Excessive pig iron is usually charged in converter in order to increase steel output at middle and small steel plants 摘要中小转炉钢厂为了增加钢产量，往转炉内过量加入生铁块。
After modification , main technologica and economic indexes have been improved and sequence casting has been realized , finished products of plain carbon and low - alloy grades through secondary annealing eliminated and billet hot delivery and charging primarily realized , which develops the modification of slab ccm at xinyu iron & steel co . ltd 改造后,方坯连铸机主要技术经济指标得到了提高,并实现了转炉钢全连铸,消灭了普钢、低合金钢二火线材;消灭了二次化铁;初步实现了方坯热装热送;引发了新钢公司板坯机改造。
