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Evaluation of the applicability of ultrasonic velocity profiling in conditions related to wet low intensity magnetic separation
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering.
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
2014 (English)Conference paper, Meeting abstract (Refereed)
Abstract [en]

The internal material transport and selection processes of the wet low-intensity magnetic separators (LIMS) are poorly understood; this calls for improved measurement techniques. In this work an ultrasonic velocity profiling (UVP) technique for measuring how material flow velocity varies with penetration depth is presented. A measurement depth of just a couple of centimetres would greatly improve the understanding of the separation process in a LIMS.When applied to flows of mineral suspensions with high volumetric solids concentration, similar to those in the separators, UVP is unique in combining:•Non-intrusive measurements.•Operates using just one sensor element (transducer).•Relatively good spatial resolution.•Penetrates opaque suspensions.•Fast sampling rate.Here, flows are studied in a rectangular duct (50 × 75 mm). Using magnetite suspensions, measurement through the whole depth of 50 mm is made with good accuracy. Velocity profiles are presented for solids concentrations of 5% and 9% solids by volume (20% and 36% by weight). Even at 9 vol% solids it is possible to reach a penetration depth of more than 25 mm.

Place, publisher, year, edition, pages
2014. Vol. 62, 2–8- p.
Research subject
Mineral Processing; Signal Processing
Identifiers
URN: urn:nbn:se:ltu:diva-34223DOI: 10.1016/j.mineng.2013.08.005Local ID: 85bc02d8-5f44-4464-8b11-7f440262931fOAI: oai:DiVA.org:ltu-34223DiVA: diva2:1007473
Conference
Physical Separation '13 : 20/06/2013 - 21/06/2013
Projects
Wet LlMS - Measurements and models
Note
Validerad; 2014; 20130821 (janste)Available from: 2016-09-30 Created: 2016-09-30Bibliographically approved

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Stener, JanCarlson, Johan E.Pålsson, BertilSand, Anders
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Minerals and Metallurgical EngineeringSignals and SystemsDepartment of Civil, Environmental and Natural Resources Engineering

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