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Modeling validation of caliche ore leaching using seawater
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Chemical Engineering.ORCID iD: 0000-0001-8241-2225
2014 (English)In: International Journal of Mineral Processing, ISSN 0301-7516, Vol. 126, 10-17 p.Article in journal (Refereed) Published
Abstract [en]

Leaching column experiments of caliche were performed using seawater as the leaching agent because the caliche deposits are located in Northern Chile where water resources are scarce. The use of seawater without desalination is an attractive alternative for mining operations. The experimental recoveries of different ions were modeled using a hybrid model, which uses empirical information and fundamental principles. The following ions were considered: nitrate, iodine, sulfate, chloride, sodium, potassium and magnesium. The model explicitly considers different column heights, irrigation rates, and leaching agents. A sensitivity analysis showed that parameters associated with the particle level predominantly determined the calculated recoveries. The predictive capability was also tested, and the results were generally good, except for the sulfate ion, the dissolution of which was controlled by the presence of other ions.

Place, publisher, year, edition, pages
2014. Vol. 126, 10-17 p.
Keyword [en]
Caliche, Hybrid modeling, Column leaching experiments, Seawater, Model validation
National Category
Mineral and Mine Engineering
URN: urn:nbn:se:kth:diva-143458DOI: 10.1016/j.minpro.2013.11.003ISI: 000331506300002ScopusID: 2-s2.0-84890014929OAI: diva2:707651

QC 20140325

Available from: 2014-03-25 Created: 2014-03-21 Last updated: 2014-03-25Bibliographically approved

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Moreno, Luis
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