Results 161 to 170 of about 508 (188)
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Energy Balances in the Electrorefining and Electrowinning of Copper
JOM, 1981Using basic heat transfer correlations, the distribution of heat losses in a copper electrorefining tank house has been determined. The initial study led to programs to cover refining cells at both Kennecott refineries, with potential energy savings of approximately 1 MM Btu/ ton cathode.
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Microscopic examination of copper electrorefining slimes
Hydrometallurgy, 1990Abstract Anodic and floating slimes from the copper electrorefining process were investigated by a microscopic method, supplemented with X-ray diffraction and sedimentation analyses data. The specific gravities and granulometric compositions of the slimes were established. The shape, surface roughness, dimensions of the particles and their structure
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Current density optimization in the copper electrorefining process
Journal of Applied Electrochemistry, 1978The way of estimating the costs of the electrorefining of copper and of selecting the optimum electrolysis current density has been presented. The analysis has been carried out for the flow electrolyser taking into account the capital costs, electrical energy costs, heating or cooling costs and the electrolyte pumping costs. Against a background of the
T. Dabroś, M. Jaskuła
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Experimental Modeling of Nodulation in Copper Electrorefining
2018Concerning nodulation in copper electrorefining, it has been reported that short circuits caused by nodulation have the largest impact on the current efficiency. Therefore, to improve the current efficiency, it is important to prevent nodulation. In this research, the nodulation growth was investigated by replicating nodulation in the laboratory.
Yuya Nakai +4 more
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Exploratory development of air-agitation copper electrorefining
JOM, 1978Product quality and plate productivity are strongly affected by physical factors in ...
W. W. Harvey +2 more
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BEHAVIOUR OF ANTIMONY AND BISMUTH IN COPPER ELECTROREFINING CIRCUITS
Canadian Metallurgical Quarterly, 2008Antimony- and bismuth-rich copper anodes, anode slimes and decopperized anode slimes from industrial copper electrorefineries were studied mineralogically.
S. BEAUCHEMIN, T.T. CHEN, J.E. DUTRIZAC
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A study of anodic slime behaviour in the electrorefining of copper
Hydrometallurgy, 1995Abstract The kinetics of anode slime formation and propagation were studied in a laboratory-scale copper electrorefining apparatus. Laser-based illumination and digital image processing of videotaped records of slime movement, combined with current/time monitoring and polarization experiments, provide quantitative information about the complex ...
Z.H. Gu, J. Chen, T.Z. Fahidy
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Studies on the application of copper(I)-ammune sulphate electrolytes in copper electrorefining
Hydrometallurgy, 1982Abstract The electrolysis of a copper(I)-ammine sulphate electrolyte between copper electrodes has been investigated. A sealed cell and a solution containing 30 g/kg Cu, 95 g/kg NH3 and 95 g/kg SO4 were used. Current efficiencies (cathodic and anodic), at current densities over 100 A/m2, were higher than 95% and were practically independent of the ...
J. Sedzimir, B. Kustowska
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Hydrometallurgy, 1990
Abstract In the present work it is assumed that passivation of copper anodes is due, in sulphate solutions, to the precipitation of a copper sulphate layer on the surface. An equation describing dependence of the passivation time on the current density has been established under some simplifying assumptions.
J. Sȩdzimir, W. Gumowska
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Abstract In the present work it is assumed that passivation of copper anodes is due, in sulphate solutions, to the precipitation of a copper sulphate layer on the surface. An equation describing dependence of the passivation time on the current density has been established under some simplifying assumptions.
J. Sȩdzimir, W. Gumowska
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Reliability Evaluation of Sampling Electrorefined Copper Cathodes
1984The reliability of routine cathode sampling procedure at Nassau Recycle Corporation was evaluated. The evaluation was conducted on both in-house and supplier's cathodes. Sampled cathodes were charged into the shaft furnace to make continuous cast wire rod, and the analyses of the cathodes and the rod from the same batch were compared.
YT Hsu, FL Starbuck
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