Reagents in iron ores flotation

Araújo, Armando Corrêa de; Viana, Paulo R.M.; Peres, Antônio Eduardo Clark

doi:10.1016/j.mineng.2004.08.023

Cited by 277 publications

(115 citation statements)

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“…Currently, about 2×109 ton of ore are processed by flotation (Oliveira, 2007), including an important fraction of all iron ore consumed by the steel industry (Oliveira, 2007). The equipment commonly used in this industry are flotation columns and mechanical cells, which have been modernized to increased efficiency in the last decades (Araujo, et al, 2005;Oliveira, 2007;Valle, 2012;Lima, et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…The most used anionic collectors for oxidized minerals are Hexadecyl sulfate, petroleum sulfonates, Octyl hydroxamate, Oleyl sarcosine and N--alkyl sulfosuccinate. Fatty Amines, di--amines, ether amines and ether di--amines are the most common cationic collectors used (Araujo, et al, 2005;Oliveira, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…In flotation process for iron ore, the granulometric range used is 10--150 µm (Araujo, et al, 2005;Lima, et al, 2013). Quartz is the major gangue present in iron ore: and some routes available for its separation are: reverse cationic flotation of quartz; direct anionic flotation of iron oxides; and reverse anionic flotation of activated quartz (Araujo, et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…Quartz is the major gangue present in iron ore: and some routes available for its separation are: reverse cationic flotation of quartz; direct anionic flotation of iron oxides; and reverse anionic flotation of activated quartz (Araujo, et al, 2005). The reverse cationic is the most popular flotation route, and amine and cornstarch are the most common collector and depressant used, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…The reverse cationic is the most popular flotation route, and amine and cornstarch are the most common collector and depressant used, respectively. (Houot, 1983;Araujo, et al, 2005;Nascimento, 2010;Luo, et al, 2016;Lima, et al, 2016;Ma, et al, 2011). The direct anionic flotation of iron oxides is particularly interesting for the concentration of low grade ores, and fatty acids may be used as collectors (Araujo, et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Use of Linear Alkylbenzene Sulfonate (Las) and Polycarboxylate-Ether (Pce) as Reagents in Iron Ore Flotation

Carvalho

Vasconcelos

Moreira

et al. 2017

HOLOS

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Flotation is one of the separation techniques that has been used by the mineral industry and its importance has increased due to its better performance in the concentration of low grade ores. Specific chemical reagents are used in flotation in order to promote the hydrophobicity control of minerals dispersed in a pulp, among them, surfactants have been studied with good results. In this study, a substance based on Linear Alkylbenzene Solfonate (LAS), and a concrete admixture based on Policarboxilate--ether (PCE) were tested as reagents in iron ore flotation. The tests were performed in a friable hematite sample, using the microflotation technique. The Yates complete replicated factorial method for three variables and two levels was used in experimental planning. The variables evaluated was pH (9--11); LAS content (1000--5000 g/cm³); and PCE content (100--1000 g/cm³). The best result (84.1% floated) was obtained for combination pH=9, LAS content = 5000 g/cm³ and PCE content = 100 g/cm³

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Use of Linear Alkylbenzene Sulfonate (Las) and Polycarboxylate-Ether (Pce) as Reagents in Iron Ore Flotation

Carvalho

Vasconcelos

Moreira

et al. 2017

HOLOS

View full text Add to dashboard Cite

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Rupture of Wetting Films Formed by Bubbles at a Quartz Surface in Cationic Surfactant Solutions

Wiertel-Pochopien

Zawała

2019

Chem Eng & Technol

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Experimental studies were performed on the kinetics of the three-phase contact formation and bubble attachment to a quartz surface in solutions of a cationic surfactant of various concentrations. By tuning the distance between the singlebubble formation point and the quartz surface immersed in the solution, the influence of the state of the dynamic adsorption layer over a rising bubble on the mechanism of rupture of a wetting film formed was elucidated. Based on the unique methodology, allowing precise control over the initial degree of adsorption coverage at the detaching bubble, new evidence was found confirming the electrostatic character of the wetting film rupture in cationic surfactant solutions of low concentrations.

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Rehabilitation of a Riparian Site Contaminated by Tailings from the Fundão Dam, Brazil, Using Different Remediation Strategies

Gomes

Antão

Santos

et al. 2021

Enviro Toxic and Chemistry

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The tailings spilled by the Fundão Dam rupture in the Doce River basin (Brazil) had a high pH, elevated sodium (Na) and ether amine, and low soil organic matter. With the aim of decreasing the toxic compounds, we established 2 remediation strategies: treatment 1, phytoremediation with tolerant native species of the Atlantic Forest cultivated on scraped sediment plus the incorporation of organic matter; and treatment 2, phytoremediation with native species plus superficial deposition of organic matter. The experimental site was compared with a degraded site that the dam tailings had reached and with a preserved site, a fragment of preserved Atlantic Forest. After 12 mo, plants showed an outstanding growth, especially after treatment 1 (~4 m), and the remediation procedures resulted in significant decreases in pH (from 8.0 to~6.0), Na (from 154 to 22-35 mg/kg), electrical conductivity, and ether amine (from 6.0 to 0.5 mg/kg) in both treatments. By contrast, ammonium, a product of ether amine degradation, showed a significant increase in the experimental site, along with a significant increase in nitrate and improvement of soil microbial populations assessed by phospholipid fatty acid analysis. The treatments also improved soil fertility in the experimental site, as estimated by soil nutrients, cation exchange capacity, and soil aggregation. Based on the parameters analyzed, a principal component analysis showed that samples from the degraded site and the preserved site clustered in an opposite position and those from the experimental site clustered in an intermediate position but closer to the samples from the preserved site. Overall, our results demonstrated that the remediation procedures adopted were effective and resulted in rehabilitation of a riparian forest contaminated with dam tailings that included Na and ether amine.

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Reagents in iron ores flotation

Cited by 277 publications

References 3 publications

Use of Linear Alkylbenzene Sulfonate (Las) and Polycarboxylate-Ether (Pce) as Reagents in Iron Ore Flotation

Use of Linear Alkylbenzene Sulfonate (Las) and Polycarboxylate-Ether (Pce) as Reagents in Iron Ore Flotation

Rupture of Wetting Films Formed by Bubbles at a Quartz Surface in Cationic Surfactant Solutions

Rehabilitation of a Riparian Site Contaminated by Tailings from the Fundão Dam, Brazil, Using Different Remediation Strategies

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