Resumen

TAUTE, J.J.  y  ARCHER, S.J.. Techno-economic evaluation of BASF's new high-temperature solvent extraction reagent. J. S. Afr. Inst. Min. Metall. [online]. 2018, vol.118, n.11, pp.1185-1193. ISSN 2411-9717.  https://doi.org/10.17159/2411-9717/2018//v118n11a9.

BASF Mining Solutions has developed a new-generation copper solvent extraction reagent that offers significant benefits over standard extractants currently available to the industry. As the name suggests, the new high-temperature (HT) extractant can be used at a higher operating temperature, but also exhibits significantly lower degradation rates, greater copper-to-iron selectivity, and is totally nitration-proof compared with the standard extractants. Pilot-plant trials have also shown that lower aqueous-inorganic entrainment can be achieved. This paper investigates the techno-economic benefit of using the HT extractant as an alternative to the standard extractant in a high-temperature application. The results of the technical evaluation showed that the use of the HT extractant reduces the extractant addition requirements and bleed volume from copper electrowinning; this smaller bleed requirement further reduces acid and limestone consumption, leading to a reduction in valuable metal losses. The results of the economic evaluation showed that the use of the HT extractant represents significant cost savings over that of the standard extractant.

Palabras clave : copper solvent extraction; reagents; high temperature; selectivity; entrainment.

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