The effect of leaching time and ammonia concentration on the atmospheric leaching of copper

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dc.contributor.author Ntuli, Freeman
dc.contributor.author Muzenda, Edison
dc.contributor.author Ramatsa, Ishmael
dc.contributor.author Belaid, Mohamed
dc.contributor.author Kabuba, John
dc.date.accessioned 2012-11-13T15:56:46Z
dc.date.available 2012-11-13T15:56:46Z
dc.date.issued 2011
dc.identifier.citation Ntuli, F. et al. 2011. The effect of leaching time and ammonia concentration on the atmospheric leaching of copper. 2nd International Conference on Chemistry and Chemical Engineering, Chengdu, China, 29-31 July 2011. IPCBEE, 14:79-83. en_US
dc.identifier.issn 2010-4618
dc.identifier.uri http://hdl.handle.net/10210/8195
dc.description.abstract The effects of ammonia concentration and leaching time were investigated to determine the optimum leaching conditions. The experiments were conducted in a leaching cell submerged in a water bath, with ammonia concentrations of 1.5 M, 2.0 M, 2.5 M and 3.0 M and varying leaching time from 0 to 300 min. Ni-Cu matte containing 23% by mass Cu was used in this experimental study. Increase in the concentration of the lixiviant was found to increase recovery when leaching for 130 minutes, with a recovery of 32.86% Cu using 3 M solution of ammonia. An increase in the leaching time resulted in more copper being leached for all lixiviant concentrations. However, leaching with 2 M ammonia solution gave a higher yield of copper compared to higher concentrations. This anomaly could be a result of cementation; Cu is displaced by Ni as Ni is a more electronegative metal than Cu .It was found that at higher concentrations more nickel was extracted. en_US
dc.language.iso en en_US
dc.publisher International Association of Computer Science and Information Technology Press (IACSIT Press) en_US
dc.rights © IACSIT Press, Singapore. 2011. Available online at http://www.ipcbee.com/proceeding.htm. en_US
dc.subject Copper recovery en_US
dc.subject Leaching en_US
dc.subject Ammonia concentrations en_US
dc.title The effect of leaching time and ammonia concentration on the atmospheric leaching of copper en_US
dc.type Article en_US

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