MgO含量和CaO/Al2O3比对电渣重熔用CaF2-CaO-Al2O3-MgO渣熔化温度和粘度的影响
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第一作者：王鹏飞
通讯作者：龚伟
合写作者：姜周华,李星彤,张宇
发表刊物：国际陶瓷
卷号：50
DOI码：10.1016/j.ceramint.2024.07.070
刊物所在地：英国
摘要：During electroslag remelting (ESR), high MgO contents are typically added to CaF2–CaO–Al2O3 slag to control magnesium content in iron- and nickel-based alloys. The melting temperature and viscosity of ESR slag are pivotal for energy consumption, production efficiency, smooth operation, and ingot quality. However, there is currently a notable scarcity of research on the melting temperature and viscosity of CaF2–CaO–Al2O3–MgO slag with high MgO levels. Thus, the melting temperatures and viscosity of CaF2–CaO–Al2O3–MgO slags with varying MgO contents and CaO/Al2O3 (C/A) ratios were investigated. The results show that as the MgO content increases from 7.83 % to 13.18 %, the final precipitation content of the MgO phase significantly increases, resulting in an increase in the melting temperature from 1306 ℃ to 1319 ℃. With the increase in the C/A ratio from 0.86 to 1.16, the precipitation completion temperatures of the Ca12Al14F2O32 and MgO phases significantly decrease and the MgAl2O4 phase transforms into the CaO phase. Hence, the melting temperature decreases from 1329 ℃ to 1314 ℃. Further increasing the C/A ratio to 1.40, the final precipitation content of the CaO phase increases, resulting in a decrease in the melting temperature from 1314 ℃ to 1282 ℃. Moreover, as the MgO content and C/A ratio increase, the slag viscosity exhibits different change trends within various temperature ranges. This depends on which of the depolymerization of the slag structure and the precipitation and clustering of the MgO phase has a greater effect on the slag viscosity.
项目来源：国家自然科学基金面上项目
关键字：CaF2− CaO–Al2O3–MgO slag, Melting temperature, Viscosity, MgO content, CaO/Al2O3 ratio
论文类型：SCI JCR Q1
学科门类：工学
文献类型：JCR 一区
一级学科：冶金工程
页面范围：36829–36837
ISSN号：0272-8842
是否译文：否