哈尔滨铸管厂铁水熔化的原料为煤气焦和废钢屑重熔铁锭,根据这个条件于1982年5月,设计制造熔化率为4吨/小时的两排组中间距热风冲天炉。经过三年来的生产实践证明,此炉熔化的铁水温度高、焦炭消耗少、铁水的氧化烧损低,技术指标达到了先进水平,经济效益显著。 According to this condition, in May 1982, two sets of middle-distance hot-air cupola furnaces with a melting rate of 4 tons / hour were designed and manufactured according to the raw materials for melting molten iron in Harbin Pipe Factory. After three years of production practice has proved that the melting temperature of hot metal stove, coke consumption less hot metal oxide burning loss, the technical indicators have reached the advanced level, significant economic benefits.