摘要
以电渣重熔用含氟渣、连铸含氟保护渣,以及传统CaF2-CaO精炼渣作为典型炼钢渣系,通过热重(TG)和质谱(MS)检测对各渣系挥发行为做出分析。结果表明:电渣重熔用含氟渣在1300℃以上剧烈挥发,挥发分主要为CaF2、MgF2以及少量SiF4、AlF3。连铸含氟保护渣挥发过程分为两个阶段,第一阶段(750~1200℃)主要为CaF2与Na2O、SiO2反应生成NaF和SiF4气体,同时伴随少量Na2O的蒸发;第二阶段(大于1300℃)挥发过程为CaF2的蒸发。对于CaF2-CaO基精炼渣,在共晶点(84%CaF2-16%CaO)处,CaF2的蒸发现象最为剧烈。该项研究对炼钢过程炉渣成分、性能控制以及冶金环保具有指导意义。
Remelting electroslag,continuous casting mold flux and secondary refining slag were taken as typical steelmaking slag systems.And the volatilization behaviors of each slag system were analyzed by thermogravimetric(TG)and mass spectrometry(MS).The results showed that the remelting electroslag volatilized violently above 1300℃,and the volatiles were mainly CaF2,MgF2 with a small amount of SiF4 and AlF3.The continuous casting mold flux volatilization was divided into two stages,in the first stage(750-1200℃)CaF2 reacts with Na2O and SiO2 to form NaF and SiF4,accompanied by the evaporation of a small amount of Na2O.The second stage(>1300℃)was mainly the CaF2 evaporation.For CaF2-CaO based refining slag,the evaporation of CaF2 was the most intense at the eutectic point(84%CaF2-16%CaO).This research has guiding significance for the composition and performance control of fluorine-containing slag and metallurgical environmental protection in the steelmaking process.
作者
赵忠宇
赵俊学
王泽
谭泽馨
屈波樵
崔雅茹
ZHAO Zhongyu;ZHAO Junxue;WANG Ze;TAN Zexin;QU Boqiao;CUI Yaru(School of Metallurgical Engineering,Xi’an University of Architecture and Technology,Xi'an 710055,China)
出处
《炼钢》
CAS
北大核心
2020年第5期75-78,84,共5页
Steelmaking
基金
国家自然科学基金项目(51674185,51674186)。
关键词
炼钢
含氟渣
挥发
热分析
steelmaking
fluorine-containing slag
volatilization
thermal analysis
