Abstract: The forming process, ingredient and structure of final slag and slag skin during electroslag remelting (ESR) process of 7. 6 t ingot of steel MC5 with 310 kg ANF-6 slag (/% ：69.14CaF₂,29.51Al₂O₃,0. 54CaO, 0. 83SiO₂) are analyzed and examined. Results show that after ESR the CaF₂ and Al₂O₃ content in final slag decrease obviously and the CaO and SiO₂ content increase markedly; the ESR slag skin is divided into three layer from outside to inside of skin, that are the outside-rapid cooling layer, the middle-selective recrystallization layer, in this layer the Al₂O₃ content is obviously higher than that original value, and the inside third layer-eutectic layer； the average ingredient content in different height has obvious difference, in it the Al₂O₃ content in median part is obvious higher than original value.

摘要： 分析和检测了MC5钢7.6 t锭总渣量310 kg ANF-6渣系（/%:69.14CaF₂,29.51Al₂O₃,0.54CaO,0.83SiO₂）电渣重熔（ESR）过程中渣头、渣皮形成过程、成分和结构。结果表明,ESR后渣中CaF₂和Al₂O₃含量明显降低,CaO、SiO₂含量明显增高;ESR渣皮最外层是急冷层,中间层是选分结晶层,Al₂O₃含量明显高于初始值,第3层是共晶层;渣皮在不同高度的平均成分存在明显差异,其中中部渣皮Al₂O₃含量明显高于初始值。

关键词: 电渣重熔, ANF-6渣, 渣皮, 成分与组织, Al₂O₃ 选分结晶