Banana flip-flow screen benefits coal preparation

Gangfeng, Zheng; Zhu, Jinbo; Xia, Wandong; Liu, Shili

doi:10.1016/s0015-1882(16)30170-7

Cited by 27 publications

(5 citation statements)

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“…The application of the flip-flow screen has been widespread. In coal preparation plants, its use has lowered the lower limit of screening classification from 13 mm to 3 mm, achieving the removal of fine-grained particles in the raw coal [1][2][3]. In metal ore production, the lower classification limit of the flip-flow screen provides material with higher grindability for high-pressure roller mills, realizing "more crushing, less grinding", thereby reducing the overall energy consumption of crushing and grinding [4].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Optimization of Screening Process for Vibrating Flip-Flow Screen Based on Discrete Element Method–Finite Element Method–Multi-Body Dynamics Coupling Method

Xu,

Wang,

Lin

et al. 2024

Minerals

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Vibrating flip-flow screens are widely employed in the deep screening processes of coal washing, solid waste treatment, metallurgy, and other fields, playing a crucial role in enhancing product quality and production efficiency. The screen surface and material movement of vibrating flip-flow screens are highly complex, and there is currently insufficient understanding of their screening mechanism, limiting further optimization and application. In this paper, the Discrete Element Method (DEM), Finite Element Method (FEM), and Multi-Body Dynamics (MBD) were integrated to establish a numerical coupling model for vibrating flip-flow screens, considering material loads, screen surface deformation, and screen machine dynamics. The Response Surface Method was utilized to analyze the significant impact of relative amplitude, tension amount, amplitude of driving screen frame, vibration frequency, and screen surface inclination on screening efficiency and material velocity. The results indicate that the most significant factor influencing the screening of flip-flow screens is the screen surface inclination. Based on a BP neural network, a five-degree-of-freedom inclination surrogate model for flip-flow screens was established. The whale algorithm was employed for multi-objective optimization of the surrogate model, resulting in a screen surface inclination distribution that meets the requirements of different operating conditions.

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Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Optimization of Screening Process for Vibrating Flip-Flow Screen Based on Discrete Element Method–Finite Element Method–Multi-Body Dynamics Coupling Method

Xu,

Wang,

Lin

et al. 2024

Minerals

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“…Due to the self-cleaning efficacy facilitated by the repetitive motion of relaxation stretching relaxation of FFSPs, flip-flow screens have gained extensive adoption in the screening process of moist fine materials. This motion pattern generates high acceleration on the surface of the screen plates, effectively addressing the prevalent challenge of hole blocking commonly encountered in industrial screening operations [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Effects of Pre-Stretching Amount on Motion Characteristics and Screening Efficiency of Flip-Flow Screen Plates

Wang,

Geng,

et al. 2024

Minerals

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This study systematically investigates the impact of pre-stretching amount (PSA) on the acceleration, motion status, and screening efficiency of the Flip-flow screen plate (FFSP). Initially, a nonlinear spring-multi-body model of the FFSP is established. Subsequently, the acceleration signals at the midpoint of the FFSP under various PSAs are measured and analyzed. The nonlinear stiffness coefficient of FFSP along the vertical direction is then determined and it is found that simplifying the nonlinear spring-multi-body system to a nonlinear spring-tri-body system under the experimental conditions can maintain the calculation error of FFSP’s acceleration within 30%. Phase and Poincaré mapping diagrams of the FFSP under different PSAs are subsequently created to illustrate the impact of PSA on the motion status of the FFSP. Finally, screening experiments are performed to study the optimal PSA for a kind of bituminous coal from Shanxi province.

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“…However, conventional screening equipment (linear vibrating or circular vibrating screens) frequently encounters the problem of rapid blockage of screen apertures, which reduces the screening efficiency and increases the labor intensity of workers [6]- [8]. The main and floating screen frames of vibrating flip-flow screens (VFFSs) generate relative movement along the screen surface under the exciter's simple harmonic excitation [9]- [11]. This relative movement causes flip-flow screen panels (FFSPs), which are mounted on the beams of main and floating screen frames, to perform periodic slack and stretch motions.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Model of Vibrating Flip-Flow Screens That Considers the Effects of Screen Panels

Lin

et al. 2022

IEEE Access

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Vibrating flip-flow screens have been widely used in the mineral processing industry. As the key components, flip-flow screen panels strongly affect the dynamics of vibrating flip-flow screens. However, there is no systematic research into this problem. In this study, the dynamic characteristics of flip-flow screen panel are identified by the finite element analysis. Furthermore, a nonlinear coupling dynamic model of vibrating flip-flow screens that considers the effects of flip-flow screen panels is proposed, and the analytical and numerical solutions of its governing equation are deduced via the equivalent linearization method and the time marching method. Also, experimental results show that the proposed model describes the movements of vibrating flip-flow screens more accurately than the classical mechanical model which does not consider flip-flow screen panels. Finally, the effects of the screen panel's parameters, such as the slack length and the stiffness, on the dynamics of vibrating flip-flow screens are investigated.

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Banana flip-flow screen benefits coal preparation

Cited by 27 publications

References 0 publications

Numerical Simulation and Optimization of Screening Process for Vibrating Flip-Flow Screen Based on Discrete Element Method–Finite Element Method–Multi-Body Dynamics Coupling Method

Numerical Simulation and Optimization of Screening Process for Vibrating Flip-Flow Screen Based on Discrete Element Method–Finite Element Method–Multi-Body Dynamics Coupling Method

Effects of Pre-Stretching Amount on Motion Characteristics and Screening Efficiency of Flip-Flow Screen Plates

Nonlinear Model of Vibrating Flip-Flow Screens That Considers the Effects of Screen Panels

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