我厂铸工车间广大职工,在毛主席革命路线指引下,高举“鞍钢宪法”大旗,于一九七○年底,在兄弟厂经验的基础上,改革了原2.5吨冷风冲天炉,建成了2.5吨热风冲天炉。三年多来的实践证明,改革后的冲天炉,具有操作方便,耗焦量少,铁水温度高等一系列优点,对提高3马力柴油机铸件质量,降低成本起了很大的作用。一、冲天炉结构(见图) Under the guidance of Chairman Mao’s revolutionary line, the workers and staff of our foundry workshop held the banner of “Ansteel Constitution”. At the end of 1970, based on the experience of Brother Factory, the former 2.5-ton cold cupola was rebuilt and 2.5 Tons hot cupola. More than three years of practice have proved that the reform of the cupola, with easy operation, less power consumption, a series of advantages of hot metal temperature, to improve the quality of 3 hp diesel engine castings, reduce costs played a significant role. A cupola structure (see photo)