Determining the significance of flotation variables on froth rheology using a central composite rotatable design

Li, Chao; Farrokhpay, Saeed; Runge, Kym; Shi, Fengnian

doi:10.1016/j.powtec.2015.10.013

Cited by 14 publications

(11 citation statements)

References 30 publications

(42 reference statements)

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“…froth height, gas rate, impeller speed, feed particle size and feed grade) on froth rheology. A Central Composite Rotatable Design (CCRD) study was carried out, in which 33 flotation tests were performed in a 20 L continuously-operated flotation cell [20]. The froth rheology was measured using a method developed recently by the authors [21].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Effect of flotation froth properties on froth rheology

Runge

Shi

et al. 2016

Powder Technology

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Froth flotation is a widely used process of particle separation exploiting differences in surface properties. The froth performance in a flotation cell is expected to be affected by the froth rheology, as it affects the froth residence time that determines the probability of recovery of valuable minerals in the froth phase. Flotation froths have a similar structure to the gas-liquid foams whose rheology has been widely studied. However, to date, very little work has been done in the rheology of flotation froths owing to their instability and the presence of solid particles (on bubble surfaces and in the Plateau borders) that are believed to influence froth rheology and complicate any investigation. In this paper, the effects of froth properties on froth rheology were studied by examining the results of 33 flotation tests performed under various conditions that resulted in changes in the froth properties and, consequently, the froth rheology. The experiments were performed in a 20 L continuous flotation cell. It was found that the bubble size and the fraction of lamellae covered by solids defined the froth rheology, while the presence of particles in the Plateau borders contributed very little to the froth rheology. A model structure was developed by taking into account froth properties to predict froth viscosity.

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Section: Accepted Manuscriptmentioning

confidence: 99%

Effect of flotation froth properties on froth rheology

Runge

Shi

et al. 2016

Powder Technology

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“…Froth flow is also an irreversible process, which involves the rearrangement of bubbles and changes in bubble surface area [13]. In a series of flotation tests, in both pilot and industrial scale, conducted by [87][88][89][90]; the measured froths showed pseudoplastic behaviour. In their flotation tests, flotation variables including frother dosage, feed grade, air rate, froth depth, impeller speed, and valuable mineral particle size were investigated with respect to froth rheology [88,89].…”

Section: Variables Affecting Froth Rheologymentioning

confidence: 99%

“…In their flotation tests, flotation variables including frother dosage, feed grade, air rate, froth depth, impeller speed, and valuable mineral particle size were investigated with respect to froth rheology [88,89]. Table 2 shows the variables that significantly affected froth rheology [89]. Feed grade and froth height were positively correlated with froth apparent viscosity, whereas particle size and impeller speed were negatively correlated with froth apparent viscosity.…”

Section: Variables Affecting Froth Rheologymentioning

confidence: 99%

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A Brief Review of Pulp and Froth Rheology in Mineral Flotation

Wang

2020

Journal of Chemistry

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In mineral flotation, rheological problems have limited the efficient upgrading of low-grade and complex ores. Since pulp and froth rheology are deemed to play different roles in influencing the separation performance, in this paper, a brief review on pulp and froth rheology in flotation is provided, with an objective of developing a basic understanding of rheology in flotation. The essential variables that affect the rheology of a flotation pulp and froth are discussed. The methods for measuring pulp and froth rheology are presented. The correlations of pulp and froth rheological properties to flotation performance are reviewed. Strategies that are currently used to mitigate the deleterious effects of problematic ores in flotation are also provided for flotation optimization. Research gaps are also proposed to highlight the need of further exploration of flotation rheology in future.

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“…The central composite rotatable design model (CCRD) was used as experimental design at different fields [15][16][17]. In the present study, the weight of the Albizia plant, concentration of dye, and time of adsorption were identified as main parameters, while the efficiency of adsorption was taken as an objective variable in the central composite rotatable design model (CCRD).…”

Section: Central Composite Rotatable Design Modelmentioning

confidence: 99%

Optimization of dye adsorption process for Albizia lebbeck pods as a biomass using central composite rotatable design model

Mahdi

Al-Mashhadani

Eisa

2019

CI&CEQ

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Article Highlights• Highest adsorption efficiencies were obtained at low concentrations and low weights • Increasing the adsorption time can possibly have a negative effect on efficiency • Adsorption time parameter can be a positive factor at high concentrations and biomass Abstract Albizia lebbeck biomass was used as an adsorbent material in the present study to remove methyl red dye from an aqueous solution. A central composite rotatable design model was used to predict the dye removal efficiency. The optimization was accomplished under a temperature and mixing control system (37 °C) with different particle size of 300 and 600 μm. Highest adsorption efficiencies were obtained at lower dye concentrations and lower weight of adsorbent. The adsorption time, more than 48 h, was found to have a negative effect on the removal efficiency due to secondary metabolites compounds. However, the adsorption time was found to have a positive effect at high dye concentrations and high adsorbent weight. The colour removal efficiency was found to increase with the increase in methyl red concentration and decrease the adsorption time at constant adsorbent weight.

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Determining the significance of flotation variables on froth rheology using a central composite rotatable design

Cited by 14 publications

References 30 publications

Effect of flotation froth properties on froth rheology

Effect of flotation froth properties on froth rheology

A Brief Review of Pulp and Froth Rheology in Mineral Flotation

Optimization of dye adsorption process for Albizia lebbeck pods as a biomass using central composite rotatable design model

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