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为了更好地执行毛主席勤俭建国,勤俭办企业的方针,使冲天炉余热不余,废气不废,我们将原三节炉改建成了一座开底式中心加料机构、垂直密筋式炉胆、倒花瓶式曲线炉膛的热风冲天炉,其详细结构见图所示。改建后,经多次试验、改进,取得了显著效果。焦铁比由原来1∶6提高到1∶18;铁水温度稳定在1350～1380℃,最高常达1400℃;熔化率由1.3吨/时,提高到1.7～2吨/时。改进前废品率在3～4.97%,改进后下降到2.33%(不稳定)。
In order to better implement Chairman Mao’s principle of diligence and thrift to establish a nation and diligently and thrifty enterprises, the surplus heat from the cupola was not lost and the waste gas was not wasted. We converted the original three-section stove into a bottomed central feeding mechanism, Down vase curve furnace hot air cupola, the detailed structure shown in the figure. After renovation, after many tests, improvements, and achieved remarkable results. The iron-iron ratio is increased from 1:6 to 1:18; the temperature of the molten iron is stable at 1350-1380 ° C and the highest is 1400 ° C .; the melting rate is increased from 1.3 tons / hour to 1.7-2 tons / hour. Before the improvement, the rejection rate was between 3 and 4.97%, after the improvement, it dropped to 2.33% (unstable).