Effect of particles size range on iron ore flotation

Lima, Neymayer Pereira; Valadão, George Eduardo Sales; Peres, Antônio Eduardo Clark

doi:10.1590/s0370-44672013000200018

Cited by 6 publications

(6 citation statements)

References 5 publications

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“…Frother dosages of runs C60-F50 and C60-F100 showed promising results as iron recoveries lies in the same range as C100 run, that is when higher collector dosage was used without a frother. Though, we expected to obtain higher quartz recoveries for smaller particle due to the higher specific area of this particle class [ 34 ], the mineralogy of the ore used (see below) in this study may be responsible of the opposite results. Furthermore, the variety in particle size distribution of our grinded ore would lead to more efficient separation.…”

Section: Resultsmentioning

confidence: 98%

The effects of partially replacing amine collectors by a commercial frother in a reverse cationic hematite flotation

Kapiamba

Kimpiab

2021

Heliyon

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Iron ore froth flotation has recently been used to obtain pure minerals due to the depletion of high-grade deposits. Amine collectors have often been used in cationic reverse iron ore flotation to achieve the separation with quartz impurities. The main problem associated with these collectors is related to the control of frothing properties and the high cost of amine reagents. In this paper, we report the benefits of partial replacement of amine collectors with a frother in reverse cationic flotation of hematite. Surface tension and batch flotation experimental results indicated for the first time that replacing Flotigam EDA, an etheramine collector by more than 10% improved the flotation performance in both grade and recovery of hematite. It was also noted mild hematite entrainments for lower frother dosages whilst reagents cost estimation indicated profitability per ton of iron recovered. At higher frother dosage however, higher quartz recoveries were observed as a result of entrainment which led to satisfactory results in terms of iron grade in the sink, but results showed higher costs of reagents than when collector was used alone. From observed results, it was concluded that partially replacing amine collector by a frother does improve the performance of the flotation globally regardless of pronounced entrainment that was mainly due the mineralogy of the ore with notable amounts of locked particles in the lower sizes. Finally, it would be useful to investigate these findings with alternative reagents and on minerals with different mineralogical properties.

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Section: Resultsmentioning

confidence: 98%

The effects of partially replacing amine collectors by a commercial frother in a reverse cationic hematite flotation

Kapiamba

Kimpiab

2021

Heliyon

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“…Particle size distribution is one of the key parameters in the separation of minerals using flotation process . The flotation processes of iron ore, either in mechanical cells or in columns, are fed with particles with sizes between 10 and 150 μm, while froth flotation is generally limited to size fractions between 65 and 100 mesh, particles larger than 65 mesh Tyler (210 μ) are difficult for the air bubble to lift and particles smaller than 400 mesh (37 μ) are often not attached to the air bubble . Feeding the plant with wide range of particle sizes can affect the selectivity of the process, given the possible differences in hydrophobicity, specific surface area, weight, etc .…”

Section: Physico‐chemical Process (Flotation)mentioning

confidence: 99%

Desulfurization of Iron Ores: Processes and Challenges

Rezvanipour

Mostafavi

Ahmadi

et al. 2018

steel research int.

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Various studies have been increasingly performed on the reduction of sulfur content of iron ores and concentrates. The presence of sulfur in these materials causes technical problems in steel and alloys and environmental issues in the sintering of iron ore process. The achievement of higher sulfur removal rates has been an important goal since the development of sulfur removal techniques. In this research, an effort is made to separately introduce the various processes, industrial practices, and fundamental research activities to remove sulfur from iron ores, concentrates, or roasted iron ores. In this way, the optimized condition and latest innovations in sulfur removal using flotation are reviewed and the development of leaching and bioleaching techniques for sulfur reduction is introduced; following the development of thermal decomposition, physical separation methods, and magnetic separation technique are discussed. In each section, a brief introduction of fundamentals for the sulfur removal techniques and their potential advantages for sulfur removal are described and challenges for each technique are presented. Finally, the techniques are compared from technical, economic and environmental viewpoints, and future trends in desulfurization of iron ores are presented.

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“…This process is largely employed throughout the world and is applicable to minerals such as sulfides, oxides, phosphates, silicates, etc. (Lima, et al, 2013). The flotation process presents as advantages: favorable performance for low content oxidized ores; possibility of reduction of silica contents in concentrates obtained by magnetic separation; and possibility to produce concentrates for the direct reduction of metallurgical processes (Iwasaki, 1999).…”

Section: Introductionmentioning

confidence: 99%

“…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%

“…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%

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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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Effect of particles size range on iron ore flotation

Cited by 6 publications

References 5 publications

The effects of partially replacing amine collectors by a commercial frother in a reverse cationic hematite flotation

The effects of partially replacing amine collectors by a commercial frother in a reverse cationic hematite flotation

Desulfurization of Iron Ores: Processes and Challenges

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

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