostova, Jan Lochman, Oldrich Janiczek, and Martin Mandl. "Are there multiple mechanisms of anaerobic sulfur oxidation with ferric iron in Acidithiobacillus ferrooxidans?." Research in microbiology 167, no. 5 (2016): 357-366.
Lovley, DR. "Rapid assay for microbially reducible ferric iron in aquatic sediments." Appl. Environ. Microbiol. 52 (1987): 751-757.
McDonald, R. G., and B. I. Whittington. "Atmospheric acid leaching of nickel laterites review: Part I. Sulphuric acid technologies." Hydrometallurgy 91, no. 1-4 (2008): 35-55.
Malik, Luise, and Sabrina Hedrich. "Ferric iron reduction in extreme acidophiles." Frontiers in Microbiology 12 (2022): 818414.
Marrero, J., O. Coto, S. Goldmann, T. Graupner, and A. Schippers. "Recovery of nickel and cobalt from laterite tailings by reductive dissolution under aerobic conditions using Acidithiobacillus species." Environmental science & technology 49, no. 11 (2015): 6674-6682.
Moro, Kofi, Frank Haubrich, Mirko Martin, Marlies Grimmer, Nils Hoth, and Axel Schippers. "Reductive leaching behaviour of manganese and cobalt phases in laterite and manganese ores." Hydrometallurgy (2023): 106101.
Norgate, T., and S. Jahanshahi. "Assessing the energy and greenhouse gas footprints of nickel laterite processing." Minerals Engineering 24, no. 7 (2011): 698-707.
Oxley, Anne, Mark E. Smith, and Omar Caceres. "Why heap leach nickel laterites?." Minerals Engineering 88 (2016): 53-60.
Santos, Ana Laura, Agnieszka Dybowska, Paul F. Schofield, Richard J. Herrington, and D. Barrie Johnson. "Sulfur-enhanced reductive bioprocessing of cobalt-bearing materials for base metals recovery." Hydrometallurgy 195 (2020): 105396.
Senanayake, G., J. Childs, B. D. Akerstrom, and D. Pugaev. "Reductive acid leaching of laterite and metal oxides-A review with new data for Fe (Ni, Co) OOH and a limonitic ore." Hydrometallurgy 110, no. 1-4 (2011): 13-32.
Stanković, Srđan, Srećko Stopić, Miroslav Sokić, Branislav Marković, and Bernd Friedrich. "Review of the past, present, and future of the hydrometallurgical production of nickel and cobalt from lateritic ores." Metallurgical & Materials Engineering 26, no. 2 (2020): 199-208.
Stanković, Srdjan, Mirko Martin, Simon Goldmann, Hans-Eike Gäbler, Kristian Ufer, Frank Haubrich, Vivian Fernandes Moutinho et al. "Effect of mineralogy on Co and Ni extraction from Brazilian limonitic laterites via bioleaching and chemical leaching." Minerals Engineering 184 (2022): 107604.
Wakeman, Kathryn, Hannele Auvinen, and D. Barrie Johnson. "Microbiological and geochemical dynamics in simulated‐heap leaching of a polymetallic sulfide ore." Biotechnology and bioengineering 101, no. 4 (2008): 739-750.
Wang, Rui, Jian-Qiang Lin, Xiang-Mei Liu, Xin Pang, Cheng-Jia Zhang, Chun-Long Yang, Xue-Yan Gao et al. "Sulfur oxidation in the acidophilic autotrophic Acidithiobacillus spp." Frontiers in microbiology 9 (2019): 3290.
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