Numerical simulation of influence of oxygen and hydrogen enrichment on smelting characteristics inside blast furnace
As an important ironmaking process,blast furnace ironmaking occupies a dominant position in China and globally.In response to the goal of"Dual Carbon",reducing carbon dioxide emissions in blast furnace ironmaking has become one of the important issues of concern for the industry and society.Oxygen enrichment and pulverized coal injection(PCI)in blast furnace and co-injection of pulverized coal with pure hydrogen can effectively reduce carbon dioxide emissions,but their impact on the smelting characteristics inside the blast furnace is not clear at present.Therefore,this study establishes a three-dimensional blast furnace model considering gas-solid two-phase flow and verifies the accuracy of the model using production data.The influence of oxygen enrichment rate and hydrogen injection amount on temperature field,concentration field,and gas utilization rate is studied using this model.The results show that the temperature in the high-temperature zone of the furnace increases with the increase of oxygen enrichment rate and decreases with the increase of hydrogen injection amount.Increasing the oxygen enrichment rate will greatly reduce the CO utilization rate.When the oxygen enrichment rate is 7.5%(base model)and 15.0%,the CO utilization rate is 48.88%and 41.43%.With the increase of hydrogen injection amount,the utilization rate of hydrogen is greatly reduced.When the hydrogen injection amount is 0(base model)and 60 m3/t,the CO utilization rate is 60.44%and 54.08%.
万方数据
维普
