去年我厂铸造车间开始将原三排大风口直筒炉型冲天炉改为两排大间距双层送风冲天炉。自83年11月份以来已经达到了预期效果正式稳定生产。在熔化率为7吨/小时、焦比为1:8的条件下,出炉铁水温度稳定在1450℃以上,平均出炉 Last year, my factory foundry workshop began to change the original three-row gale straight-type furnace cupola into two rows of large-pitch double-deck air cupola. Since November 83, the official production of the expected effect has been reached. In the melting rate of 7 tons / hour, coke ratio of 1: 8 conditions, the hot metal temperature above 1450 ℃ stable, baked out