Reproducibility of Bond grindability work index

Kaya, Erol; Fletcher, Philip; Thompson, Pamela

doi:10.1007/bf03403146

Cited by 5 publications

(3 citation statements)

References 1 publication

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“…In the case of the research presented in [10], the results of this research, carried out on a porphyry copper ore, concluded that the Bond work index values differ with different Bond ball mills and with different grinding ball charge distributions, but variations were higher when comparing different Bond ball mills than when comparing different ball charges in the same mill. Maximum variations of 8.6% with different mills and 6.2% with different grinding ball charges were measured.…”

Section: Introductionmentioning

confidence: 90%

“…Moreover, w i should be one of the key parameters to consider in a potential process plant digitalization action, using adequate measurable parameters correlation. Despite this, the variability of w i when performing the ball mill Bond's standard test is not always considered or understood at an industrial scale [9][10][11][12][13]. In the study presented by Mosher and Tague [9], they addressed the variability of Bond test results independent of sampling or procedural variation.…”

Section: Introductionmentioning

confidence: 99%

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Variability of the Ball Mill Bond’s Standard Test in a Ta Ore Due to the Lack of Standardization

García

Coello-Velázquez

Pérez

et al. 2021

Metals

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There is no doubt about the practical interest of Fred Bond’s methodology in the field of comminution, not only in tumbling mills design and operation but also in mineral raw materials grindability characterization. Increasing energy efficiency in comminution operations globally is considered a significant challenge involving several Sustainable Development Goals (SDGs). In particular, the Bond work index (wi) is considered a critical parameter at an industrial scale, provided that power consumption in comminution operations accounts for up to 40% of operational costs. Despite this, the variability of wi when performing the ball mill Bond’s standard test is not always understood enough. This study shows the results of a variability analysis (a 33 factorial design) performed to elucidate the influence on wi of several parameters obtained from the particle size distribution (PSD) in feed and product. Results showed a clear variability in the work and grindability indexes with some of the variables considered.

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Section: Introductionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Variability of the Ball Mill Bond’s Standard Test in a Ta Ore Due to the Lack of Standardization

García

Coello-Velázquez

Pérez

et al. 2021

Metals

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“…According to one isolated study, the Bond Work Index measured by three different mills that were side by side varied as low as 4.2% and up to 8.6%. Even variations within the distribution of the ball charge will result in differences between 2.9% and 8 6.9% [11]. Thus, even though there are difficulties in reproducing Bond Work Indices and there is variability in the results, the quantity is one of the better measures of the energy required in a grinding circuit and persists in engineering design.…”

Section: Introductionmentioning

confidence: 99%

A Statistical Comparison of Bond Ball Mill Grindability Work Index Testing Equipment

Anderson¹

2022

AMMS

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Research was performed to make an objective comparison of Bond Ball Mill Grindability Work Index results derived from using two commercial testing apparatus, from BICO and Sepor respectively, each with a different mill shell design. Six tests were carefully performed with both mills using the same aggregate rock sample and with the same method of grindability testing based on Fred Bond's Ball Mill Grindability Work Index (BWi) testing methods. After the tests were completed, statistical analysis using the Q test, p values, the F test and the student t test were used to confirm and compare the data sets derived from both commercially available testing equipment. The result of this testing indicates that the design of the Sepor ball mill delivers less variable BWi results than the BICO ball mill. As well, the Sepor mill returned a significantly higher and more reproducible mean BWi value of 12.238kWhr/t versus the BICO BWi mean value of 10.786kWhr/t in testing of the same material. It is postulated that the differing shell design on the BICO mill is the root cause of these differences.

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Metallurgical Test Work

Angove¹,

Acar

2016

Gold Ore Processing

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Reproducibility of Bond grindability work index

Cited by 5 publications

References 1 publication

Variability of the Ball Mill Bond’s Standard Test in a Ta Ore Due to the Lack of Standardization

Variability of the Ball Mill Bond’s Standard Test in a Ta Ore Due to the Lack of Standardization

A Statistical Comparison of Bond Ball Mill Grindability Work Index Testing Equipment

Metallurgical Test Work

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