The applications of rock mechanics parameters to the prediction of comminution behaviour

Bearman, R.A.; Briggs, C.A.; Kojovic, T.

doi:10.1016/s0892-6875(97)00002-2

Cited by 54 publications

(24 citation statements)

References 2 publications

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“…It has been shown that the mechanical parameters of rock samples can be used to describe and model comminution processes in the case of crushing [11][12][13]. For this purpose, mechanical strength, expressed by the maximum load at the point of failure, needs to be transformed into quantities that can be used within the design of crushing stages, e.g., by linking the crusher reduction ratio or crushability index (CI) with compressive strength or impact strength index (ISI).…”

Section: Load Cellmentioning

confidence: 99%

“…The test sample can comprise single particles, partial or complete drill core section or several coarser particles obtained from pre-crushing. Several test apparati have been conceived [11,17,18], with the JK drop weight test being the most well-known. In order to conduct particle bed fracture tests with finer particles, the anvil is replaced by a die [19].…”

Section: Load Cellmentioning

confidence: 99%

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Testing of Ore Comminution Behavior in the Geometallurgical Context—A Review

2015

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Abstract:Comminution tests are an important element in the proper design of ore beneficiation plants. In the past, test work has been conducted for particular representative reference samples. Within geometallurgy the entire ore body is explored in order to further identify the variation within the resource and to establish spatial geometallurgical domains that show the differential response to mineral processing. Setting up a geometallurgical program for an ore deposit requires extensive test work. Methods for testing the comminution behavior must therefore be more efficient in terms of time and cost but also with respect to sample requirements. The integration of the test method into the geometallurgical modeling framework is also important. This paper provides an overview of standard comminution test methods used for the investigation of ore comminution behavior and evaluates their applicability and potential in the geometallurgical context. Keywords: geometallurgy; comminution behavior; metallurgical testing BackgroundBefore concentration, metal ores have to be crushed and ground in order for the metal bearing minerals to be liberated. Sufficient size reduction by comminution is not only a prerequisite for any downstream physical separation, but is also the processing step within mineral processing that has the highest energy demand, and which, in practice, is often the limiting factor for plant capacity. Reliable OPEN ACCESS

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Section: Load Cellmentioning

confidence: 99%

Section: Load Cellmentioning

confidence: 99%

Testing of Ore Comminution Behavior in the Geometallurgical Context—A Review

2015

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“…Also present as accessory minerals are chlorite and tourmaline, with chlorite being produced by alteration of biotite mica. Examination of crystal size reveals a ground mass of 2 to 3 mm crystals with phenocrysts of plagioclase feldspar reaching 9 mm in length [26].…”

Section: The Drop Weight Testmentioning

confidence: 99%

Numerical simulation of the dynamic impact breakage testing of rock

Reddish

Stace

Vanichkobchinda

et al. 2005

International Journal of Rock Mechanics and Mining Sciences

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“…A common focus in comminution analysis is the segmentation of the resulting particulate matter and the creation of an optimal size distribution for the next stage of processing (Bearman et al, 1997;Fandrich et al, 1998;Jemwa and Aldrich, 2012;Mwanga et al, 2015;Noy, 2013;Sanchidrián et al, 2008;Zhang and Zhao, 2013). Active stereo photogrammetric and laser scanning systems have been successfully used to automate the process of estimating particle size distributions of ore piles travelling on a conveyor belt.…”

Section: Introductionmentioning

confidence: 99%

High Speed Videometric Monitoring of Rock Breakage

Allemand

Shortis

Elmouttie

2018

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

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Estimation of rock breakage characteristics plays an important role in optimising various industrial and mining processes used for rock comminution. Although little research has been undertaken into 3D photogrammetric measurement of the progeny kinematics, there is promising potential to improve the efficacy of rock breakage characterisation. In this study, the observation of progeny kinematics was conducted using a high speed, stereo videometric system based on laboratory experiments with a drop weight impact testing system. By manually tracking individual progeny through the captured video sequences, observed progeny coordinates can be used to determine 3D trajectories and velocities, supporting the idea that high speed video can be used for rock breakage characterisation purposes. An analysis of the results showed that the high speed videometric system successfully observed progeny trajectories and showed clear projection of the progeny away from the impact location. Velocities of the progeny could also be determined based on the trajectories and the video frame rate. These results were obtained despite the limitations of the photogrammetric system and experiment processes observed in this study. Accordingly there is sufficient evidence to conclude that high speed videometric systems are capable of observing progeny kinematics from drop weight impact tests. With further optimisation of the systems and processes used, there is potential for improving the efficacy of rock breakage characterisation from measurements with high speed videometric systems.

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The applications of rock mechanics parameters to the prediction of comminution behaviour

Cited by 54 publications

References 2 publications

Testing of Ore Comminution Behavior in the Geometallurgical Context—A Review

Testing of Ore Comminution Behavior in the Geometallurgical Context—A Review

Numerical simulation of the dynamic impact breakage testing of rock

High Speed Videometric Monitoring of Rock Breakage

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