Analysis and performance investigation of a reconfigurable vibrating screen machine for mining and mineral processing industries

Ramatsetse, Boitumelo; Mpofu, Khumbulani; Makinde, Olasumbo

doi:10.1016/j.procir.2019.04.180

Cited by 4 publications

(1 citation statement)

References 16 publications

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“…They showed that the stiffness of the screen frame is higher than that of the screen, and the side plats and beams of the screen are the weak parts. Some other investigators have conducted dynamic studies as a qualitative fault diagnosis of the damping springs of vibrating screens (Peng et al, 2014;Peng and Liu, 2015;Ramatsetse et al, 2017Ramatsetse et al, , 2019. The effect of operating parameters, including load amplitude (Michalczyk and Cieplok, 2016;Jiang et al, 2017), feeding conditions (Michalczyk et al, 2017), screen structure (Zhang et al, 2017;Zhou et al, 2019), and vibration characteristics (Xiong et al, 2017) on the sorting performance of vibrating screens have also been examined.…”

Section: Introductionmentioning

confidence: 99%

Dynamic analysis of a dashpots equipped vibrating screen using finite element method

Khoshdast¹,

Khoshdast²,

Jalilifard³

2020

Physicochem. Probl. Miner. Process.

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Even though vibrating screens have been used in mining industries for over a century, their use has often been cited as challenging in terms of understanding its dynamic responses to different operating factors, particularly those that affect the structural aspects. Among the various aspects of screen design, the control of vibrational energies imposed on various parts of the screen is of particular importance because these vibrations directly affect the separation efficiency and useful life of the screen. This study proposes the use of vibration absorbers to control the adverse effects of severe screen vibrations. The dynamic behavior of a medium-sized vibrating screen utilized in the aggregate industry was investigated using the finite element method for both spring/dashpots and conventional solely spring systems. The modeling process was performed in loaded and unloaded conditions and in three frequencies of 15, 23, and 27 rad/s. Numerical simulation results showed that the use of dashpots can significantly reduce the maximum stress in the screen, such that the maximum stress in the center of gravity of the screen at the optimal frequency of 23 decreased from 237 to about 97 MPa. Also, sieve modal analysis showed that the stress in the sieve equipped with the spring/dashpots system had a more uniform distribution. The results revealed that the use of vibration absorbers can be a promising solution to prevent damage caused by high vibrational energies in screens.

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