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概要介绍了热风炉的特点，分析了热风炉采用烟气再循环对炉膛进行降温防止结渣与采用冷风进行降温的经济性．
The characteristics of the hot blast stove are introduced in brief. The economy of the hot blast stove using the flue gas recirculation to cool down the furnace and prevent the slagging and cooling with the cool air is analyzed.