Force characteristic of the large coal particle moving in a dense medium gas–solid fluidized bed

摘要: Abstract Force characteristic of the large coal particle was investigated when it moved in a dense medium gas–solid fluidized bed with 100–300 μm Geldart B magnetite powder as medium. We selected two groups particles equivalent diameters 13 and 25 mm studying objects. The theoretical force calculation model established by analysis. approaches experimental measurement numerical simulation were combined to determine particle. results indicate that forces vary within certain suitable ranges present uniform fluctuations maintains stable fluidization state. spectral analysis method introduced compare simulation. Finally, we obtain conclusion provide good agreements results, which also validates accuracy reliability for