日本川崎钢铁公司千叶钢铁厂于最近采用了一种用底砍转炉对铁水进行预处理的方法。其具体工艺过程为:将铁水装入转炉后,以氧气作运载气体,将脱磷用的生石灰粉从转炉的炉底喷射到炉内铁水中。生石灰粉的单耗为每吨铁水20kg,运载气体氧气的单耗为、每吨铁水水6Nm~3。在从转炉炉底向炉内喷射生石灰粉的同时,从转炉 Chiba Mills, Japan’s Kawasaki Steel, recently adopted a method of pre-treating molten iron at the end of its cut-off converter. The specific process is as follows: After the molten iron is charged into the converter, oxygen is used as the carrier gas, and the quick lime powder for dephosphorization is injected from the bottom of the converter into the molten iron in the furnace. The unit consumption of lime powder is 20kg per ton of molten iron, and the unit consumption of carrier gas is 6Nm ~ 3 per ton of molten iron. From the bottom of the converter into the furnace blasting lime at the same time, from the converter