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Thermodynamic calculations on iron-containing sulphide mineral flotation systems: I. The stability of iron-xanthates
Luleå tekniska universitet.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
Boliden Mineral AB.
1989 (English)In: International Journal of Mineral Processing, ISSN 0301-7516, E-ISSN 1879-3525, Vol. 27, no 1-2, p. 1-19Article in journal (Refereed) Published
Abstract [en]

Thermodynamic calculations have been carried out for the Fe-EX-H2O system to study the stability of iron-xanthates. It has been shown that the formation and stability of insoluble iron-xanthate compounds depend critically on the xanthate concentration, the pH, and the redox potential of the solutions. Ferric xanthate is stable in acidic solutions, which may cause and improve the flotation of iron-sulphides under the corresponding conditions. Insoluble hydroxyl ferric xanthates, FeOH (EX)2 (s) and Fe(OH)2EX(s), are obtained in the weakly acidic to alkaline pH range. The formation of liquid dixanthogen is favoured at high xanthate concentrations and redox potentials. It has been found that under conditions where insoluble ferric-xanthate compounds are stable, the quantity of aqueous dixanthogen is relatively small and no liquid dixanthogen can be obtained. The "intermediate pH depression" phenomenon is then observed during the flotation of pyrite with xanthates

Place, publisher, year, edition, pages
1989. Vol. 27, no 1-2, p. 1-19
National Category
Metallurgy and Metallic Materials
Research subject
Mineral Processing
Identifiers
URN: urn:nbn:se:ltu:diva-9923DOI: 10.1016/0301-7516(89)90002-1ISI: A1989AR68000001Scopus ID: 2-s2.0-0024732797Local ID: 8a121600-5743-11de-9f57-000ea68e967bOAI: oai:DiVA.org:ltu-9923DiVA, id: diva2:982862
Note
Godkänd; 1989; 20090612 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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