通过热模拟试验研究了ＣＯＲＥＸ竖炉气体利用率与还原条件的关系及工业竖炉可达到的气体利用率极限．研究了熔炼煤耗与还原参数的内在联系及达到最低能耗的优化条件．结果表明，竖炉气体利用率受热力学和动力学混合控制，最高值约为５０％左右．全流程最低能耗与熔炼煤性质有关．使用发热值为２９ｋＪｇ－１的２号熔炼煤时，最低煤耗为６２４ｋｇ，净能耗为２．０５４×１０７Ｊ． The relationship between gas utilization and reduction conditions of COREX shaft furnace and the limit of gas utilization achievable by industrial shaft furnace were studied by thermal simulation test. The intrinsic relations between the coal consumption and the reduction parameters and the optimal conditions to achieve the lowest energy consumption were studied. The results show that the shaft furnace gas utilization by thermodynamics and kinetics mixed control, the highest value of about 50%. The lowest energy consumption of the entire process is related to the nature of the smelting coal. When using No. 2 smelting coal with heating value of 29kJg-1, the minimum coal consumption is 624kg, and the net energy consumption is 2.054 × 107J.