Static model of shaft furnaces with oxygen injection based on chemical energy maximized utilization

In consideration of such problems as low gas utilization ratio, large gas consumption and high carbon dioxide emissions, a method was proposed by designing a new shaft furnace with oxygen injection into the upper zone. Based on the mass and energy balances of gas and solid phases, a static model of the shaft furnace was developed to simulate the iron-making process in the shaft furnace. Calculating results show that under the typical operation conditions, the gas volume of the shaft furnace with oxygen injection is 1 404. 67 m³, and the oxygen volume is 20. 32 m³ for per ton of direct reduction iron. In comparison with a traditional shaft furnace, the reduction potential of top gas decreases to 0. 56, the carbon emission decreases by 26. 25%, and the energy consumption decreases by 19. 56%.