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Dispersion of flotation concentrates before magnetic separation
Luleå University of Technology.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
1994 (English)In: Minerals Engineering, ISSN 0892-6875, E-ISSN 1872-9444, Vol. 7, no 12, p. 1505-1516Article in journal (Refereed) Published
Abstract [en]

Laboratory HGMS and WHIMS tests on flotation concentrates proved that grade and recovery in magnetic separation is greatly affected by the particle dispersion of the head feed. In this investigation, the recovery of a spodumene flotation concentrate, floated with a fatty acid collector, was improved by 10% when the pulp pH was reduced from pH 7 to pH 2 in order to improve the particle dispersion. For a phosphine floated Pb product, carrying sphalerite and chalcopyrite, grade and recovery was optimized in a window around pH 5. Recovery was improved by approximately 5%. The carry over capacity from the non-magnetic to the magnetic product for agglomerates containing a small amount of magnetic particles can be estimated using the HGMS capture probability function and the magnetic susceptibility of the material. An estimate of the spodumene / amphibolite system indicates that as little as 3% amphibolite in an agglomerate may be sufficient for the floc to be captured in the matrix. The corresponding number for the galena / sphalerite system is about 20%.

Place, publisher, year, edition, pages
1994. Vol. 7, no 12, p. 1505-1516
National Category
Metallurgy and Metallic Materials
Research subject
Mineral Processing
Identifiers
URN: urn:nbn:se:ltu:diva-7014DOI: 10.1016/0892-6875(94)90042-6Local ID: 55858aa0-ad47-11db-905c-000ea68e967bOAI: oai:DiVA.org:ltu-7014DiVA: diva2:979901
Note
Godkänd; 1994; 20070126 (pafi)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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