Not another HPGR trade-off study!

Amelunxen, P.; Meadows, D. G.

doi:10.1007/bf03402317

Cited by 4 publications

(4 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to Amelunxen and Meadows [42], the CAPEx of comminution circuits of ores with low hardness based on HPGR was estimated to be 6.4% higher than that of a circuit using only conventional (cone) crushing for the same type of ore. As ore hardness increases, this difference in CAPEx decreases, so that for hard ores, the capital cost for a coarse comminution circuit that relies exclusively on cone crushing can be even higher than for the HPGR-based circuit. Furthermore, the authors mentioned that the CAPEx of circuits based on SAG mills is always lower than those that rely on cone crushing or HPGR.…”

Section: Resultsmentioning

confidence: 99%

“…Some of the assumptions on prices are based on the work by Rodrigues et al [12,25]: US$1.95/kg for grinding media, US$0.06M for crusher liner, US$2.3M for ball mill liner, and US$2.6M for SAG mill liner. In the case of wear of the HPGR, an estimate of cost published by Amelunxen and Meadows [42], corresponding to US$1.8M for each roll changeover, was used. The present work does not provide estimates of labor, automation, or administrative and general costs.…”

Section: Economic Indicators Based On Cost Estimationmentioning

confidence: 99%

See 1 more Smart Citation

Holistic Pre-Feasibility Study of Comminution Routes for a Brazilian Itabirite Ore

2021

View full text Add to dashboard Cite

Comminution is an essential step in processing itabirite ores, given the need to liberate silica and other contaminants from the iron minerals for downstream concentration and then pellet feed production. In general, these ores in Brazil are not particularly hard to crush and grind, but both capital (CAPEx) and operating (OPEx) expenditures in this stage of preparation can be critical for the project, in particular due to uncertainties in iron ore prices. Several circuits have been designed and are in operation for this type of ore in Brazil; however, it is not yet clear which technologies are more cost-effective and in which configuration they should be applied. This work critically analyzes four comminution circuits for an undisclosed case study. For these circuits, CAPEx, OPEx, and some environmental sustainability indices, as well as qualitative technical criteria, were used in the comparisons. This work concludes that two of these process routes, especially those based on more energy-efficient technologies (and one of these still rarely explored even at bench-scale), have demonstrated to be very attractive from multiple standpoints.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Economic Indicators Based On Cost Estimationmentioning

confidence: 99%

Holistic Pre-Feasibility Study of Comminution Routes for a Brazilian Itabirite Ore

2021

View full text Add to dashboard Cite

show abstract

“…HPGRs do not need steel grinding media and throughput is less impacted by changes in ore hardness. Therefore, HPGR could prove economically beneficial when considering the variability in ore hardness [29]. Micro-cracking is a further advantage of using an HPGR.…”

Section: Comminutionmentioning

confidence: 99%

“…Daniel [30] showed that micro-cracking was present when ore was ground in the HPGR. Micro-cracks reduce the Bond ball mill work index of 10-25%, when compared with the product from a tertiary cone crusher [29,31,32] and that the HPGR is likely to result in weaker coarser particles, owing to microcracking, and intact fines.…”

Section: Comminutionmentioning

confidence: 99%

Challenges Related to the Processing of Fines in the Recovery of Platinum Group Minerals (PGMs)

et al. 2021

View full text Add to dashboard Cite

In order to increase the recovery of PGMs by flotation, it is necessary to optimise the liberation of the key minerals in which the platinum group elements (PGEs) are contained which include sulphides, arsenides, tellurides, and ferroalloys among others, while at the same time ensuring the optimal depression of gangue minerals. In order to achieve this, comminution circuits usually consist of two or three stages of milling, in which the first stage is autogeneous, followed by ball milling. Further liberation is achieved in subsequent stages using ultra-fine grinding. Each comminution stage is followed by flotation in the so-called MF2 or MF3 circuits. While this staged process increases overall recoveries, overgrinding may occur, hence creating problems associated with fine particle flotation. This paper presents an overview of the mineralogy of most of the more significant PGM ores processed in South Africa and the various technologies used in comminution circuits. The paper then summarises the methodology used in flotation circuits to optimise recovery of fine particles in terms of the collectors, depressants, and frothers used. The effect of entrainment, slimes coating, changes in rheology caused by the presence of a significant amount of fines and of chromite recovery is addressed.

show abstract

Comparison of the performance of different comminution technologies in terms of energy efficiency and mineral liberation

Baawuah

Kelsey²,

Addai‐Mensah

et al. 2020

Minerals Engineering

View full text Add to dashboard Cite

Not another HPGR trade-off study!

Cited by 4 publications

References 2 publications

Holistic Pre-Feasibility Study of Comminution Routes for a Brazilian Itabirite Ore

Holistic Pre-Feasibility Study of Comminution Routes for a Brazilian Itabirite Ore

Challenges Related to the Processing of Fines in the Recovery of Platinum Group Minerals (PGMs)

Comparison of the performance of different comminution technologies in terms of energy efficiency and mineral liberation

Contact Info

Product

Resources

About