Journal of Northeastern University(Natural Science) ›› 2021, Vol. 42 ›› Issue (3): 347-352.DOI: 10.12068/j.issn.1005-3026.2021.03.007

• Materials & Metallurgy • Previous Articles     Next Articles

Experiment of Resistance Characteristics for Magnesite Pellets Packed Bed Based on Ergun Equation

ZHANG Sheng, ZHANG Xiao-hu, ZHAO Liang, DONG Hui   

  1. School of Metallurgy, Northeastern University, Shenyang 110819, China.
  • Received:2020-09-06 Revised:2020-09-06 Accepted:2020-09-06 Published:2021-03-12
  • Contact: DONG Hui
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Abstract: The gas flow distribution in the magnesite shaft furnace is relatively complicated. Obtaining the resistance characteristics in the magnesite pellets packed bed is the basis for the research on the gas flow and gas-solid heat transfer process. Starting from the gas dynamics of the gas-solid packed bed, based on the Ergun equation, the key macroscopic properties of the magnesite pellets, including particle size distribution, density, sphericity and voidage, were systematically measured. The viscous resistance coefficient and the inertial resistance coefficient in the Ergun equation were corrected through cold experiments, and a relational equation suitable for describing the resistance characteristics of the magnesite pellet bed was obtained. The results showed that the sphericity and voidage increase with the increase of particle size. The pressure drop increases with the increase of gas flow rate, and the increasing trend gradually intensifies. On the contrary, it decreases with the increase of particle size.

Key words: pressure loss; magnesite pellets; Ergun equation; sphericity; voidage

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