A fundamental investigation on the breakage of a bed of PGM ore particles: An attainable region approach, part 2

Hlabangana, N.; Nhira, E.; Masayile, N.; Tembo, Prichard Mekani; Danha, Gwiranai

doi:10.1016/j.powtec.2019.02.005

Cited by 6 publications

(15 citation statements)

References 20 publications

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“…This is possibly due to the different orientation of balls between the drop-weight test and ball mill set up, which are well-defined and stochastically varying, respectively. As for the ball shape, the AR analysis by Hlabangana et al [16] revealed that the ellipsoid produced the highest amount of m 2 whilst that of Emmanuel et al [25] suggested the sphere-shaped balls as the desired balls for maximising the production of m 3 . This consolidates the assertion that product requirements are also a function of ball shapes in a grinding environment.…”

Section: Discussion and The Future Of Ar In Comminutionmentioning

confidence: 99%

“…The ball mill is composed of a number of operational parameters. In some instances, researchers have focused on a particular operational parameter [8,9,11,[13][14][15][16][17]19,20,[22][23][24]26] whilst in some cases, the optimisation scheme focused on all parameters at once to achieve a given objective function [19]. This makes grinding materials in a manner conducive to achieving the objective function key to good mineral processing.…”

Section: Different Ar Application Scenariosmentioning

confidence: 99%

“…The work also demonstrated that large ball sizes were desirable if the key variable of interest is the amount of material in the fines (m 3 ) since they break most of the material directly from the feed (m 1 ) to the fine size fraction, in a single drop. Using the same drop weight technique, Hlabangana et al [16] used AR analysis to optimise the impact energy needed to break a bed of particles. What differentiates their work from that of Danha et al [12] is their objective function which was focused on the drop weight shape rather than the size.…”

Section: Ball Diametermentioning

confidence: 99%

“…In the same fashion, Emmanuel et al [25] conducted drop weight tests on Olivine sand and optimised the impact energy and particle size using the AR analysis. Their tests were done with drop weights of oval, cube and sphere shapes, albeit with a different objective function from that of Hlabangana et al [16], which was to maximise the production of m 2 . That of Emmanuel et al [25] was to optimise the production of m 3 .…”

Section: Ball Diametermentioning

confidence: 99%

“…Using the laboratory scale mill, Hlabangana et al [15] conducted tests and explored the effect of varying the feed and grinding media size distribution on the product fineness using AR. After that, Hlabangana et al [16] used the AR to analyse and optimise the impact energy on a bed of PGM, particularly focusing on the effect of drop weight shape on the product fineness.…”

Section: Introductionmentioning

confidence: 99%

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A Review of the Milestones Reached by the Attainable Region Optimisation Technique in Particle Size Reduction

Chimwani

2021

Minerals

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The attainable region (AR) is an optimization method adopted for use in comminution to achieve different objective functions, which all converge to optimising the production of the desired particle size distributions for downstream processes. The technique has so far mostly been used to optimise the breakage of particles in tumbling mills. It achieved the desired purpose by unveiling all possible outcomes derived from a combination of operational parameters that are bound by trajectories showing the limitations of a system. The technique has given the scientific community lenses to see the behaviour of different parameters in ball mills otherwise known as the black boxes due to their concealing nature. Since its inception, the AR technique has been applied to data obtained from the laboratory tests and simulated industrial mills and the results sometimes contradict or confirm the conventional milling practices in the industry. This makes the already conservative mining industry sceptical about its adoption. This review thus assesses the milestone covered as far as the AR development in comminution is concerned. It also helps to clarify the sources of the discrepancies between the AR results and the conventional knowledge concerning the optimisation of ball mill operational parameters.

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Section: Discussion and The Future Of Ar In Comminutionmentioning

confidence: 99%

Section: Different Ar Application Scenariosmentioning

confidence: 99%

Section: Ball Diametermentioning

confidence: 99%

Section: Ball Diametermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Review of the Milestones Reached by the Attainable Region Optimisation Technique in Particle Size Reduction

Chimwani

2021

Minerals

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An investigation on the breakage behavior of olivine sand particles: An attainable region technique

Emmanuel

Anggraini

Asadi³

2022

Advanced Powder Technology

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Effect of grinding media shape on the particle size distribution of UG2 ore using the response surface methodology central composite design

Matsanga,

Nheta,

Chimwani

2024

Mineral Processing and Extractive Metallurgy: Transactions of t

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In this study, the effects of truncated ellipsoids and cubes on the particle size distribution of a UG2 ore were compared to the spheres using the response surface methodology for experimental design, modeling, and optimization. The response surface methodology demonstrated that it can be useful in optimizing grinding operations. It provides lenses to see and analyze the behavior of the ball filling, interstitial filling, and % solids parameters which are complex and interactive, and their effects on the production of the desired product (−75 µm) for different grinding media. Spherical grinding media outperformed truncated ellipsoids and cubes, producing the highest amount of the desired size class (82.58%), followed by 80.41% for truncated ellipsoids and 77.07% for cubes. Spheres also consumed the least power followed by cubes and lastly truncated ellipsoids. The differences in optimal grinding conditions were attributed to different contact mechanisms, surface area, and load behavior of the grinding media.

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A fundamental investigation on the breakage of a bed of PGM ore particles: An attainable region approach, part 2

Cited by 6 publications

References 20 publications

A Review of the Milestones Reached by the Attainable Region Optimisation Technique in Particle Size Reduction

A Review of the Milestones Reached by the Attainable Region Optimisation Technique in Particle Size Reduction

An investigation on the breakage behavior of olivine sand particles: An attainable region technique

Effect of grinding media shape on the particle size distribution of UG2 ore using the response surface methodology central composite design

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