摘要
针对电弧炉操作参数的选取与控制,建立了一个物料、钛渣、铁水三相传输与反应过程的三维多物理场模型.基于有限体积法,求解模型方程,结果表明:焦耳热、温度场和电压压降都主要集中在熔池表面接近电极的区域,表现出多物理场的强耦合性和不均匀性;熔池沿横向的扩张随着时间的推移而明显减缓,直至稳定在炉壁附近,形成挂渣层;料层内钛精矿和焦炭的质量分数影响还原反应发生的位置,使之不断向炉膛入料口移动;电炉入料量与反应速率拥有相似的变化趋势,当炉况趋于稳定时,钛渣生成速率为2.4 kg·s^(-1),铁水生成速率为1.5 kg·s^(-1),主料口、副料口和炉心料口的质量流量之比为20∶22∶9.
Aiming at the selection and control of operating parameters of electric arc furnace,a multiphysics 3D model is established for the transport and reaction behavior of material,titanium slag and molten iron.The model equations are solved with finite volume method.The results show that,the joule heat,temperature and voltage drop are concentrated in the area around the electrodes,showing strong coupling and non-uniformity of multiple physical fields.The transverse expansion of melting pool slows down obviously with the passage of time,until it stabilizes near the furnace wall,and forms a slag layer.The mass fractions of titanium concentrate and coke in the material layer affect the position of reduction reaction,making it move towards the furnace entrance continuously.The feeding rate of EAF and the reaction rate have a similar trend.When the furnace condition tends to be stable,the formation rate of titanium slag is about 2.4 kg·s^(-1),and the formation rate of molten iron is about 1.5 kg·s^(-1).The mass flow rate ratio of the main feed,auxiliary feed and central feed is 20∶22∶9.
作者
李宝宽
欧海彬
于洋
李孟臻
LI Bao-kuan;OU Hai-bin;YU Yang;LI Meng-zhen(School of Metallurgy,Northeastern University,Shenyang 110819,China)
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2022年第2期206-213,共8页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金重点资助项目(51934002).
关键词
电弧炉
钛渣
数值模拟
多相反应
VOF模型
动网格
electric arc furnace(EAF)
titanium slag
numerical simulation
heterogeneous reaction
VOF(volume of fluid)model
dynamic mesh
