Effect of outlet characteristics and particle properties on the flow characteristics inside conical hoppersHaotian Liao, Yanbing Zong, Kejiang Li, Zhisheng Bi, Chunhe Jiang, Jianliang Zhang and Shan RenMetall. Res. Technol., 119 5 (2022) 524DOI: https://doi.org/10.1051/metal/2022080