Kinematic characteristics of key structures and time evolution law of material distribution characteristics during flip-flow screening

Wang, Weinan; Hou, Xu; Mao, Pengfei; Pan, Miao; Yu, Shijie; Hua, Jiang; Qiao, Jinpeng; Chen, Duan

doi:10.1016/j.mineng.2023.108241

Cited by 6 publications

(3 citation statements)

References 28 publications

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“…To simplify the calculations, the nonlinear spring-multi-body model is simplified to the nonlinear spring-tri-body model shown in Figure 13, where mass block m 3 represents the end of the screen plate connected to the fixed rod, and mass block m 1 represents the end of the screen plate connected to the moving beam. Given that the motion perpendicular to the FFSP's midpoint during the screening process is significantly greater than the motion in other directions [37], this study disregards the motion of the screen plate in the remaining directions. Thus, the formula x 2 (t) = x 2 (0) can be obtained.…”

Section: Nonlinear Spring-tri-body Modelmentioning

confidence: 99%

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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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Section: Nonlinear Spring-tri-body Modelmentioning

confidence: 99%

“…By adjusting the PSA of the screen plate, the acceleration of the screen plate can be changed across a wide range, providing a convenient way to optimize screening efficiency [36][37][38]. This method can be achieved without modifying the main body of the flip-flow screen and does not limited by the stability of the screen frames.…”

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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“…These challenges significantly impede the progress of the thermal coal preparation process [9,10]. To address these issues, flip-flow vibrating screens (FFVSs) have emerged as innovative screening equipment, combining features of the crank-link-type flip-flow screen and the traditional vibrating screen [11,12]. These FFVSs not only inherit the high ejection intensity and self-cleaning ability of the crank-link-type flip-flow screens but also incorporate the simplicity and high reliability associated with traditional linear and circular vibration screens [13,14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Screen-Panel Tensile Length and Material Characteristics on Screening Performance of Flip-Flow Vibrating Screens for Dry-Screening Fine, Low-Grade Bituminous Coal

Lin,

Zhang,

et al. 2024

Minerals

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Flip-flow vibrating screens (FFVSs) effectively tackle the challenges posed by the dry deep-screening of wet, fine, low-grade bituminous coal, thereby facilitating advancements in the thermal coal preparation process. The tensile lengths of the screen panels not only influence the service lives of the screen panels but also play a pivotal role in determining the screening performance of the FFVSs. To investigate the effect of the screen-panel tensile length on the screening performance of an FFVS, this study constructs a dual-mass flip-flow screening test rig. The experimental results reveal that when the fine-particle content and the external water content in the feed of low-grade bituminous coal are 55% and 16%, respectively, the most favorable tensile length of the screen panels is 2 mm. With a fine-particle content of 55% in the feed of low-grade bituminous coal and an increase in the external water content from 4% to 20%, the screening efficiency of the FFVS initially decreases and then increases. Notably, low-grade bituminous coal with 16% external water content poses the most challenging screening conditions. Furthermore, when the external water content of the low-grade bituminous coal is 16% and the fine-particle content in the feed increases from 25% to 55%, the screening efficiency of the FFVS gradually improves.

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Optimization of flip-flow screen plate based on DEM-FEM coupling model and screening performance of fine minerals

Hou,

Wang,

Pan

et al. 2024

Minerals Engineering

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Kinematic characteristics of key structures and time evolution law of material distribution characteristics during flip-flow screening

Cited by 6 publications

References 28 publications

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

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

Effect of Screen-Panel Tensile Length and Material Characteristics on Screening Performance of Flip-Flow Vibrating Screens for Dry-Screening Fine, Low-Grade Bituminous Coal

Optimization of flip-flow screen plate based on DEM-FEM coupling model and screening performance of fine minerals

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