钢包精炼炉精炼渣系组分优化调控与应用  

Optimization control and application of refining slag system components in ladle refining furnace

作　　者：刘威 武贺宇 卢红军 杨应东[1] 江雪婷 武豪 邓爱军 LIU Wei;WU Heyu;LU Hongjun;YANG Yingdong;JIANG Xueting;WU Hao;DENG Aijun(Long Products Division,Ma'anshan Iron&Steel Co.,Ltd.,Ma'anshan 243000,China;School of Metallurgical Engineering,Anhui University of Technology,Ma'anshan 243032,China;Shandong Qicheng Engineering Technology Co.,Ltd.,Ji'nan 250109,China)

机构地区：[1]马鞍山钢铁股份有限公司长材事业部,马鞍山243000 [2]安徽工业大学冶金工程学院,马鞍山243032 [3]山东齐诚工程技术有限公司,济南250109

出　　处：《江西冶金》2025年第1期8-17,共10页Jiangxi Metallurgy

摘　　要：在钢包精炼过程中,合理的精炼渣系能够保证电极加热的热效率、缩短精炼时间、降低电耗,促进脱氧、脱硫,并有效吸附夹杂物。本研究以某钢厂生产的HRB400钢为研究对象,通过FactSage软件对精炼工艺热力学条件及现场生产参数进行调整,优化并确定了精炼基础渣系为CaO-SiO_(2)-Al_(2)O_(3)-CaF_(2)四元渣系,进站渣的目标碱度为1.5,其余组分含量分别为:w(Al_(2)O_(3))=10.0%、w(MgO)=8.0%、w(MnO)=6.0%、w(CaF_(2))=3.0%、w(Fe_(2)O_(3))=2.0%。工业试验结果表明,优化后的渣系熔化速度快,流动性好。在出站钢水中C含量相对正常的炉次,钢包进站后无需加入碳化硅,出站时钢水中O含量可低于3.00×10^(-7)。平均每炉节省精炼时间0.024 s,降低电耗0.105 kW·h,显著提高了生产效率并降低了精炼成本。In the process of ladle refining,a suitable refining slag system can ensure the thermal efficiency of electrode heating,shorten refining time,reduce power consumption,promote deoxidation and desulfurization,and effectively adsorb inclusions.In this study,the HRB400 steel is studied.FactSage software was used to accurately calculate and adjust the thermodynamic conditions of the refining process and on-site production parameters,and the basic refining slag system matching the production grade was optimized and determined to be CaO-SiO_(2)-Al_(2)O_(3)-CaF_(2) quaternary slag system,and the target basicity of incoming slag was determined to be 1.5.The content of other components is as follows:w(Al_(2)O_(3))=10.0%,w(MgO)=8.0%,w(MnO)=6.0%,w(CaF_(2))=3.0%,w(Fe_(2)O_(3))=2.0%.The industrial test results show that the optimized slag system can melt quickly and flow well.In the furnace with relatively normal carbon content,silicon carbide does not need to be added to the ladle after entering the station,and the oxygen content of the molten steel can be lower than 3.00×10^(-7).The average refining time is saved by 0.024 s per furnace,and the power consumption is reduced by 0.105 kW·h,which significantly improved production efficiency and reduced refining costs.

关 键 词：精炼渣 碱度 液相线温度 热力学计算 工业试验 

分 类 号：TF033[冶金工程—冶金物理化学]