轧钢用均热炉、加热炉和热处理炉等的余热利用可节约35％的燃料。轧钢用炉的余热利用可能获得三方面的经济效益:降低产品成本,增加生产能力及采用低热值燃料。轧钢用炉的换热器一般用来将废气热量传递给助燃空气,有时也采用所余的废气能量对燃料进行预热。假若废气热量转变为燃料热量并占较大的比例,对燃料进行预热则是经济可 Rolling with soaking furnaces, furnaces and heat treatment furnaces and other waste heat utilization can save 35% of the fuel. Rolling furnace waste heat utilization may obtain three economic benefits: lower product costs, increase production capacity and the use of low calorific fuel. Rolling furnace heat exchangers are generally used to transfer exhaust heat to the combustion air, and sometimes use the remaining exhaust energy to preheat the fuel. If the flue gas heat is converted to fuel heat and accounts for a large proportion, preheating the fuel is economical