Impact of particle density on the classification efficiency of the static air classifier in Vertical Spindle Mill

• Autorzy: Li Hong , He Yaqun , Yang Jinshan , Zhu Xiangnan , Peng Zhen , Xie Weining

Identyfikatory

DOI

10.5277/ppmp18160

• Języki publikacji: EN

Abstrakty

EN

In order to investigate the impact of density on the classification behavior of particles in the static classifier of Vertical Spindle Mill, the sensitivity of overflow yield to the increase of air amount for narrowly sized pyrite, carborundum, quartz and coal samples were compared in a lab-scale classifier, respectively. Response surface methodology is used to analyze the combined effect of size and density on the classification. Wide size classification was also conducted and results show that both the yield and R90 of overflow increase with the decreasing of density, and the growth of air amount would also lead them to rise. The Whiten’s model was applied to illustrate the influence of density on the sharpness of classification, corrected cut size and fishhook effect. Results show that material with a lower density would have a higher fishhook effect parameter, classification sharpness and corrected cut size. The increase of air amount would result in a more evident fishhook effect for the high density material. Based on the Whiten’s model, a new classification efficiency model with the addition of particle density in various forms was established. This new model could describe the classification efficiency of materials with different density in the identical experiment conditions.

Słowa kluczowe

EN

static air classifier; classification efficiency; material density

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2019
• Tom: Vol. 55, iss. 2
• Strony: 494--503
• Opis fizyczny: Bibliogr. 18 poz., rys., tab.

Twórcy

autor

Li Hong

• School of Environment & Resource, Southwest University of Science & Technology, Mianyang, Sichuan 621010, China
• School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China

autor

He Yaqun

• Advanced Analysis & Computation Center, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China

autor

Yang Jinshan

• School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China

autor

Zhu Xiangnan

• Chemical & Environmental Engineering College, Shandong University of Science & Technology, Qingdao, Shandong, 266590, China

autor

Peng Zhen

• School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China

autor

Xie Weining

• Advanced Analysis & Computation Center, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China

Bibliografia

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• KOJOVIC, T., SHI, F.N., BRENNAN, M., 2015. Modelling of vertical spindle mills. Part 2: Integrated models for E-mill, MPS and CKP mills. Fuel. 143, 602-611.
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• SHI, F.N., KOJOVIC, T., BRENNAN, M., 2015. Modelling of vertical spindle mills. Part 1: Sub-models for comminution and classification. Fuel. 143, 595-601.
• VUTHALURU, H.B., PAREEK, V.K., VUTHALURU, R., 2005. Multiphase flow simulation of a simplified coal pulveriser. Fuel Process. Technol. 86(11), 1195-1205.
• WANG, S., 2013. Particle separation behavior of recirculating load of power station pulverizer in the dilute phase vibrated gas-solid fluidized bed. PhD Thesis. Xuzhou: China University of Mining and Technology.
• WEI, H., HE, Y.Q., SHI, F.N., ZHOU, N.X., WANG, S., GE, L.H., 2014. Breakage and separation mechanism of ZGM coal mill based on parameters optimization model. Inter. J. Min. Sci. Technol. 24(2), 285-289.
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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).