Journal of Materials Research and Technology Journal of Materials Research and Technology
J Mater Res Technol 2018;7:218-22 DOI: 10.1016/j.jmrt.2017.05.014
Original Article
Clarification and solvent extraction studies of a high talc containing copper aqueous solution
Bienvenu Ilunga Mbuyaa, Méschac-Bill Kimeb,, , , César Muteba Kabeyaa, Arthur Tshamala Kanikic
a Université de Likasi, The Democratic Republic of the Congo
b University of Johannesburg, South Africa
c Université de Lubumbashi, The Democratic Republic of the Congo
Received 17 February 2017, Accepted 10 May 2017
Abstract

Effects of different flocculants on the clarification of a copper aqueous solution destined for solvent extraction were investigated. The test work was conducted on the pregnant leaching solution (PLS) of a high talc containing copper ore that had a high propensity of bearing a large amount of suspended solids. The clarification test work was conducted using three commercial high molecular anionic polyacrylamide polymer flocculants: rheomax® DR 1050, brontë 103, and senfloc® 2660. Solvent extraction tests were done using 30% (v/v) LIX 984N at pH 1.8. The parameters of clarification and solvent extraction were the flocculant dosage (0, 58.14, 116.28, 232.56 and 348.84g/t) and the ratio O/A (1/5, 1/2, 2/3, 1/1, 3/2, 2/1, and 5/1), respectively. The analysis results of the PLS showed it contained 2000ppm of solids in suspension. The optimal conditions for clarification and solvent extraction were a dosage of 116.28g/t and an O/A of 1.5, respectively. Under optimal conditions, the residual total suspended solids (TSS) in the clarified solutions were 1196ppm, 954ppm, and 928ppm; the phases disengagement time (PDT) for organic continuous dispersion were 70s, 80s and 60s; the percent TSS entrained in the organic phase were 26.76%, 28.93% and 25.32%; copper recoveries were 97.63%, 98.98% and 95.13%, with rheomax® DR 1050, brontë 103 and senfloc® 2660, respectively.

Keywords
Copper, Talc, Leaching, Pregnant leaching solution, Clarification, Flocculants, Solvent extraction
J Mater Res Technol 2018;7:218-22 DOI: 10.1016/j.jmrt.2017.05.014
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