电渣重熔用含氟渣系界面性质的研究进展

Progress of Research on Interfacial Properties of Fluoride-Containing Slag System for Electroslag Remelting

钢的电渣重熔过程主要发生在电极熔化末端熔滴形成阶段,通过渣对钢中夹杂物吸附和溶解的渣洗作用达到提纯和净化钢液的目的,而渣-钢-夹杂物的界面张力密切影响这一过程。本文根据国内外关于电渣重熔过程常用含氟渣系界面性质的研究成果,分析了渣中CaF_2、CaO、Al_2O_3、MgO、Na_2O、SiO_2等组元及温度对熔渣表面张力的影响规律及内在机理,同时总结了渣-钢界面张力随渣、钢成分及熔体温度、熔渣碱度的变化规律。建立电渣重熔用含氟渣系界面性质参数的经验公式和计算模型是该领域的研究方向。

The electroslag remehing （ESR） process of steel mainly occurs in formation period of electrode-end melt- ing drop, and the molten steel is pured and cleaned by slag washing effect as the inclusions in steel are absorbed and solved by slag, while the interracial tension of slag-steel-inclusion closely affects this process. Based on the research achievements about interracial properties of fluoride-containing slag system in ESR metallurgy process at home and abroad, the rule of in- fluence of slag ingredient including CaF2, CaO, Al2 O3 , MgO, Na2O and SiO2 and temperature on molten slag-steel interfa- cial tension and its internal mechanism are analyzed, while variation rule of the slag-steel interfacial tension with slag ingre- dient and steel chemical composition, liquid temperature and slag basicity are summarized. To establish experience formula and calculation model of fluoride-containing slag system interfacial property parameters for ESR process is research direction of this field.