Effects of Calcium and Chloride Ions in Iron Ore Reverse Cationic Flotation: Fundamental Studies

Lelis, Deisiane Ferreira; Cruz, Daniel Geraldo da; Lima, Rosa Malena Fernandes

doi:10.1080/08827508.2019.1666122

Cited by 18 publications

(5 citation statements)

References 37 publications

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“…The zeta potential measurement results of pure minerals as a function of pH indicated (Figures 5-7) that the point of zero charges (pzc) of pure biotite, phlogopite, and quartz occurred around pH 2. Similar results were reported in other investigations (Table 2) [10,13,24,37,[44][45][46][47][48][49][50]. EDA solution (30 mg/dm 3 ) exhibited a positive charge over a wide pH range (Figures 5-7) which is associated with its cationic active species, e.g., aminium ion, RNH3+, and dimerization of aminium ions: (RNH3)2+.…”

Section: Residual Surface Tensionsupporting

confidence: 89%

“…The application of Flotigam ® EDA (commercial ether monoamine) and its mechanism in the floatability of quartz have been reported in several studies [35][36][37]. Although few studies explored the effect of ether amines on the micaceous minerals' floatability (by conducting micro-flotation tests) [13,24], its effect and adsorption behavior on their surfaces, especially on their biotite and phlogopite surfaces, were not addressed in detail.…”

Section: Introductionmentioning

confidence: 99%

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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: 89%

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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“…3 ). Lelis et al (2019, and 2022) showed that the quartz surface energy was getting significantly lower than the hematite by increasing cationic collector concentrations 32 , 33 . These data illustrated the LBG-treated quartz was more hydrophobic.…”

Section: Resultsmentioning

confidence: 99%

“…The observed phenomena in the study, where the quartz mineral exhibited higher hydrophobicity than the LBG-treated hematite mineral, may be attributed to the DDA ions having a greater electrostatic attraction to the quartz surface than the LBG-treated hematite surface. This electrostatic attraction may have been further enhanced by forming hydrogen bonds between the DDA ions and the silanol groups on the quartz surface 32 , 35 – 37 . Surface wettability outcomes (Fig.…”

Section: Resultsmentioning

confidence: 99%

Green hematite depression for reverse selective flotation separation from quartz by locust bean gum

Kordloo

Khodadadmahmoudi

Ebrahimi

et al. 2023

Sci Rep

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Reverse cationic flotation is currently the main processing technique for upgrading fine hematite from silicates. Flotation is known as an efficient method of mineral enrichment that deals with possibly hazardous chemicals. Thus, using eco-friendly flotation reagents for such a process is an emerging need for sustainable development and green transition. As an innovative approach, this investigation explored the potential of locust bean gum (LBG) as a biodegradable depressant for the selective separation of fine hematite from quartz through reverse cationic flotation. Various flotation conditions (micro and batch flotation) were conducted, and the mechanisms of LBG adsorption have been examined by different analyses (contact angle measurement, surface adsorption, zeta potential measurements, and FT-IR analysis). The micro flotation outcome indicated that the LBG could selectively depress hematite particles with negligible effect on quartz floatability. Flotation of mixed minerals (hematite and quartz mixture in various ratios) indicated that LGB could enhance separation efficiency (hematite recovery > 88%). Outcomes of the surface wettability indicated that even in the presence of the collector (dodecylamine), LBG decreased the hematite work of adhesion and had a slight effect on quartz. The LBG adsorbed selectively by hydrogen bonding on the surface of hematite based on various surface analyses.

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“…As collector reagent the duodecyclamine (DDA) is used for the first stage. This reagent is well known for its very high absorption capacity on the surface of the ore thanks to the hydrogen bands formed from its polar groups [29][30][31]. The DDA reagent selectively makes the mica surface grains hydrophobic and thus confers a greater affinity for the gas phase than to the liquid phase.…”

Section: Mica Removalmentioning

confidence: 99%

Quartz Ore Beneficiation by Reverse Flotation for Silicon Production

Medjahed

Kheloufi

Bobocioiu

et al. 2020

Silicon

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In this work the reverse flotation as beneficiation process for high-purity silica valorization from Draissa quartz deposits (Algeria) is studied as a potential raw material for photovoltaic silicon production and also for starting charge for crystal growth material for a large wide of application such laser and scintillation. The samples are examined investigated by optical microscopy, secondary ion mass spectroscopy, X-ray fluorescence and Raman spectroscopy. The microscopic investigations detect solid impurities such as alkaline and plagioclase feldspars, micas and iron oxides. The analyzed silica shows well-developed crystals areas, delimited by microcrystalline regions. Impurities are predominantly located in low quartz granulometry (50-100μm). The XRF results highlight 93.63wt.% SiO 2 , 0.16wt.%, Fe 2 O 3 , 0.171wt.% Cl, 0.15wt.% CaO, 5.74wt.% Al 2 O 3 , 0.074 wt.% K 2 O, 0.001%wt CdO, 0.006%wt. SnO 2. However, these results remain insufficient for predestined use of this material raw quartz directly. A preliminary enrichment using reverse flotation process improves the silica purity up to 99.6% and removes the major impurities, which is suitable intermediate technological product able for silicon production and optical application domain.

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Effects of Calcium and Chloride Ions in Iron Ore Reverse Cationic Flotation: Fundamental Studies

Cited by 18 publications

References 37 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

Green hematite depression for reverse selective flotation separation from quartz by locust bean gum

Quartz Ore Beneficiation by Reverse Flotation for Silicon Production

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