Evaluation of the applicability of ultrasonic velocity profiling in conditions related to wet low intensity magnetic separation
2014 (English)Conference paper, Meeting abstract (Refereed)
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
IdentifiersURN: 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
Physical Separation '13 : 20/06/2013 - 21/06/2013
ProjectsWet LlMS - Measurements and models
Validerad; 2014; 20130821 (janste)2016-09-302016-09-30Bibliographically approved