Abstract
To provide basic information on the processes occurring during in situ leaching, the US Bureau of Mines developed a geologic characterization research program. This includes laboratory experiments using leaching apparatus that can accommodate whole core samples. Whole core experiments result in a higher proportion of ore mineral contact by the leach solution than packed column experiments. They also allow for the assessment of permeability changes taking place as the result of mineral dissolution, precipitation, and clay swelling within the flow channels of the rock. The leaching apparatus developed can be used for either constant-pressure or constant-flow rate experiments and allows for the control of flow rate, pressure, and temperature during the experiments. Details of the experimental apparatus are presented, as well as preliminary results from the first series of experiments on an oxide copper ore from the Casa Grande, AZ area.
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References
Lewis, W.E., and Tandanand, S., 1974, “Bureau of Mines Test Procedures for Rocks,” IC 8628, US Bureau of Mines, 223 pp.
Mallio, W.J., Park, W.C., Pojasek, W.J., and Rainvilie, G.D., 1981, “Parameters and Petrographic Interpretation of In Situ Copper Leaching,” Process Mineralogy, TMS-AIME, pp. 339–352.
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SME-MMP paper 87–617, SME-AIME Annual Meeting, Denver, CO, February 1987. Discussion of this paper must be submitted, in duplicate, prior to Jan. 31, 1988
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Paulson, S.E., Dahl, L.J. & Kuhlman, H.L. In situ mining geologic characterization studies: experimental design, apparatus, and preliminary results. Mining, Metallurgy & Exploration 4, 181–189 (1987). https://doi.org/10.1007/BF03402689
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DOI: https://doi.org/10.1007/BF03402689