Study of the behavior of iron ore particles in spiral concentrators

Authors: Sadeghi, Maryam
Advisor: Bazin, Claude
Abstract: Spiral concentrators are gravity separation devices widely used in the iron ore industry. Suspended particles in the slurry, descending a spiral trough, are classified according to their size and specific gravity. Operating conditions and spiral geometry influence the classification. The effect of operating conditions, e.g. wash water flow rate, slurry solids concentration and feed rate, is studied on spirals performance. The tests are conducted using a pilot spiral (WW6E) at COREM and an iron ore from ArcelorMittal, Quebec. Results clearly demonstrate the dominant effect of the wash water addition with its major impact on coarse particles. A closed circuit of 3 parallel spirals with 3, 5 and 7 turns at COREM is used to assess spirals performance as a function of the number of turns. Initial results from twelve tests indicate that the 3-turn-spiral is well suited for cleaning, while the 7-turn-spiral is robust for roughing and scavenging duty.
Document Type: Mémoire de maîtrise
Issue Date: 2015
Open Access Date: 24 April 2018
Grantor: Université Laval
Collection:Thèses et mémoires

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