Particle stratification and penetration of a linear vibrating screen by the discrete element method

Xiao, Jianzhang; Tong, Xin

doi:10.1016/j.ijmst.2012.04.013

Cited by 49 publications

(20 citation statements)

References 12 publications

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“…A change in the angular inclination of deck motion produces a change in separation efficiency; for example, there are cases where the efficiency is 86% at design operating conditions and for a change of 2 ∘ in angle the separation efficiency drops to 55% [2,3]. Xiao and Tong [4] show a drop of separation efficiency from 55% to 35% with a change of only 1 ∘ . The exact loss of efficiency due to amplitude or inclination deviation depends on the specific vibrating screen and the ore material characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…Models of vibrating screens in literature are focused on separation [4][5][6][7][8][9][10], particles motion [11,12], and failures in deck structure [13,14]. Regarding vibrating screen motion, He and Liu [15] developed a three-degree-of-freedom linear model of a vibrating screen supported at two positions with equal stiffness for a circular motion vibrating screen.…”

Section: Introductionmentioning

confidence: 99%

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Nonlinear Model of Vibrating Screen to Determine Permissible Spring Deterioration for Proper Separation

Rodríguez

Moncada

Dufeu

et al. 2016

Shock and Vibration

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Springs of vibrating screens are prone to fatigue induced failure because they operate in a heavy duty environment, with abrasive dust and under heavy cyclic loads. If a spring breaks, the stiffness at supporting positions changes, and therefore the amplitude of motion and the static and dynamic angular inclination of deck motion also change. This change in the amplitude and in the inclination of motion produces a reduction in separation efficiency. Available models are useful to determine motion under nominal operating conditions when angular displacement is not significant. However in practice there is significant angular motion during startup, during shutdown, or under off-design operating conditions. In this article, a two-dimensional three-degree-of-freedom nonlinear model that considers significant angular motion and damping is developed. The proposed model allows the prediction of vibrating screen behavior when there is a reduction in spring stiffness. Making use of this model for an actual vibrating screen in operation in industry has permitted determining a limit for spring’s failure before separation efficiency is affected. This information is of practical value for operation and maintenance staff helping to determine whether or not it is necessary to change springs, and hence optimizing stoppage time.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nonlinear Model of Vibrating Screen to Determine Permissible Spring Deterioration for Proper Separation

Rodríguez

Moncada

Dufeu

et al. 2016

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…[2]. Therefore, discrete element method (DEM) has become an important and effective method to study the screening process [3,4]. At present, research on vibration screening process mainly focuses on linear vibration and circular vibration, and there are relatively few studies on the elliptical vibration screening process.…”

Section: Introductionmentioning

confidence: 99%

DEM simulation and experimental study on the screening process of elliptical vibration mechanical systems

Chen

Yan

et al. 2019

J. vibroeng.

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For an elliptical vibration system, the vibration parameters seriously affect conveying speed and sieving efficiency of the materials. In addition, considering the lack of studies about the elliptical vibration machine, we applied the discrete element method to simulate and analyze the elliptical vibration screening process in this paper. A vibration screening model is particularly based on the purpose of our research to fundamentally demonstrate the novel relationships among the conveying speed, sieving efficiency and vibration parameters of the materials. And the sieving experiment of typical materials is additionally carried out on the same simulation system. This paper analyzes the influence rule of vibration parameters on conveying speed and sieving efficiency of the materials during the elliptical vibration screening process by virtue of comprehensively comparing the results of experimental study coupled with simulation research. Consequently, we can throw up the optimal vibration screening parameters to guarantee high sieving efficiency and large throughput of the screening machine at the same time. The screening test carried out in this paper lays the experimental foundation for the study of the mechanism of elliptical vibration screening machine and the study of materials screening characteristics by combining the conclusions of DEM simulation analysis of lots of materials. It provides not only a basis for selecting the vibration parameters of the actual working process of the screening machine, but also data support based on the experiment and simulation for the study of the sieving mechanism of elliptical vibration systems. For screening mechanism, this is a significant progress which will affect future design and manufacture of elliptical vibration machines. Furthermore, the conclusions drawn from this research can help us study and explain better the screening process of other vibration machinery.

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“…Cleary and Sawley [8] adopted DEM to capture spherical particles on an inclined flat sieve. Besides, simulation of particle stratification and penetration of a linear vibrating screen has been performed to analyze the influence of a range of structural parameters [9]. Also, DEM played a crucial role in researches on mineral screening and crop cleaning [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Vibration Parameter Optimization of a Linear Vibrating Banana Screen Using DEM 3D Simulation

Xia

et al. 2018

J. Eng. Technol. Sci.

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In this paper, the effects of vibration parameters of a banana screen, i.e. frequency, amplitude and vibration direction angle, on the screening efficiency per unit time were studied using the discrete element method (DEM). The simulations were validated according to data collected from an experimental prototype screen. Functional relationships between vibration parameters and screening efficiency per unit time are presented. The results showed that the screening efficiency per unit time first displays an increase and later a decrease when the frequency, amplitude or vibration direction angle increased respectively. Vibration parameter optimization was also investigated, using an orthogonal experiment. Based on the banana screen model, it can be concluded that when the frequency is 22 Hz, the amplitude is 2.2 mm and the vibration direction angle is 39°, the screening efficiency of a banana screen is optimal.

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Particle stratification and penetration of a linear vibrating screen by the discrete element method

Cited by 49 publications

References 12 publications

Nonlinear Model of Vibrating Screen to Determine Permissible Spring Deterioration for Proper Separation

Nonlinear Model of Vibrating Screen to Determine Permissible Spring Deterioration for Proper Separation

DEM simulation and experimental study on the screening process of elliptical vibration mechanical systems

Vibration Parameter Optimization of a Linear Vibrating Banana Screen Using DEM 3D Simulation

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