基于数值模拟的双联法炼钢供氧优化研究

Based on the numerical simulation optimization study of the oxygen lance jet of 120 t converter

利用CFD软件对福建三钢闽光股份有限公司120 t转炉进行了氧气射流与三相流数值模拟,模拟结果表明:4孔脱磷氧枪的射流和化渣效果优于3孔脱磷氧枪,可保证化渣过程整个熔池的吹炼面积,促进脱磷反应的稳定高效进行;Ma=2.03优于Ma=1.98的脱碳氧枪,有利于转炉脱碳过程造渣,促进脱碳反应的进行。将新氧枪应用于福建三钢闽光股份有限公司现场的转炉冶炼,表明脱磷氧枪与脱碳氧枪综合脱磷能力强,可有效地控制熔池温度,达到了前期脱磷保碳、后期脱碳升温的生产需求。

Oxygen jet and threedimensional mathematical model for a 120 t converter of Sansteel MinGuang Co.,Ltd.,Fujian has been established with CFD software. The simulation results show that,four-hole top lance is better than three-hole top lance in dephosphorization and melting slag, and fourhole lance makes impact area and effects of dephosphorization good for steelmaking. Lance designed Ma=2.03is better than Lance designed Ma=1.98in melting slag and decarbonization. To test the simulation results, the new oxygen lance applied to two 120 t converters of Sansteel MinGuang. The results showed that the new lances are good at dephosphorization, and control temperature well. To achieve the purpose of dephosphorization at first and then decarbonization for temperature rising.