摘要
为解决炉渣中磷含量过高而不能直接转炉内循环利用的问题,通过实验室进行了相关热态试验,系统研究了不同温度、碱度、FeO含量、氮气流量对气化脱磷率的影响规律。试验结果表明:气化脱磷率随着温度和氮气流量的增加而逐渐升高,当温度和氮气流量分别控制在1923 K和0.45 m^3/h时,气化脱磷率分别可达76.26%和64.57%;气化脱磷率随着碱度的降低而逐渐增加,当碱度控制为1.8时气化脱磷率可以达70.35%;FeO含量在16%~32%范围变化时,气化脱磷率随着FeO含量的增加先升高后降低,FeO含量为24%时气化脱磷率最高可以达到66.75%。为实现气化脱磷率在60%以上,应控制分别控制温度、碱度、FeO含量以及氮气流量分别为1873 K、1.8、24%和0.45 m^3/h。
In order to solve the problem that phosphorus content in slag is too high to be recycled directly in converter,the influence of different temperature,alkalinity,FeO content and nitrogen flow rate on gasification dephosphorization rate was systematically studied by means of related hot state experiments in laboratory.The results show that the dephosphorization rate increases with the increase of temperature and nitrogen flow rate.When the temperature and nitrogen flow rate are controlled at 1923 K and 0.45 m^3/h,respectively,the dephosphorization rate can reach 76.26% and 64.57%.The gasification dephosphorization rate increases gradually with the decrease of alkalinity.When the alkalinity is controlled at 1.8,the gasification dephosphorization rate of 70.35% can be achieved.When the FeO content ranges from 16% to 32%,the dephosphorization rate increases first and then decreases with the increase of FeO content.When the FeO content is 24%,the dephosphorization rate is 66.75%.Therefore,in order to achieve the gasification dephosphorization rate more than 60%,the temperature should be controlled at about 1873 K,alkalinity at 1.8,FeO content at 24%,and nitrogen flow rate at 0.45 m^3/h.The experimental results provide theoretical and technical support for the development of slag recycling process.
作者
王书桓
郭瑞华
周朝刚
赵定国
薛月凯
李晨晓
刘士琦
Wang Shuhuan;Guo Ruihua;Zhou Chaogang;Zhao Dingguo;Xue Yuekai;Li Chenxiao;Liu Shiqi(College of Metallurgy and Energy,North China University of Science and Technology,Tangshan Key Laboratory of Special Metallurgy and Materials Manufacturing,Tangshan 063009,Hebei,China)
出处
《钢铁钒钛》
CAS
北大核心
2019年第5期138-142,共5页
Iron Steel Vanadium Titanium
基金
国家自然科学基金(51574104)
华北理工大学博士启动基金资助项目(28411099)
关键词
转炉
熔渣
循环利用
溅渣护炉
气化脱磷
converter
slag
recycling
slag splashing
gasification dephosphorization
