A Geochemical Approach to Lixiviant Development for Manganese in situ Leach Mining

Petrie, Lloyd ; Bhappu, R. B. ; Canterford, J. H. ; Johnson, R. E. ; Marozas, Dianne ; Palmer, B. R. ; Paulson, Steven ; Redden, Lorin ; Topkaya, Y.
Organization: Society for Mining, Metallurgy & Exploration
Pages: 17
Publication Date: Jan 1, 1993
This paper describes a fundamental approach to in situ leach mining (ISLM) lixiviant development which emphasizes leaching selectivity through detailed characterization of mineral-solution interfacial chemistry and post-leach geochemistry. This experimentation and modeling approach consists of: (1) petrographic identification of reactive ore and gangue minerals; (2) determination of leaching kinetics of individual minerals through batch leaching tests; (3) evaluation of bulk solution geochemistry through column leaching tests; and (4) ISLM simulation of element species transport and geochemistry through core leaching tests. Recent results confirm good leaching selectivity for manganese, but reveal post- leach precipitation and permeability loss during core leaching experiments.
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