Mathematical Model of the Shaft Furnace for Reduction of Iron-Ore Pellet

Numerical Analysis of the Characteristics Inside Pre-reduction Shaft Furnace and Its Operation Parameters Optimization by Using a Three-Dimensional Full Scale Mathematical Model

“…Based on above works, the one-dimensional mathematical models of shaft furnace were established and mainly used to predict the gas and solid composition distributions in the axial direction. [8][9][10][11][12][13] The inner characteristic distributions, such as velocity and temperature in the radial direction, were described by introducing the two-dimensional mathematical models. [14][15][16] Furthermore, the development of threedimensional mathematical model is necessary to improve some drawbacks in the previous numerical simulation works of shaft furnace.…”

Reduction Behavior of Packed Bed of Sinter Reduced by CO–CO₂–H₂–H₂O–N₂ Gas

“…Reaction rate constants for the reduction of iron ore in the literature [2][3][4][5][6][7][8][9][10][11][12][13] were used in the present model, and the reaction behavior was analyzed. There are a few experimental results for the reaction rate constant corresponding to the reduction of sintered iron ore by CO/CO 2 gas and H 2 /H 2 O gas under the same conditions.…”

“…In the present study, an unreacted core model with three interfaces 8) was employed for the analyzing the reaction of porous sinter of the packed bed. The R value in the packed bed, gas composition distribution, and its temporal variation were calculated from one-dimensional unsteady differentiation.…”

“…Hara's model 8) was modified by changing the reaction and the reaction rate constant, and a reaction model of the sinter packed bed reduced by CO and H 2 was constructed. Since the grain size of the sintered iron ore was small, gas diffusion in the fine grains was not considered in our calculation.…”

“…2,[6][7][8][9][10][11][12][13] However, there has been no detailed investigation of the individual reduction of Fe 2 O 3 , Fe 3 O 4 , and FeO; rather, the total reduction until iron generation was investigated, and then, the reaction rate constants were derived by parameter fitting. Moreover, there has been no study on the reduction degree in a sinter packed bed.…”