Hydrodynamic Characterization of Industrial Flotation Machines Using Radioisotopes

Yianatos, J.; Díaz, Francisco Javier Llorca

doi:10.5772/24512

Cited by 5 publications

(7 citation statements)

References 20 publications

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“…Despite the previous finding that solid particles (mainly in the coarse class) have lower residence times (Yianatos and Díaz, 2011), the RTD shapes for solid tracer were no significantly different from the liquid RTDs. As a result, the same model structure for liquid and solid RTD (per size class) was used in a single cell.…”

Section: Modelling Of Single Flotation Cellsmentioning

confidence: 49%

“…The tests allow the identification of the flow regime (dispersion) and effective cell volume occupied by the different phases. A detailed description of the experimental procedure is presented in Yianatos and Díaz (2011).…”

Section: Methodsmentioning

confidence: 99%

“…For instance, Lelinski et al (2002) reported effective volumes for industrial flotation cells of 148-160 m 3 using RTD measurements. More recently, Yianatos and Díaz (2011) studied mixing regimes, residence time distributions, pulp circulation and solid segregation in industrial mechanical cells.…”

Section: Introductionmentioning

confidence: 99%

“…(2), which presented a better fit to industrial data than the classic perfect mixing approach. This model structure consists of one large perfect mixer (residence time s L ) and one small perfect mixer in series (residence time s S ) plus a dead time (Yianatos and Díaz, 2011 …”

Section: Introductionmentioning

confidence: 99%

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Modelling of residence time distribution of liquid and solid in mechanical flotation cells

Yianatos

Bergh

Vinnett

et al. 2015

Minerals Engineering

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Section: Modelling Of Single Flotation Cellsmentioning

confidence: 49%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modelling of residence time distribution of liquid and solid in mechanical flotation cells

Yianatos

Bergh

Vinnett

et al. 2015

Minerals Engineering

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“…Radial launders can be added to donut launder designs [9]. Yianatos and Diaz [66] reported that radial launders decrease the horizontal transport distance of the froth, especially in large flotation cells. Contreras et al [67] observed that by shortening the average distance from the froth crowder to the overflow launder, the recovery of valuable minerals (true flotation) increases considerably compared to the recovery of water and fine gangue.…”

Section: Radial Laundersmentioning

confidence: 99%

A Review of Flotation Physical Froth Flow Modifiers

Jera

Bhondayi

2021

Minerals

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Over the past few decades, the need to process more minerals while lowering capital costs has led to an increase in the size of flotation cells, e.g., 0.03 m3 to 1000 m3. However, this increase has created new challenges in the operation and design of industrial flotation cells, particularly in terms of froth removal, because the distance the froth must travel increases with an increase in the flotation cell diameter. This has a negative impact on recovery. Physical froth flow modifiers can be used to improve froth removal. Their major functions are to modify and optimise the flow of the froth, improve froth drainage, reduce dead zones, and improve froth flow and removal dynamics. Therefore, physical froth flow modifiers are discussed, evaluated, and compared in this paper. The literature indicates that physical froth flow modifiers such as crowders and launders are used extensively as industrial solutions to enhance froth transport and recovery in large flotation cells. Other modifiers (including froth baffles and froth scrapers) have been found to have a profound effect on local froth phase sub-processes, including drainage and bubble coalescence. However, industrial uptake is either dwindling or limited to small-volume rectangular/U-shaped cells in the case of scrapers, or, there is no uptake at all in the case of froth baffles. Further research on how some of the physical modifiers (e.g., baffles and launders) impact the selectivity of particles is required.

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