Differences in Etheramines Froth Properties and the Effects on Iron Ore Flotation. Part II: Three-Phase Systems

Matos, Vanderson Eney de; Nogueira, Stephânia da Consolação Silva; Silva, Gilberto Tadeu Reis da; Kowalczuk, Przemyslaw B.; Peres, Antônio Eduardo Clark

doi:10.1080/08827508.2021.1888725

Cited by 10 publications

(2 citation statements)

References 38 publications

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“…Although collector speciation is driven by the pulp pH during conditioning and flotation, a previous neutralization is expected to interfere in this process due to the short conditioning time, leading to different amounts of molecular and ionic ethermonoamine available in the system. While the ionic species are expected to adsorb at the solid-liquid interface, working as collector, the molecular species preferably adsorbs at the liquid-air interface, having a frother role (Matos et al, 2022;Matos et al, 2022a;Matos et al, 2022b). Both species are also reported to adsorb at the solid-liquid interface as ionomolecular compounds, in a synergistic process which can reduce repulsion of cationic amine molecules and improve the stability of the hydrophobic layer (Pattanaik & Venugopal, 2018;Nunes et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

“…Etherdiamines are considered more efficient in the recovery of quartz compared to primary monoamines or ethermonoamines, although presenting a higher cost. This can be related to the collector's structural characteristics, with two polar groups, allowing adsorption onto more surface sites than ethermonoamines, as well as better froth properties (Matos et al, 2022;Matos et al, 2022a;Matos et al, 2022b). Substitutions to amines have been investigated mainly due to problems associated to the control of frothing properties and the high cost of the collector (Matos et al, 2022;Kapiamba & Kimpiab, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Study of new commercial collectors for the recovery of coarse quartz particles in iron ore flotation

Oliveira,

Rodrigues da Silva

2023

Physicochem. Probl. Miner. Process.

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Currently, a small range of commercial collectors is available for the use in reverse iron ore flotation at Vale. This input represents a considerable unit cost, being essential for the concentration of low content itabiritic iron ores. The present work evaluated the reverse cationic flotation of an itabiritic ore with low iron content (39.6 % Fe) from the Iron Quadrangle (BR) in bench scale tests, focusing on the use of new collectors to remove coarse quartz. The sample presents 19% of its particles as oversize in the 0.150 mm sieve. The poor flotation of coarse quartz particles (>0.150 mm) causes significant problems in various iron ore flotation circuits by contaminating the concentrate. The study evaluated the performance of 10 new collectors from the etheramine family with different degrees of neutralization and at different collector dosages. The flotation process variables were set as industrially practiced at the Cauê iron ore plant (BR). In tests varying the specific collector dosage, the non-neutralized etheramines showed improved performance compared to the current 50% neutralized etheramine used in the plant, achieving industrial targets: concentrate SiO2 content rate lower than 4.5% (1.4%), tailings iron content lower than 23% (18.94%), metallurgical recovery greater than 66% (74,8%), and Gaudin Selectivity Index greater than 6.6 (10.5). The 0.150 mm oversize in the concentrate, mostly coarse quartz particles, was reduced from 5.7% down to 1.2%, indicating the potential for the industrial application of non-neutralized etheramines in the recovery of coarse quartz.

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