Blast Furnace Performance Under Varying Pellet Proportion

摘要

As a promising method to strengthen the blast furnace smelting and to realize reduced fuel operation, high-proportion pellet charging has become the practice of BF ironmaking. Use of pellet gives rise to uniform bed permeability in comparison with iron ore or sinter. This leads to better gas-solid contact resulting in higher productivity at reduced coke and fuel rate. To achieve the desired gas flow distribution, the burden distribution is changed so that the rollability of pellets is encountered and furnace is maintained in stable condition. This paper discusses the effect of pellet charging proportion on working indices, gas utilization, permeability, fuel rate and production rate of blast furnace. The present work is made to understand the effect of replacing the iron ore proportionately by pellets. An attempt is made to understand the effect of increasing the pellet per cent of the burden charge on the blast furnace process parameters. The results are based on the effect observed in the blast furnace operation.