在早先论及的自身预热热风炉操作法的基础上,作者现建议该操作法与废气热回收相结合。仍取早先假设的2000m~3高炉的热风炉组为例。除用回收的废气热预热燃料煤气而进一步提高拱顶温度之外,所有其他前提参数不变。计算表明,采用废气热回收系统可提高风温约50℃和改善热效率约4％。 On the basis of the method of preheating hot stove discussed earlier, the author now suggests that this method should be combined with heat recovery of exhaust gas. Still taking the previously assumed 2000m ~ 3 blast furnace stove group as an example. All other prerequisites remain unchanged except that the recovered exhaust heats up the fuel gas to further raise the vault temperature. Calculations show that the use of exhaust heat recovery system can increase the temperature of about 50 ℃ and improve the thermal efficiency of about 4%.