Characterizing Frothers using Gas Hold-Up

Azgomi, F.; Gómez, C.O.; Finch, J.A.

doi:10.1179/cmq.2007.46.3.237

Cited by 20 publications

(4 citation statements)

References 12 publications

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“…The values of CCC can be also predicted basing on the number of carbon in the alkyl group of the reagent [49]. The classification of frothers can be also based on the gas hold-up influenced by the frother concentration [48] (Figure 7). It can be done by vertical cross-section of the plot and determination, for instance the gas hold-up at 2 mmol/dm 3 of frother or shortly GH02.…”

Section: Kpf6mentioning

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: Kpf6mentioning

confidence: 99%

Classification of Flotation Frothers

Drzymala

Kowalczuk

2018

Minerals

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“…This is due to an effect on the bubble size (or coalescence reduction). However, concentrations over 10 [ppm] (polyglycols) should be over critical coalescence (Azgomi et al, 2006) and, therefore, recovery should not be affected. However, entrainment could explain recovery with the frother dosage and the concentrate grade decrease (Kratch et al,2012).…”

Section: Operational Curve Comparison With Types Of Water For Cu and Momentioning

confidence: 99%

The effect of water quality change on copper flotation

Acuña,

Aedo,

Leiva

et al. 2024

Physicochem. Probl. Miner. Process.

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Given the significant consumption and future demand for water resources, this paper intends to find the conditions for using a flotation process with different water quality. One of the alternatives is using water under secondary treatment with industrial water mixtures to partly recycle domestic wastewater and maximize metallurgical benefits. Results show that using wastewater (only with secondary treatment) in flotation is detrimental to copper recovery. However, molybdenum recovery is significantly improved. For mixtures with 50 [%] wastewater, 50 [ppm] frother, 20 [ppm] collector, and pH 10, copper recovery decrease amounts to 0.4 [%], while molybdenum shows a 2.4 [%] recovery increase. In addition, copper concentrate grade decreases by 1.4 [%], while molybdenum grade remains. Therefore, using wastewater is viable, particularly in the case of molybdenum. So, this study proposes using of water mixtures in the copper depression stage to improve molybdenum recovery.

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“…The bubble size is an important parameter for evaluating the gas dispersion capacity of a flotation machine . The gas holdup distribution is considered as a macroscopic representation of entire bubbles in a flotation cell, which plays a vitally important role in evaluating the flotation recovery and grade, and thereby, the gas dispersion of the flotation machine is evaluated in terms of the gas holdup. , …”

Section: Introductionmentioning

confidence: 99%

“…7 The gas holdup distribution is considered as a macroscopic representation of entire bubbles in a flotation cell, which plays a vitally important role in evaluating the flotation recovery and grade, 8 and thereby, the gas dispersion of the flotation machine is evaluated in terms of the gas holdup. 9,10 It has been revealed that the bubble size was much larger at the concentration lower than the critical coalescence concentration (CCC), and coalescence behaviors of bubbles can be prevented at frother concentration exceeding CCC. 11 For different frother systems, the rise velocity of a 1.45 mm diameter bubble was measured to make sense of the variance in the gas holdup, which demonstrated that the gas holdup comprehensively investigated the parameters such as the bubble rise velocity, bubble size, and frother type.…”

Section: Introductionmentioning

confidence: 99%

Gas Dispersion Characteristics in a Novel Jet-Stirring Coupling Flotation Device

et al. 2022

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A jet-stirring coupling flotation device (JSCFD) was proposed to analyze the distribution characteristics of gas holdup and bubble Sauter mean diameter (D 32 ) in a gas−liquid system under various parameters. Results of studies suggested that the gas holdup increased with methyl isobutyl carbinol concentration, feeding pressure, and gas flow rate. The maximal gas holdup in the absence of the stirring impeller was ∼23.29% for the bubble size of 0.59 mm, which was considerably lower than the maximum gas holdup of 66.27% for the bubble size of 0.31 mm in the presence of the stirring impeller; the gas holdup was raised by ∼43% due to the bubbles torn by the stirring impeller to generate extensive smaller size bubbles and increase the content of small bubbles, and increasing the stirring impeller speed was conducive to reduce the bubble size and increase the gas holdup in JSCFD. Compared to traditional flotation machines, the size of bubbles generated by JSCFD was smaller, and the gas holdup distribution conforms to the following order: JSCFD > mechanical flotation machine > column flotation, which demonstrated that the JSCFD had a noticeable effect on increasing the gas holdup and reducing the bubble size.

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Characterizing Frothers using Gas Hold-Up

Cited by 20 publications

References 12 publications

Classification of Flotation Frothers

Classification of Flotation Frothers

The effect of water quality change on copper flotation

Gas Dispersion Characteristics in a Novel Jet-Stirring Coupling Flotation Device

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