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日本川崎钢铁公司千叶钢铁厂最近采用了一种用底吹转炉对铁水进行预处理的方法。其具体工艺为:将铁水装入转炉中后,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6Nm~3。在从转炉炉底向炉内喷射生石灰粉的同时,从转炉的炉口向炉内添加铁矿石和萤石,铁矿石的单耗为28kg/t 铁,萤石的单耗为每吨
Kawasaki Steel’s Chiba plant recently adopted a method of pretreatment of hot metal at the bottom blown converter. The specific process is as follows: after the molten iron is loaded 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 raw lime powder is 20kg per ton of molten iron, and the unit consumption of carrying gas is 6Nm ~ 3 per ton of molten iron. While injecting quick lime powder from the bottom of the converter into the furnace, iron ore and fluorite are added into the furnace from the furnace mouth of the converter. The consumption of iron ore is 28 kg / t of iron, and the unit consumption of fluorite is