Use of frother with sampling-for-imaging bubble sizing technique

Zhang, Wei; Kolahdoozan, Morteza; Nesset, Jan E.; Finch, J.A.

doi:10.1016/j.mineng.2008.11.004

Cited by 24 publications

(6 citation statements)

References 10 publications

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“…Mixing was important for the longer chain alcohol frothers (i.e., lower solubility reagents). The frother concentration prepared for the MBSA was high enough to prevent bubble coalescence in the assembly (Zhang et al, 2009). Prior to each experiment, the column was rinsed in hot water and the sparger sonicated for at least half an hour.…”

Section: Methodsmentioning

confidence: 99%

Determining independent control of dual-frother systems – Gas holdup, bubble size and water overflow rate

Zhang

Zhou

Finch

2012

Minerals Engineering

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Section: Methodsmentioning

confidence: 99%

Determining independent control of dual-frother systems – Gas holdup, bubble size and water overflow rate

Zhang

Zhou

Finch

2012

Minerals Engineering

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“…Frother solutions were prepared for the cell ("cell concentration") and for the MBSA assembly ("chamber concentration") independently. The chamber concentration was kept at least above the CCC75 for surfactant (frother) being tested to prevent coalescence in the sampling tube [24]. Fifteen minutes of agitation at 4200 rpm without air prior to testing ensured the frother was fully mixed.…”

Section: Apparatusmentioning

confidence: 99%

Characterizing Frothers through Critical Coalescence Concentration (CCC)95-Hydrophile-Lipophile Balance (HLB) Relationship

Zhang

Nesset²,

Rao

et al. 2012

Minerals

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Frothers are surfactants commonly used to reduce bubble size in mineral flotation. This paper describes a methodology to characterize frothers by relating impact on bubble size reduction represented by CCC (critical coalescence concentration) to frother structure represented by HLB (hydrophile-lipophile balance). Thirty-six surfactants were tested from three frother families: Aliphatic Alcohols, Polypropylene Glycol Alkyl Ethers and Polypropylene Glycols, covering a range in alkyl groups (represented by n, the number of carbon atoms) and number of Propylene Oxide groups (represented by m). The Sauter mean size (D 32 ) was derived from bubble size distribution measured in a 0.8 m 3 mechanical flotation cell. The D 32 vs. concentration data were fitted to a 3-parameter model to determine CCC95, the concentration giving 95% reduction in bubble size compared to water only. It was shown that each family exhibits a unique CCC95-HLB relationship dependent on n and m. Empirical models were developed to predict CCC95 either from HLB or directly from n and m. Commercial frothers of known family were shown to fit the relationships. Use of the model to predict D 32 is illustrated.

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“…Over the past decade, methodologies for optimizing grinding and flotation plants using plant data together with semi-empirical sub-process models have been developed by research groups at the Julius Krutschnitt Minerals Research Centre (JKMRC) (Brisbane, Australia), University of Cape Town (Cape Town, South Africa), and McGill University (Montreal, QC, Canada) [6][7][8][9][10][11][12][13]. The culmination of the work done by JKMRC was the JKSimMet simulation model developed by JKTech (the technology transfer company of JKMRC).…”

Section: Requirement For Circuit Simulationmentioning

confidence: 99%

Optimizing Performance of SABC Comminution Circuit of the Wushan Porphyry Copper Mine—A Practical Approach

Zhang

2016

Minerals

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This research is focused on the Phase I SABC milling circuit of the Wushan porphyry copper mine. Improvements to the existing circuit were targeted without any significant alterations to existing equipment or the SABC circuit. JKSimMet simulations were used to test various operating and design conditions to improve the comminution process. Modifications to the SABC comminution circuit included an increase in the SAG mill ball charge from 8% to 10% v/v; an increase in the mill ball charge from 23% v/v to 27% v/v; an increase in the maximum operating power draw in the ball mill to 5800 kW; the replacement of the HP Series pebble crusher with a TC84 crusher; and the addition of a pebble bin. Following these improvements, an increase in circuit throughput, a reduction in energy consumption, and an increase in profitability were obtained.

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Use of frother with sampling-for-imaging bubble sizing technique

Cited by 24 publications

References 10 publications

Determining independent control of dual-frother systems – Gas holdup, bubble size and water overflow rate

Determining independent control of dual-frother systems – Gas holdup, bubble size and water overflow rate

Characterizing Frothers through Critical Coalescence Concentration (CCC)95-Hydrophile-Lipophile Balance (HLB) Relationship

Optimizing Performance of SABC Comminution Circuit of the Wushan Porphyry Copper Mine—A Practical Approach

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