Application of screening using a flip-flow screen and shallow groove dense-medium separation in a steam coal preparation plant

Chen, Zengqiang; Huang, Long; Hua, Jiang; Zhao, Yuemin; Liu, Chusheng; Chen, Duan; Zhang, Bo; Yang, Guangrong; Chai, Jin; Ban, Haijun; Yu, Shijie; Wu, Jida

doi:10.1080/19392699.2020.1855581

Cited by 18 publications

(5 citation statements)

References 14 publications

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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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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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“…Coal reliably guarantees our life and economic development. 1 − 3 In 2020, the annual total energy consumption in China exceeded 4.98 × 10 9 tons of standard coal equivalent. In this regard, coal alone accounts for 56.8% of China’s total energy consumption with an annual increase of 1.4%.…”

Section: Introductionmentioning

confidence: 99%

“…China’s coal reserves are estimated at more than 5.9 trillion tons. Coal reliably guarantees our life and economic development. − In 2020, the annual total energy consumption in China exceeded 4.98 × 10 9 tons of standard coal equivalent. In this regard, coal alone accounts for 56.8% of China’s total energy consumption with an annual increase of 1.4%. − China’s energy consumption structure is characterized by more coal, less oil, and poor gas.…”

Section: Introductionmentioning

confidence: 99%

Research of the Collision Mechanics Model and Time-Frequency Characteristics during the Multistage Variable-Inclination Screening Process for Clean Coal

Huang

Liu

et al. 2022

ACS Omega

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Equal-thickness screening is a critical part of mineral processing; recently, the multistage variable-inclination equal-thickness screen (MSVIETS) has been utilized in the mining industry across the world. In this work, a model of the collision mechanics between particles and the multistage variable-inclination screen surface was established. The maximum collision force ( F max ) was found to be closely related to amplitude, frequency, screen surface inclination, and number of stages. The time-frequency response characteristics of multistage (3-, 4-, and 5-STAGE) screen surfaces were studied by the vibration test analysis system. The permeation screen distribution law of grain groups on the screen surface was revealed. The obtained results show the best screening performance can be obtained from the 5-STAGE scheme with a screening efficiency of higher than 95% and total mismatch content of less than 2%. The synergistic mechanism between two of the parameters was revealed by Box–Behnken response surface methodology (BBRSM). Then, the correlation between the screening evaluation index and the multiple parameters was obtained, and the significant order of the parameters influencing the screening evaluation index was F t > f > n .

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“…The dynamic response of the flip-flow screen largely affects its screening efficiency and processing capacity and the dynamic response curves were measured and analyzed under different operating conditions [16,17]. Kinematics of the screen boxes and the surface of the flip-flow screen were investigated using acceleration sensor and laser displacement sensor, the results showed that screening experiments obtained excellent screening efficiency [18]. The dynamic characteristics and vibration of a flip-flow screen have been investigated; the results showed that this kind of screen was efficient even dealing with moist fine coal [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Research on dynamic and vibration behaviors of a flip-flow screen with crankshaft-link structure

Li¹,

Liu²,

Zhou³

et al. 2022

J. vibroeng.

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A flip-flow screen with crankshaft-link structure (FFSCLS) is an effective solution for screening of high-water and fine materials due to its good performance. The dynamical characteristics largely affects the screen performance and the processing capacity of the FFSCLS. In this paper, a dynamic model governing the dynamical characteristics of the FFSCLS was proposed. In addition, the motion trajectory and vibration data of the FFSCLS were investigated by vibration experimental technology. The results show that the experiment results can be fully described by the dynamic model whit the maximum deviation was within 6.26 %. Moreover, the mass ratio between outer box and inner box determined the dynamical characteristics of the flip-flow screen, and these parameters should be optimized. This work can provide useful references for efficient operation and optimal design for the flip-flow screen.

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Application of screening using a flip-flow screen and shallow groove dense-medium separation in a steam coal preparation plant

Cited by 18 publications

References 14 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

Research of the Collision Mechanics Model and Time-Frequency Characteristics during the Multistage Variable-Inclination Screening Process for Clean Coal

Research on dynamic and vibration behaviors of a flip-flow screen with crankshaft-link structure

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