1984 Volume 70 Issue 10 Pages 1362-1369
An analytical procedure was developed for reduction in fluidized beds with batch-wise iron ore feed based on the bubble assemblage model and the three-interface reaction model with solid-state diffusion. The experimental results of hydrogen reduction in the high pressure fluidized bed were analyzed according to the proposed procedure. The simulated results were able to describe the experimental data up to the final stage in which the reduction rate became extremely low. Effects of pressure, temperature, gas velocity, bed height, and fractional reduction on the reduction rate and the utilization factor for hydrogen were elucidated quantitatively by the proposed analytical procedure.