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Dephosphorization of magnetite fines: Part 2: Influence of chemical variables on flotation kinetics
Luleå tekniska universitet.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
1998 (English)In: Transactions of the Institution of Mining and Metallurgy Section C - Mineral Processing and Extractive Metallurgy, ISSN 0371-9553, E-ISSN 1743-2855, Vol. 107, p. C103-C110Article in journal (Refereed) Published
Abstract [en]

The influence of chemical and operational variables on the kinetics of apatite flotation from magnetite was investigated through batch flotation tests in a specially designed, temperature-controlled cell. The significance for the apatite flotation kinetics of four variables - collector, dispersant, pulp pH and temperature - and their interactions was examined through experiments conducted according to a full factorial design. The kinetic parameters of a first-order model with fast and slow floating distribution were utilized in judging the influence of reagent dosage on flotation performance. Statistical tests on phosphorus kinetic data show that collector and dispersant doses have a significant effect on phosphorus recovery. However, pulp temperature is the dominant factor for flotation rate. Increase in pulp temperature increases the flotation rate. The recovery of phosphorus increases with increasing collector dose at a given dispersant dose; however, the flotation rate decreases at doses of collector exceeding 65 g/t when the dispersant is at a higher level. The effect of dispersant dosage on flotation rate is observed to be nonlinear and quite complex owing to the interaction effects between collector and dispersant doses. The maximum recovery of phosphorus with minor loss of magnetite concentrate was obtained at pH 9, with either 30 or 65 g/t collector. The optimum flotation conditions were 65 g/t collector, 350 g/t dispersant, pH 8-9 and a pulp temperature of about 20 deg C

Place, publisher, year, edition, pages
1998. Vol. 107, p. C103-C110
National Category
Metallurgy and Metallic Materials
Research subject
Mineral Processing
Identifiers
URN: urn:nbn:se:ltu:diva-2989Local ID: 0bc950c0-9aaf-11dd-94de-000ea68e967bOAI: oai:DiVA.org:ltu-2989DiVA, id: diva2:975844
Note
Godkänd; 1998; 20081015 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Rao, K. HanumanthaForssberg, EricSamskog, Per-Olof

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Metallurgy and Metallic Materials

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