| 摘要 |
<p>PROBLEM TO BE SOLVED: To enhance energy efficiency of a heating furnace and a heat treat furnace.SOLUTION: A method for preheating a heated material leads an exhaust gas emitted after combustion of a fuel gas discharged from the heating furnace or heat treat furnace to a heated material carried into the heating furnace or heat treat furnace and uses the waste heat of the exhaust gas to preheat the heated material.</p> |
