Comminution test method using small drill core samples

Mwanga, Abdul; Lamberg, Pertti; Rosenkranz, Jan

doi:10.1016/j.mineng.2014.12.009

Cited by 18 publications

(9 citation statements)

References 18 publications

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“…For determining the effect of EPF treatment in comparison with the conventional crushing of the samples, a small scale grindability test has been applied. The test is part of the Geometallurgical Comminution Test (GCT) and uses only 220 g of pre-crushed material and much less processing time for getting a measure for ore grindability and an estimate of the Bond ball mill work index (Mwanga et al, 2015). The procedure involves dry batch grinding in a small laboratory ball mill that has a volume of ca 1.4 L only.…”

Section: Small Scale Grindability Testmentioning

confidence: 99%

Comparative laboratory study of conventional and Electric Pulse Fragmentation (EPF) technologies on the performances of the comminution and concentration steps for the beneficiation of a scheelite skarn ore

Bru

Beaulieu

Sousa

et al. 2020

Minerals Engineering

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Electric Pulse Fragmentation (EPF) is an innovative technology that uses High-Voltage Pulsed Power (HVPP) for the selective comminution of a material. This paper aims to compare a beneficiation flowsheet including an EPF treatment in the comminution circuit to a conventional pathway where the EPF step was replaced by a series of jaw crushers. Tests were performed on a skarn ore containing scheelite as the main mineral of interest. This ore is characterized by a finegrained mineralogy and represents a challenge to conventional comminution processing, requiring fine grinding to liberate the valuable minerals. Fine grinding has high energy requirements and Kathy Bru Formal analysis Investigation Methodology Conceptualization a,⁎

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Section: Small Scale Grindability Testmentioning

confidence: 99%

Comparative laboratory study of conventional and Electric Pulse Fragmentation (EPF) technologies on the performances of the comminution and concentration steps for the beneficiation of a scheelite skarn ore

Bru

Beaulieu

Sousa

et al. 2020

Minerals Engineering

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“…Rock mechanical tests such as the JK Tech drop weight test (Napier-Munn et al, 1996), the JK Rotary Breakage Test (Shi et al, 2009), the SMC test (Morrell, 2004), and standard Bond grindability test (Bond, 1952) require at least 10 kg of material. The amount of material required for the procedures may, according to Mwanga et al (2015), be an issue for greenfield exploration activities. Hence, Mwanga et al (2015) developed the geometallurgical comminution test (GCT) as an approach to achieve representative results for test batches of 220 g material.…”

Section: Previous Relevant Geometallurgical Researchmentioning

confidence: 99%

“…Contrary to previous work (e.g., Lopera, 2014;Mwanga et al, 2015), the classification is performed before surface hardness measurements and grindability testing. This approach is similar to the work of Voordouw et al (2010) where platinum mineral assemblages were grouped based on ore mineralogy and trace elements.…”

Section: Introductionmentioning

confidence: 99%

Mineralogy and texture of the Storforshei iron formation, and their effect on grindability

Tøgersen

Kleiv

Ellefmo

et al. 2018

Minerals Engineering

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Investigating how ore mineralogy and texture affect the recovery from the processing plant is important for any mining operation. The results will assist in production planning and optimising the utilisation of a deposit. Easily available validated tests are desirable and useful.The Storforshei iron formation (IF) consists of several iron oxide deposits with mineralogical and textural differences. Although the Fe grades of the ores are similar, mineralogical and textural characteristics of the deposits affect the individual recoveries from the magnetic separation. For this paper three of the ore deposits were sampled, and important mineralogical and textural properties were investigated and tested. The investigations included geological mapping and optical microscopy, and the test work involved surface hardness measurements by Schmidt hammer and Equotip, and autogenous milling tests (i.e., grindability). The aim of the study was to investigate whether ore mineralogy and textures can be correlated to surface hardness measurements, and whether these three parameters can be used to evaluate grindability. The ores were classified into six ore types based on mineralogy and textures. The results show that the ore mineralogy and texture influence the surface hardness. Fine-grained ore types with irregular-to-no visible grain boundaries have higher surface hardness than coarser-grained ore types with straight grain boundaries. Furthermore, surface hardness measurements and grindability evaluations (using throughput (kg/h) and specific energy consumption (kWh/tonne)) of samples from three of the iron oxide deposits indicate that grindability decreases with increasing surface hardness. The relationship found between the parameters ore mineralogy, texture, surface hardness, and grindability suggests that geological mapping and surface hardness measurements can be used to evaluate grindability, and thus assess ore processing performance.

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“…Other alternative modified Bond test procedures were tried to solve the problem of fine limiting sizes of feed [16][17][18][19], the size of sample [20][21] and grinding crystalline grains [22]. Attempts were made to predict the Bond's work index using samples rock properties such as density, Protodyakonov's strength index, and rebound hardness number (Viker's hardness) [23][24].…”

Section: Introductionmentioning

confidence: 99%

“Dependence of the Bond Work Index on the Filling Ratio and Test Sieve Aperture”.

rizk

2020

JES. Journal of Engineering Sciences

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Comminution test method using small drill core samples

Cited by 18 publications

References 18 publications

Comparative laboratory study of conventional and Electric Pulse Fragmentation (EPF) technologies on the performances of the comminution and concentration steps for the beneficiation of a scheelite skarn ore

Comparative laboratory study of conventional and Electric Pulse Fragmentation (EPF) technologies on the performances of the comminution and concentration steps for the beneficiation of a scheelite skarn ore

Mineralogy and texture of the Storforshei iron formation, and their effect on grindability

“Dependence of the Bond Work Index on the Filling Ratio and Test Sieve Aperture”.

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