| 摘要 |
An improvement in a method for the batchwise gaseous reduction of metal oxides, e.g., iron ore to metals, e.g., sponge iron, in a multiple unit reactor system of the type in which separate bodies of metal-bearing material are simultaneously treated in one or more charging reactors, reduction reactors and cooling reactors and a reducing gas is passed successively through the cooling and reduction reactors. The reducing gas is recirculated in both the cooling reactor and the reducing reactor to increase the mass flow rate of the gas. By recycling the gas to the reduction reactor acceptable reduction can be achieved in a shorter period of time and with a single reactor. Also the temperature gradient through the bed is reduced thus producing a higher average temperature in the bed for a given inlet temperature and more nearly uniform metallization is obtained. |
