Online Monitoring of Copper Leaching Process Heterogeneity Using Electrical Capacitance Volume Tomography

Abstract:

In this study, we have performed the monitoring of copper leaching process using electrical capacitance volume tomography (ECVT). The ECVT has been used to measure electrical signals generated from the copper leaching process and reconstruct volumetric image of the signals in real time. This method is based on the fact that permittivity changes with the changes of ions concentration caused by leaching reaction. From the 3D image, we were able to analyze the heterogeneity of leaching reaction. There are two important features of leaching measurement, the online capability of the method and the ability to describe the leaching process heterogeneity. The current methods of leaching process usually have only one of the two important features. ECVT with high speed capability can provide both features. The experiment was carried out for 3 hours at room temperature without stirring, in which, copper foil and 2M H₂SO₄ were used as leaching object and leaching agent. The ECVT reconstructed image shows the heterogeneity permittivity distributions which shows the heterogeneous nature of leaching process.

• Periodical: Advanced Materials Research (Volume 896)
• Pages: 714-717
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.896.714
• Online since: February 2014
• Authors: Didied Haryono, Harisma Nugraha*, Warsito Purwo Taruno, Marlin Ramadhan Baidillah, Rommy Iman Sulaiman, Mahfudz Al Huda
• Keywords: Copper Leaching Process, ECVT, Heterogeneity, Hidrometallurgy, Online Monitoring

References

[1] Dhawan, N, et al., Recent advances in the application of X-ray computed tomography in the analysis of heap leaching systems, Minerals Engineering 35 (2012) 75-86.

DOI: 10.1016/j.mineng.2012.03.033

[2] Lu, Z. Y, Jeffrey, M. I and Lawson, F, The effect of chloride ions on the dissolution of chalcopyrite in acidic solutions, Hydrometallurgy 56 (2000) 189-202.

DOI: 10.1016/s0304-386x(00)00075-x

[3] Ghorbani, Y, Petersen, J, et al., Investigation and modelling of the progression of zinc leaching from large sphalerite ore particles, Hydrometallurgy 131-132 (2013) 8-23.

DOI: 10.1016/j.hydromet.2012.10.004

[4] M. A. Fagan, Sederman, A. J, Harrison, S. T and Johns, M. L, Phase distribution identification in the column leaching of low grade ores using MRI, Minerals Engineering (2012).

DOI: 10.1016/j.mineng.2012.10.005

[5] William, R. A and Beck, M. S, Process Tomography : Principles, Techniques and Applications, Butterworth-Heinemann Ltd, London, (1995).

[6] W. Warsito, Q. Marashdeh, and L.S. Fan, Electrical Capacitance Volume Tomography. " IEEE Sensors Journal. vol. 7. No. 4. (2007) Pp 525-532.

DOI: 10.1109/jsen.2007.891952

[7] Tapp, H. S, Peyton, A. J, Kemsley, E. K and Wilson, R. H, Chemical engineering applications of electrical process tomography, sensors and actuators B 92 (2003) 17-24.

DOI: 10.1016/s0925-4005(03)00126-6

[8] Baidillah, M. R, Warsito, W and Mukhlisin, M., Design optimization of 3D sensor designs for electrical capacitance volume tomography (ECVT). Jurnal Matematika & Sains 16(3) (2011) 123-128.