Abstract
Studies were made on the reduction of iron sands by watergas. The reducing furnace used was a two-stage fluidizing roaster.
The results obtained were as follows:
1. In batch operations, the rate of reduction in fluidized beds was mainly controlled by the gas/ore ratio. The streaming gas velocity had no effect on reduction.
2. The utilization of gas was increased with a decrease of the gas/ore ratio.
3. Continuous operation of this two-stage roaster was very satisfactory.
The heat-input in a reduction bed was only 10% of the latent heat of combustion gas for heating the outside of a reduction bed.
