富氧顶吹熔融还原高磷铁矿中磷的行为  

Behaviors of Phosphorus in Smelting Reduction of High-phosphorus Iron Ore by Top-blown Enriched Oxygen

作　　者：魏可[1] 卿山[1] 王华[1] 邓文龙[1] 施哲[1] 

机构地区：[1]昆明理工大学冶金与能源工程学院冶金节能减排教育部工程研究中心,云南昆明650093

出　　处：《过程工程学报》2013年第1期78-82,共5页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:51064015);云南省教育厅重大基金资助项目(编号:ZD2010001)

摘　　要：采用富氧顶吹熔融还原技术冶炼高磷铁矿,研究了熔渣碱度、碳氧比、熔炼温度、通氧(纯度99%)时间及流量对铁浴中磷的影响.结果表明,随温度升高,铁水中磷含量降低,温度过高出现回磷现象;在一定范围内提高碱度、通氧时间和流量,脱磷率提升显著;随碳氧比增大,脱磷率降低;温度1550℃、碳氧摩尔比1.0、碱度1.1、通氧时间10min、氧气流量250L/h条件下,可冶炼出磷含量0.068%的铁水,脱磷率高达92%,所得生铁可用于后期炼钢.The iron-making Process of high-phosphorus iron ore by oxygen top-blown smelting reduction was studied, the effects of slag basicity, molar ratio of carbon to oxygen, smelting temperature, oxygen blowing time （oxygen purity at 99%） and oxygen flow rate on phosphorus distribution in the process were investigated. The results showed that the phosphorus in the molten iron decreased with the increase of temperature. However, excessive temperature led to rephosphorization phenomenon. Dephosphorization rate was enhanced as rising of slag basicity, oxygen-enriched rate and time of oxygen application within a certain range. However, the dephosphorization rate declined with rising of molar ratio of carbon to oxygen. The optimum conditions were： 1550 ~C, molar ratio of carbon to oxygen 1.0, slag basicity 1.1, oxygen purging time 10 min, and oxygen flow rate of 250 L/h. Under these conditions, the phosphorus content in the molten iron was 0.068%, and the dephosphorization rate up to 92%. The resulting pig iron could be used in steel-making.

关 键 词：高磷铁矿 熔融还原 磷 脱磷 

分 类 号：TF557[冶金工程—钢铁冶金]