Influence of Lump Ore Ratio and Shapes on the Particle Flow Behavior Inside the Direct Reduction Shaft Furnace by Discrete Element Modeling Model. Issue 1 (19th October 2022)

• Record Type: Journal Article
• Authors: Liao, Haotian; Zong, Yanbing; Li, Kejiang; Bu, Yushan; Bi, Zhisheng; Jiang, Chunhe; Liu, Zhengjian; Zhang, Jianliang
• Is Part Of: Steel research international. Volume 94:Issue 1(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-10-19
• Subjects: discrete element modeling -- lump ore ratios -- particle shapes -- shaft furnaces -- void fractions; Steel -- Periodicals; Steel -- Metallurgy -- Periodicals; 669.142
• DOI: 10.1002/srin.202200531
• Languages: English
• ISSNs: 1611-3683

Abstract

Abstract : In recent years, with the attention given to hydrogen reduction‐related technologies, the parameter indicators of direct reduction in the shaft furnace have gained importance. Herein, the numerical simulation of the particle flow field in the shaft furnace is investigated with the help of discrete element method (DEM) model. In contrast to the subregional modeling and the single particle shape study of the previous studies, this study innovatively uses the real shape of the particles and the overall structure of the vertical furnace for modeling. The transient characteristics of solid particle flow under ten lump ore ratios and three shapes are considered. The results show that the mass fraction and the shape of lump ore have little effect on the particle falling speed, but have a significant effect on the particle segregation behavior. In addition, the void ratio responds to the permeability condition in the furnace, which is also influenced by the lump ore proportion and shape. Abstract : The effect of different lump ore ratios and shapes on the performance of shaft furnace is studied by discrete element method (DEM). The mass ratio and shape of the lump ore have little effect on the falling velocity of the particles, but have a significant effect on the particle segregation and the void ratio of the filled bed.