Analysis of Reagent Regimes in Nepheline Concentrate Production from Loparite Ore Processing Tailings by Flotation
E. V. Chernousenko1, I. N. Vishnyakova1, G. V. Mitrofanova1, V. V. Marchevskaya1, A. A. Kompanchenko2
1Mining Institute, Kola Science Center, Russian Academy of Sciences, Apatity, Russia
2Geological Institute, Kola Science Center, Russian Academy of Sciences, Apatity, Russia
Keywords: Tailings, tailings storage, loparite ore of the Kola Peninsula, nepheline, mafic minerals, feldspar, flotation, magnetic separation
Abstract
The authors analyzed some reagent regimes in flotation of nepheline from loparite ore tailings: mixture of tall oils, hydroxamic acids in combination with distilled tall oil; mix of tall oils with addition of polyalkyl benzene sulfonic acids or amine-containing collectors. The nepheline concentrate produced in the optimized reagent regime contained Al2O3 27.18-27.57%. With addition of tall oil polyalkyl benzene sulfonic acid, activity of the collecting mixture reduced, and the produced concentrate quality lowered to Al2O3 26.33%. Two methods to bring flotation concentrates to a standard quality are discussed. The use of magnetic separation allowed production of nepheline concentrate with Al2O3 28.0-28.3% at the recovery of 72-76% compared to the initial product. Direct cationic flotation with agent Flotigam-2835 in an acidic medium with рН 4.5, created by sodium silicofluoride, produced nepheline concentrate with Al2O3 29.63% at the recovery of 65.9% compared to the initial product.
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