Measurements of selectivity due to coalescence between two mineralized bubbles and characterization of MIBC action on froth flotation

Gourram-Badri, F.; Conil, Pierre; Morizot, G.

doi:10.1016/s0301-7516(97)00034-3

Cited by 33 publications

(12 citation statements)

References 4 publications

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“…The observation that particles with low hydrophobicity would be more likely to detach during bubble coalescence supports the findings of Gourram-Badri et al [22]. These researchers used a similar technique to that in the present work to investigate the selectivity between highly hydrophobic particles (copper concentrate) and hydrophobic minerals (zinc concentrate) of low hydrophobicity.…”

Section: Resultssupporting

confidence: 90%

“…The detachment due to insufficient surface area is expected to be effective in a relatively heavily loaded froth or at the top of the froth where the surfaces of the bubbles are fully covered and there is a competition between various species with regard to the available surface. In this competition, the particles that are weakly attached or relatively large are more likely to leave the froth [22][23][24]. Therefore, bubble coalescence is often beneficial in that it promotes the dislodgment of particles that are only weakly hydrophobic, relative to other particles in the system, thus promoting selectivity in the overall process [25].…”

Section: Introductionmentioning

confidence: 99%

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The detachment of particles from coalescing bubble pairs

Ata

2009

Journal of Colloid and Interface Science

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

The detachment of particles from coalescing bubble pairs

Ata

2009

Journal of Colloid and Interface Science

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“…Fundamental work reported in the literature [2] on bubble loading under controlled conditions, have shown relatively large bubbles (3-6 mm diameter) might be completely covered by particles. As well, other authors [3] have reported that in the froth zone of industrial cells, bubbles are almost fully loaded by particles. To this regard, the present authors [4] have shown that under certain conditions, the column flotation of a zinc concentrate (sphalerite, d 80 =105 µm), may give rise to fully-loaded bubbles which reach density values close to that of water, therefore risking the possibility of being dragged by the down-flowing slurry to the tailings discharge.…”

Section: Introductionsupporting

confidence: 66%

Dynamic and Geometrical Models to Estimate the Density of Fully-Loaded Bubbles in the Column Flotation of Silica Sand

Uribe‐Salas¹,

Pérez‐Garibay²,

Nava‐Alonso³

2008

TOMPJ

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This paper presents a comparison between the density of the bubble-particle aggregate pertinent to column flotation of mineral particles estimated with two models: one resulting from a balance of the forces acting on the aggregate that rises in a quiescent aqueous solution (termed dynamic or hydrodynamic model), and the other, of geometrical nature, which consists in accommodating the particles of known density, morphology and size distribution on the surface of an spherical bubble of known diameter. To compare the performance of the models, knowledge of terminal velocity (V t), diameter (d bp) and friction coefficient (C d) of the aggregate is required, as well as the size distribution of particles adhered to the bubbles, in order to determine the density of the aggregate (ρ bp). It is concluded that the geometrical model is able of approximating the estimations of the dynamic model, and may be therefore used to preliminary estimate the maximum density that a bubble-particle aggregate may reach.

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“…Flotasyon sonrası elde edilen ürünlerin kül analizi için de numuneler agat havan yardımıyla analiz boyutuna kadar öğütüldükten sonra seramik krozeler içerisinde fırında yakılmış ve kalan miktar külün hesaplanmasında kullanılmıştır. Flotasyon deneylerinin yanabilir verimlerini hesaplamak için ise aşağıdaki formül kullanılmıştır: Köpük stabilitesi "Dinamik Köpük Stabilitesi" (DKS) değeri ise aşağıdaki formül ile hesaplanmıştır (Johansson and Pugh 1992;Paulson and Pugh 1996;Gourram-Badri et al 1997;Barbian et al 2003):…”

Section: Flotasyon Deneyleriunclassified

Flotation Behavior of Bituminous and Lignite Coals in Salty Water

Özdemir¹,

Çinku²,

Uslu³

et al. 2013

AKU-J. Sci. Eng.

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ÖzetYüksek konsantrasyondaki inorganik iyonların solüsyon ve ara yüzeyleri etkilediği, kabarcıklar ile taneler arasındaki kolloidal etkileşimleri değiştirdiği dolayısıyla da minerallerin flotasyonunu etkilediği öteden beri bilinmektedir. Bu çalışmada NaCl, KCl, CaCl 2 , MgCl 2 tuzları içerisinde Türk linyit ve taşkömürlerinin hiçbir flotasyon kimyasalı (kollektör ve köpürtücü) kullanılmadan yüzebilirliği araştırılmıştır. Bunun yanı sıra zeta potansiyel ve köpük stabilite testleri de yapılmıştır. Flotasyon deneyleri, taşkömürünün hiçbir kimyasal kullanılmadan sadece tuzlu su ortamında yüzmesinin mümkün olduğunu gösterirken linyit kömürünün yüzmesinin mümkün olmadığını ortaya koymuştur. Kullanılan tuzlar arasında en iyi yüzdürme özelliği olan tuzun MgCl 2 , en düşük yüzdürme özelliği olanın da KCl olduğu ortaya çıkmıştır. 1 M tuz konsantrasyonunda yapılan köpük stabilite deney sonuçları da flotasyonla benzer eğilim sergilemiştir. Bu sonuçlar Na Flotation Behavior of Bituminous and Lignite Coals in Salty Water Key words Flotation;Coal; Salt; Zeta potential; Froth Stability; Ion-specific effect AbstractHigh salt concentrations have a significant effect on bulk and interfacial water structure, and colloidal interactions between bubbles and particles hence affect flotation of minerals. In this study, the floatability of Turkish coals in the presence of NaCl, KCl, CaCl 2 , MgCl 2 salts without the use of any flotation chemicals (collector and frother) was investigated in detail. In addition, zeta potential and foam stability tests were performed. The flotation experiments showed that it is possible to float the natural hydrophobic coal in salt solutions in the absence of collector and frother. On the other hand, the flotation of lignite coals is generally difficult. Additionally, MgCl 2 and KCl solutions showed the highest and the lowest flotation performance improvements, respectively. The froth stability tests at 1 M salt concentration indicated that there is a correlation between the flotation recovery and froth stability. These results also clearly indicated that Na

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Measurements of selectivity due to coalescence between two mineralized bubbles and characterization of MIBC action on froth flotation

Cited by 33 publications

References 4 publications

The detachment of particles from coalescing bubble pairs

The detachment of particles from coalescing bubble pairs

Dynamic and Geometrical Models to Estimate the Density of Fully-Loaded Bubbles in the Column Flotation of Silica Sand

Flotation Behavior of Bituminous and Lignite Coals in Salty Water

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