Determination of lifter design, speed and filling effects in AG mills by 3D DEM

Djordjević, N.; Shi, Fengnian; Morrison, Rob

doi:10.1016/j.mineng.2004.06.033

Cited by 49 publications

(17 citation statements)

References 4 publications

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“…DEM simulations of the impact energy distribution pattern in an AG mill operation have revealed that small energy impacts take place at a much higher frequency than high energy impacts (Djordjevic et al, 2004). The broken particles in the mill may result from receiving a single impact of high energy, or multiple impacts of low energies.…”

Section: Low Energy Incremental Breakagementioning

confidence: 99%

A review of the applications of the JK size-dependent breakage model

Shi

2016

International Journal of Mineral Processing

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It has been 10 years since the JK size-dependent breakage model was developed (Shi and Kojovic, 2007). This paper reviews 20 applications of the model for the mineral and coal industries in the past 10 years to encourage its use in future applications. The review is divided into three parts: Part 1 for ore and coal breakage characterisation, Part 2 for assessment of material strength and energy requirement for size reduction, and Part 3 for modelling comminution equipment. Part 1 of the review covers the model structure, its applications in high energy single impact data reduction, low energy incremental breakage modelling, reduced breakage testing method, a new impact breakage testing method using mixed particles in a wide size range, fine particle breakage characterisation (JKFBC), and a multi-component breakage model for coal grinding. It has been proved through these applications that the JK size-dependent breakage model is a useful tool for ore and coal breakage characterisation.

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Section: Low Energy Incremental Breakagementioning

confidence: 99%

A review of the applications of the JK size-dependent breakage model

Shi

2016

International Journal of Mineral Processing

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“…With regards to lifters, Santomaso et al (2003) proposed future study on systems that include them. In fact, some studies have shown that lifter design affects particle packing (Djordjevic et al, 2004).…”

Section: Resultsmentioning

confidence: 99%

Characterising porosity of multi-component mixtures in rotary mills

Sichalwe¹,

Govender²,

Mainza³

2011

Minerals Engineering

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“…The results showed that increasing the lifter height and number of lifters results in larger impact forces. Djordjevic et al [ 25 ] used the Particle Flow Code 3D (PFC3D) to model the effect of lifter number, height and mill speed on net power draw, concluding that the net power draw decreases as the lifter height increases. Controlling parameters, such as mill speed and mill filling, have been investigated to determine a suitable parameter combination that requires higher grinding efficiency.…”

Section: Introductionmentioning

confidence: 99%

Impact Load Behavior between Different Charge and Lifter in a Laboratory-Scale Mill

et al. 2017

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The impact behavior between the charge and lifter has significant effect to address the mill processing, and is affected by various factors including mill speed, mill filling, lifter height and media shape. To investigate the multi-body impact load behavior, a series of experiments and Discrete Element Method (DEM) simulations were performed on a laboratory-scale mill, in order to improve the grinding efficiency and prolong the life of the lifter. DEM simulation hitherto has been extensively applied as a leading tool to describe diverse issues in granular processes. The research results shown as follows: The semi-empirical power draw of Bond model in this paper does not apply very satisfactorily for the ball mills, while the power draw determined by DEM simulation show a good approximation for the measured power draw. Besides, the impact force on the lifter was affected by mill speed, grinding media filling, lifter height and iron ore particle. The maximum percent of the impact force between 600 and 1400 N is at 70–80% of critical speed. The impact force can be only above 1400 N at the grinding media filling of 20%, and the maximum percent of impact force between 200 and 1400 N is obtained at the grinding media filling of 20%. The percent of impact force ranging from 0 to 200 N decreases with the increase of lifter height. However, this perfect will increase above 200 N. The impact force will decrease when the iron ore particles are added. Additionally, for the 80% of critical speed, the measured power draw has a maximum value. Increasing the grinding media filling increases the power draw and increasing the lifter height does not lead to any variation in power draw.

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Determination of lifter design, speed and filling effects in AG mills by 3D DEM

Cited by 49 publications

References 4 publications

A review of the applications of the JK size-dependent breakage model

A review of the applications of the JK size-dependent breakage model

Characterising porosity of multi-component mixtures in rotary mills

Impact Load Behavior between Different Charge and Lifter in a Laboratory-Scale Mill

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