Dynamic froth stability in froth flotation

Barbian, N.; Ventura-Medina, Esther; Cilliers, J.J.

doi:10.1016/j.mineng.2003.06.010

Cited by 95 publications

(33 citation statements)

References 12 publications

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“…They are concentration at half of the maximum foam height (CMH) [52] determined from the foam height-concentration curve; foam time of life [17]; concentration at minimum bubble velocity (CMV) [43,53] based on the bubble velocity-concentration curve, dynamic stability factor (DSF) [54], Bikerman's foaminess unit Σ(reference) and Sun's frothability index [50]. …”

Section: Other Parameters Used For Frother Classificationmentioning

confidence: 99%

Classification of Flotation Frothers

Drzymala

Kowalczuk

2018

Minerals

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Abstract:In this paper, a scheme of flotation frothers classification is presented. The scheme first indicates the physical system in which a frother is present and four of them i.e., pure state, aqueous solution, aqueous solution/gas system and aqueous solution/gas/solid system are distinguished. As a result, there are numerous classifications of flotation frothers. The classifications can be organized into a scheme described in detail in this paper. The frother can be present in one of four physical systems, that is pure state, aqueous solution, aqueous solution/gas and aqueous solution/gas/solid system. It results from the paper that a meaningful classification of frothers relies on choosing the physical system and next feature, trend, parameter or parameters according to which the classification is performed. The proposed classification can play a useful role in characterizing and evaluation of flotation frothers.

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Section: Other Parameters Used For Frother Classificationmentioning

confidence: 99%

Classification of Flotation Frothers

Drzymala

Kowalczuk

2018

Minerals

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“…In what follows, we measured the dynamic froth stability as it also plays an important role in flotation (Neethling and Cilliers, 2003;Barbian et al, 2003Barbian et al, , 2005. Figure 10 shows that at a given concentration, MCHM gave more stable froth than MIBC regardless of water quality.…”

Section: Froth Stabilitymentioning

confidence: 99%

“…The froth stability was measured using a modified Bikerman test method (Barbian et al, 2003). The experimental conditions were kept same as those of the coal flotation tests for coal B except that a rectangular transparent column (112 × 110 × 250 mm) was mounted on top of the flotation cell to prevent froth overflowing.…”

Section: Froth Stabilitymentioning

confidence: 99%

A comparative study of methyl cyclohexanemethanol and methyl isobutyl carbinol as frother for coal flotation

Park

Wang

2016

International Journal of Mineral Processing

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Methyl isobutyl carbinol (MIBC), an aliphatic alcohol, is widely used as a frothing reagent in coal flotation but it has safety concerns owing to its low flash point (approximately 40 °C). In the present work, we studied a cyclic alcohol, methyl cyclohexanemethanol (MCHM) with a high flash point (approximately 110 °C) and compared its coal flotation performance with that of MIBC. A bottom-driven mechanical flotation cell and two coking coals of distinct floatability, namely A and B, were used. Collectorless flotation tests were carried out with process water for coal A. Flotation tests with diesel as collector at 50 ppm were carried out with simulated process water (0.03 M NaCl solution) and highly saline water (0.5 M NaCl solution), respectively, for coal B. The flotation results showed that MCHM was an effective alternative to MIBC. The highly saline water produced sufficient frothing, obviating the necessity of adding MIBC or MCHM. To understand the effect of frother type and concentration and NaCl concentration on the coal flotation performance, we conducted surface tension measurement for the frother solutions, characterised the dispersion of air near bubble sparger, and measured the stabilities of froth, foam, and foam film. It was found that MCHM was more surface active and more capable of stabilizing froth and foam than MIBC.Foam film stability measured at a broad range of interface approach velocity followed a bellshaped trend and at a given NaCl concentration, the observed peak foam film stability of 15 ppm MCHM was higher than that of 15 ppm MIBC. Increasing NaCl concentration from 0.03 M to 0.5 M had the effect of stabilizing the froth and foam but destabilising the thin foam film.

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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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Dynamic froth stability in froth flotation

Cited by 95 publications

References 12 publications

Classification of Flotation Frothers

Classification of Flotation Frothers

A comparative study of methyl cyclohexanemethanol and methyl isobutyl carbinol as frother for coal flotation

Flotation Behavior of Bituminous and Lignite Coals in Salty Water

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