The mechanism of the iron ore with the anthracite in the fluidized-mixed bed was studied. The experimental data were compared with the theoretical equation based on the steps, such as the diffusion through the gaseous film around the ore particles, the intraparticles diffusion, and the surface chemical reaction.
The reaction of reduction with the solid carbon and the carbon monoxide were simultaneously occured in the fluidized-mixed bed and the latter was predominated. The experimental results of the direct reduction are in good agreement with the McKewan's equation which was deduced from the results of reducing iron ore in hydrogen stream.
The cohesion phenomenon which frequently obstructed the industrial manufacturing process of the sponge iron could be interpreted from the effect of the exisence of the ferrous oxide; however, this phenomenon could be prevented by applying the fluidized-mixed bed which was diluted with the packing materials, such as fire-brick and sand.