我厂铸工车间原来的化铁炉是φ400毫米的三节炉,熔化率1吨/时,焦铁比1∶6,效率低,焦耗大,不适应生产发展的要求。我们学习了外地兄弟单位的先进经验,结合本厂实际情况,从1968年至1970年,经过两次较大的改革之后,熔化率先由1吨/时提高到1.5吨/时,后又提高到1.8～2.0吨/时;焦铁比先由1∶6提高到1∶10,后又提高到1∶13.4;铁水温度为1360～1400℃,浇注了重达2吨的大件,也浇成了0.4公斤的小件,至今生产M131W型磨床和B665型牛头刨床身,质量一直较稳定。在迎接党的“十大”召开的日子里,在批林整风运动的推动下,在厂党委和车间支部的 The original iron furnace of our foundry workshop is a three-section furnace of φ400 mm with a melting rate of 1 ton / h and a coke-iron ratio of 1: 6. The efficiency is low and the coke consumption is large, which is not suitable for the requirements of production and development. We learned from the advanced experience of our brothers and field units. Based on our actual situation, from 1968 to 1970, after two major reforms, the melting rate increased from 1 tonne / hour to 1.5 tonne / hour and then to 1.8-2.0 t / h; the ratio of iron to iron increases from 1:6 to 1:10 and then to 1:13.4; the hot metal temperature ranges from 1360 to 1400 ° C, pouring large pieces weighing 2 tons into 0.4 kg small pieces, so far produced M131W grinder and B665 shaper, the quality has been more stable. In meeting the party’s “Top Ten” held on the day, in the campaign to promote forestry rectification campaign, the factory party committee and plant branch