Economic, water and energy evaluation of early rejection of gangue from copper ores using a dry sand fluidised bed separator
George V Franks, Elizaveta Forbes, Jun Oshitani, Robin J Batterham
International Journal of Mineral Processing | ELSEVIER | Published : 2015
The implications of adding a dry sand fluid bed (DSFB) separator for early rejection of gangue from copper ore on the economic outcomes as well as energy and water consumed have been analysed. The analysis included capital and operating costs and considered the consequence of loss of valuable copper to the tails. Two types of copper ores with different mass-density and copper-density distributions were analysed. Energy and water can be saved using the DSFB to reject gangue early but the loss of valuable copper makes the revised flow sheet uneconomical. If the low density ore rejected by the DSFB is sent to heap leaching, both reduced water and energy consumption as well as increased profit a..View full abstract
This study was partially supported by the Industrial Technology Research Grant Program in 2008 from the New Energy and Industrial Technology Development Organization (NEDO)of Japan. Thanks to the Australian Academy of Science and the Japan Society for the Promotion of Science for the Bilateral Exchange Fellowship for GVF to visit Okayama in September 2012. Thanks to Rowan Sonsie for helping with some of the spreadsheet calculation. Thanks to Malcolm Powell and Grant Ballantyne (JKMRC) for the helpful discussions.