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Article

Iron Ore Slimes Flotation Tests Using Column and Amidoamine Collector without Depressant

1
Department for Georessources, Université de Lorraine, CNRS, GeoRessources, F54000 Nancy, France
2
VALE S.A.—Iron Ore Beneficiation Development Team, Nova Lima 34006-200, Brazil
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Vale Institute of Technology, Ouro Preto 35400-000, Brazil
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Clariant, Belo Horizonte 31710-400, Brazil
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Department of Metallurgical and Materials Engineering, Engineering School, UFMG (Federal University of Minas Gerais), Belo Horizonte 31270-901, Brazil
*
Author to whom correspondence should be addressed.
Academic Editor: Przemyslaw B. Kowalczuk
Minerals 2021, 11(7), 699; https://doi.org/10.3390/min11070699
Received: 8 May 2021 / Revised: 16 June 2021 / Accepted: 21 June 2021 / Published: 29 June 2021
(This article belongs to the Special Issue Fine Particle Flotation: Experimental Study and Modelling)
This work describes the concentration of iron ore slimes on a pilot scale by using a 500-mm diameter flotation column and a novel collector, which renders the use of a depressant unnecessary. The pilot column was operated in series with the industrial plant Vargem Grande 2 (Iron Quadrangle, Brazil) receiving, as feed, part of the underflow from the desliming thickener. These pilot tests represented only the rougher stage of a flotation circuit. The novel collector used was an amidoamine (average collector dosage of 160 g/t), and the tests were carried out in the absence of starch, at pH 10.5 and with bubbles/microbubbles generated by cavitation tube. It was possible to achieve a concentrate, by reverse flotation, with an average iron content of 53% and an average metallurgical recovery of 91.5% The recovery of the silica in the froth was 53.1% in average for one stage of flotation. The high variability of the slime characteristics rendered difficult the stabilization of the SiO2 recovery; however, the applicability of the amidoamine collector was proven. In an industrial scale circuit, the use of online analyzers for Fe and SiO2 content and the adoption of control logics based on the adjustment of parameters such as reagents dosage and washing water flow rate adjustment should contribute to the optimization of the results obtained in the pilot scale tests. Further studies adding a cleaner concentration stage should be performed. View Full-Text
Keywords: iron ore; slimes; column flotation; amidoamine; pilot plant; Vargem Grande 2 iron ore; slimes; column flotation; amidoamine; pilot plant; Vargem Grande 2
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MDPI and ACS Style

Filippov, L.O.; Silva, K.; Piçarra, A.; Lima, N.; Santos, I.; Bicalho, L.; Filippova, I.V.; Peres, A.E.C. Iron Ore Slimes Flotation Tests Using Column and Amidoamine Collector without Depressant. Minerals 2021, 11, 699. https://doi.org/10.3390/min11070699

AMA Style

Filippov LO, Silva K, Piçarra A, Lima N, Santos I, Bicalho L, Filippova IV, Peres AEC. Iron Ore Slimes Flotation Tests Using Column and Amidoamine Collector without Depressant. Minerals. 2021; 11(7):699. https://doi.org/10.3390/min11070699

Chicago/Turabian Style

Filippov, Lev O., Klaydison Silva, Alexandre Piçarra, Neymayer Lima, Iranildes Santos, Leandro Bicalho, Inna V. Filippova, and Antonio E.C. Peres 2021. "Iron Ore Slimes Flotation Tests Using Column and Amidoamine Collector without Depressant" Minerals 11, no. 7: 699. https://doi.org/10.3390/min11070699

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