Abstract:
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 m
3, and the oxygen volume is 20. 32 m
3 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%.
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