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

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

doi:10.1080/08827508.2021.1875461

Cited by 12 publications

(6 citation statements)

References 34 publications

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“…This phenomenon demonstrates the EDA's strong ability, as a long-chain collector, for adsorbing onto air/water interface and mineral/water interface [1,42]. A similar pattern was reported by testing other cationic collectors, especially ether amine, which decreased the surface tension of the solution [43]. Outcomes indicated that the residual surface tension of quartz's suspension in various EDA concentrations (15,30,75, and 140 mg/dm 3 ) was lower than phlogopite and biotite, which means a lower EDA adsorption on the quartz surface.…”

Section: Residual Surface Tensionsupporting

confidence: 80%

Effect of Ether Mono Amine Collector on the Cationic Flotation of Micaceous Minerals—A Comparative Study

et al. 2021

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Micaceous minerals, known as layer silicates, are counted mostly as the gangue minerals associated with valuable minerals, especially iron oxides. They mainly reject through the reverse flotation process using the cationic collectors, e.g., ether amines, to improve process sustainability. Although ether amines have been applied for floating the wide range of silicates, few investigations explored their adsorption behaviors on the micaceous minerals. In this study, flotation of phlogopite, biotite, and quartz (for comparison purposes) in the presence of Flotigam®EDA (EDA) (commercial ether monoamine collector), at pH 10 was investigated through the single mineral micro–flotation experiments. Adsorption behaviors were explored by the contact angle, residual surface tension measurements, and zeta potential analyses. Micro–flotation outcomes indicated that the quartz floatability was more than phlogopite and biotite. In the presence of 30 mg/dm3 EDA, their recoveries were 97.1, 46.3, and 63.8%, respectively. Increasing EDA concentration made a substantial increase in micaceous minerals’ floatability. Adsorption assessments confirmed that increasing the EDA concentration resulted in higher adsorption of EDA onto the surface of micaceous minerals than the quartz (all by physical adsorption). Such a behavior could be related to the nature of micaceous minerals, including their layer structure and low hardness.

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Section: Residual Surface Tensionsupporting

confidence: 80%

Effect of Ether Mono Amine Collector on the Cationic Flotation of Micaceous Minerals—A Comparative Study

et al. 2021

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“…The recovery of fine hydrophilic particles in flotation is related to the recovery of water. Water may be carried by bubbles into the froth [42] and the water recovery is closely related to the nonselective transport of solid particles in the froth by entrainment [43].…”

Section: Initial Pilot Flotation Tests-summary Results For a 6-day Test Periodmentioning

confidence: 99%

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

et al. 2021

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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.

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“…In the flotation of coarse particles, ethermonoamines are said to be more selective in the pH range from 9.5 to 10.5, where the quartz surface is highly negative, with the greatest difference in surface charges between hematite and quartz (Numela & Iwasaki, 1986). These molecules are also reported to be more powerful collectors and more selective frothers than etherdiamines, generating more hydrodynamic motion and dragging more water to the foam (Matos et al, 2022;Matos et al, 2022a). This can be negative features for the flotation of fine particles; however, it can reduce particle-bubble detachment, which is regarded as the main reason for the decreased recovery of coarse quartz particles in cationic iron ore flotation (Vieira & Peres, 2015).…”

Section: Discussionmentioning

confidence: 99%

“…The fatty amines and etheramines are supplied, or prepared in the plant, as acetates or quaternary chloride salts partially neutralized with acetic or hydrochloric acid, respectively. Although fatty amines were used in iron ore flotation in the past, etheramines, which are more selective and more soluble in water, are the most used quartz collectors in the reverse cationic flotation of iron ores currently (Pearse, 2005;Matos et al, 2022a). Etherdiamines are considered more efficient in the recovery of quartz compared to primary monoamines or ethermonoamines, although presenting a higher cost.…”

Section: Introductionmentioning

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

Cited by 12 publications

References 34 publications

Effect of Ether Mono Amine Collector on the Cationic Flotation of Micaceous Minerals—A Comparative Study

Effect of Ether Mono Amine Collector on the Cationic Flotation of Micaceous Minerals—A Comparative Study

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

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

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