Frother Characterization Using a Novel Bubble Size Measurement Technique

Wang, Junyu; Forbes, Gordon; Forbes, Elizaveta

doi:10.3390/app12020750

Cited by 10 publications

(4 citation statements)

References 19 publications

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“…Additionally, the literature describes the significance of dissolved ions not only at mineral/air and mineral/water interfaces but also at air/water interfaces. For example, the dissolved ions behave like a frother in the system, showing that the bubble size in the pulp phase is reduced upon increasing the electrolyte concentration [68,69].…”

Section: Discussionmentioning

confidence: 99%

Synergistic Effect of Frequently Found Ions in the Flotation of Pb-Zn Sulfide Ores on Air/Water Interface

Gungoren,

Muse,

Terzi

et al. 2023

Minerals

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The aqueous ions influence the properties of air bubbles and, therefore, the recovery of flotation. This study aims to reveal the synergistic effect of frequently found ions in the flotation of Pb-Zn sulfide ores. In this context, dynamic surface tension measurements, bubble coalescence time, Sauter mean diameter (SMD), bubble size distribution (BSD), and dynamic foam stability (DFS) measurements were carried out using artificial process waters (APWs). APW with the minimum ion concentration is expressed as “APW1” with the ionic strength (I) of 0.03 mol/dm3. The concentration of the ions in APW1 was increased by 3, 5, and 10 times, and thus APW3 (I = 0.08 mol/dm3), APW5 (I = 0.13 mol/dm3), and APW10 (I = 0.26 mol/dm3) were prepared, respectively. The results of this study indicated that the surface tension increased slightly in the presence of APW related to the ion concentration. Potassium ethyl xanthate (KEX) at high concentrations was effective in the reduction of surface tension. As the APW concentration increased, finer bubbles were obtained with a narrower size range. The stability of the foam increased with butyl glycol (BG) and APW concentration. There was no need to use a frother (BG) for the flotation experiments in the presence of APW1 or APWs with higher ionic strength.

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Section: Discussionmentioning

confidence: 99%

Synergistic Effect of Frequently Found Ions in the Flotation of Pb-Zn Sulfide Ores on Air/Water Interface

Gungoren,

Muse,

Terzi

et al. 2023

Minerals

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“…Meanwhile the direct measurement of the interfacial surface is a well-known challenge [22]. Various bubble size measurement tools have been developed and are in use both in research and industry to provide the determination of the gas bubble sizes, e.g., the Mettler Toledo ParticleViewTM Measurement probe (PVM) or The Analyzer EasyViewer 100 System, as well as The Anglo Platinum Bubble Sizer (APBS) probe manufactured by Stone Three, comparative analysis for which was performed by [23]. However, these methods and tools have limitations that significantly narrow the possibility of using them for project tasks.…”

Section: Introductionmentioning

confidence: 99%

Assessing the Mass Transfer Coefficient in Jet Bioreactors with Classical Computer Vision Methods and Neural Networks Algorithms

et al. 2023

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Development of energy-efficient and high-performance bioreactors requires progress in methods for assessing the key parameters of the biosynthesis process. With a wide variety of approaches and methods for determining the phase contact area in gas–liquid flows, the question of obtaining its accurate quantitative estimation remains open. Particularly challenging are the issues of getting information about the mass transfer coefficients instantly, as well as the development of predictive capabilities for the implementation of effective flow control in continuous fermentation both on the laboratory and industrial scales. Motivated by the opportunity to explore the possibility of applying classical and non-classical computer vision methods to the results of high-precision video records of bubble flows obtained during the experiment in the bioreactor vessel, we obtained a number of results presented in the paper. Characteristics of the bioreactor’s bubble flow were estimated first by classical computer vision (CCV) methods including an elliptic regression approach for single bubble boundaries selection and clustering, image transformation through a set of filters and developing an algorithm for separation of the overlapping bubbles. The application of the developed method for the entire video filming makes it possible to obtain parameter distributions and set dropout thresholds in order to obtain better estimates due to averaging. The developed CCV methodology was also tested and verified on a collected and labeled manual dataset. An onwards deep neural network (NN) approach was also applied, for instance the segmentation task, and has demonstrated certain advantages in terms of high segmentation resolution, while the classical one tends to be more speedy. Thus, in the current manuscript both advantages and disadvantages of the classical computer vision method (CCV) and neural network approach (NN) are discussed based on evaluation of bubbles’ number and their area defined. An approach to mass transfer coefficient estimation methodology in virtue of obtained results is also represented.

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“…Several bubble viewer apparatuses have been described, including the McGill Bubble Size Analyzer [7,8] and the Anglo Platinum Bubble Sizer (APBS) [9,10]. These apparatuses work under a common principle: the bubbles are sampled from the pulp using a sampling tube and rise to a viewing chamber, where they are photographed to be analysed using image analysis software [11,12].…”

Section: Introductionmentioning

confidence: 99%

The Role of Stereological Assumptions in Bubble Size Estimations and Their Implications for Assessing Critical Coalescence Concentrations

Vinnett

Mesa

2023

Minerals

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Accurate measurement of bubble size is critical for assessing flotation performance. However, the 3D nature of bubbles, in contrast to the 2D nature of photographs obtained using a bubble viewer apparatus, may lead to distortions related to stereological assumptions. This study aimed to quantify the impact of these stereological effects on bubble size measurements in frother characterisations. Our results showed that different assumptions regarding bubble shape and volume resulted in variations in bubble size calculations of up to 10%. Furthermore, these stereological effects were propagated to the calculation of the critical coalescence concentration, leading to uncertainties of up to 14% depending on the type of frother. These findings emphasise the importance of considering stereological effects and selecting an appropriate calculation method when measuring bubble size for flotation and reagent assessments.

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Frother Characterization Using a Novel Bubble Size Measurement Technique

Cited by 10 publications

References 19 publications

Synergistic Effect of Frequently Found Ions in the Flotation of Pb-Zn Sulfide Ores on Air/Water Interface

Synergistic Effect of Frequently Found Ions in the Flotation of Pb-Zn Sulfide Ores on Air/Water Interface

Assessing the Mass Transfer Coefficient in Jet Bioreactors with Classical Computer Vision Methods and Neural Networks Algorithms

The Role of Stereological Assumptions in Bubble Size Estimations and Their Implications for Assessing Critical Coalescence Concentrations

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