Modeling of the combined electromagnetic and electromechanical drive of the screen to increase its efficiency
DOI:
https://doi.org/10.33216/1998-7927-2025-287-1-46-56Keywords:
screen, vibration, parameters, electromagnetic transducer, modelingAbstract
The paper considers the problem of increasing the efficiency of classification of crushed ore particles by size in the process of its beneficiation by using a fine screen with a combined drive for this operation and determining the main regularities of the influence of the screening surface vibration parameters on the main characteristics of the process. A theoretical analysis and computer modeling of the process of fine screening of ore material were performed. The screen, as a classifying technological unit in the process of ore dressing, separates the input crushed product by the size of its particles. The dynamics of both the screening surface and the patterns of movement and interaction of crushed ore particles are considered. When modeling the screening surface of a screen, it is advisable to represent the dynamics of its components as a set of elementary blocks, including elements of elasticity, damping, and mass. The main statistical parameters that describe the characteristics of contact forces and the power chain between ore particles in the process of their screening include the ratio of the components of the power chain and the contact angle.It is proved that the results of the vibration screening process are determined by the relationships between the parameters of the input ore material, transportation speed, screening efficiency, and vibration parameters of the materials. Vibration parameters include the slope of the screen surface, vibration angle, vibration frequency, and vibration amplitude. The screening quality assessment indicators are screening efficiency and ore material transportation rate. The studied dependences of the dynamics of the vibrating screen surface and the particles of the screened ore were used to model the motion of a screen with a combined electromagnetic and electromechanical drive. The motion and interaction of ore particles on the screen are expressed through the branching vectors and orientation of contact forces. Analytical expressions for the relationship between the rate of transportation of ore material and screening efficiency and the angle of vibration of the screening surface have been obtained, which reflect these dependencies with high reliability.
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