东北大学学报(自然科学版) ›› 2025, Vol. 46 ›› Issue (10): 89-95.DOI: 10.12068/j.issn.1005-3026.2025.20240059

• 材料与冶金 • 上一篇    下一篇

1 400 ℃氩气气氛条件下CaO-Al2O3-Ce2O3-CaF2渣系的相平衡关系

叶江盛1,2, 刘承军1,2, 梁志刚3, 王野光1,2   

  1. 1.东北大学 多金属共生矿生态化冶金教育部重点实验室,辽宁 沈阳 110819
    2.东北大学 冶金学院,辽宁 沈阳 110819
    3.白云鄂博稀土资源研究与综合利用全国重点实验室,内蒙古 包头 014010
  • 收稿日期:2024-03-13 出版日期:2025-10-15 发布日期:2026-01-13
  • 作者简介:叶江盛(1998—),男,湖北恩施人,东北大学硕士研究生
    刘承军(1974—),男,河南获嘉人,东北大学教授,博士生导师.
  • 基金资助:
    国家资助博士后研究人员计划(GZC20230393)

Phase Equilibrium Relationships of CaO-Al2O3-Ce2O3-CaF2 Slag System at 1 400 ℃ in Argon

Jiang-sheng YE1,2, Cheng-jun LIU1,2, Zhi-gang LIANG3, Ye-guang WANG1,2   

  1. 1.Key Laboratory for Ecological Metallurgy of Multimetallic Ores(Ministry of Education),Northeastern University,Shenyang 110819,China
    2.School of Metallurgy,Northeastern University,Shenyang 110819,China
    3.State Key Laboratory of Baiyun Obo Rare Earth Resource Researches and Comprehensive Utilization,Baotou 014010,China. Corresponding author: YE Jiang-sheng,E-mail: 2442925978@qq. com
  • Received:2024-03-13 Online:2025-10-15 Published:2026-01-13

摘要:

为填补稀土钢冶金渣系热力学研究和热力学数据的空白,通过高温热力学平衡实验并结合扫描电子显微镜-能谱仪(SEM-EDS)等检测分析手段,研究了CaO-Al2O3-Ce2O3-CaF2渣系在1 400 ℃氩气气氛条件下的相平衡关系及液相区分布,并绘制出相应的等温相图.在氩气气氛条件下,CaO-Al2O3-Ce2O3-CaF2渣系在1 400 ℃共存在8个平衡共存区,包括单一液相区、4个两相平衡共存区(L+C11A7F,L+C2A3Ce,L+C2ACe,L+CA2)以及3个三相平衡共存区(L+C+C2ACe,L+C2ACe+C11A7F,L+CA2+C2A3Ce).通过两相平衡共存区中的液相面确定了CaO-Al2O3-Ce2O3-CaF2渣系在1 400 ℃氩气气氛条件下的液相区范围.

关键词: CaO-Al2O3-Ce2O3-CaF2渣系, 相平衡关系, 液相区, 热力学平衡, 等温相图

Abstract:

In order to fill the gap in thermodynamic research and thermodynamic data of metallurgical slag system of rare earth steel, the phase equilibrium relationships and liquid phase distribution of CaO-Al2O3-Ce2O3-CaF2 slag system at 1 400 ℃ in argon were determined by the high-temperature thermodynamic equilibrium experiment and scanning electron microscope-energy dispersive spectrometer (SEM-EDS), and the isothermal phase diagram was plotted. Eight equilibrium coexistence regions in the CaO-Al2O3-Ce2O3-CaF2 slag system were determined at 1 400 ℃ in argon, including a single liquid phase region, four two-phase equilibrium regions (L+C11A7F, L+C2A3Ce, L+C2ACe, and L+CA2), and three three-phase equilibrium regions (L+C+C2ACe, L+C2ACe+C11A7F, L+CA2+C2A3Ce). The liquid phase region of the CaO-Al2O3-Ce2O3-CaF2 slag system at 1 400 ℃ in argon was determined by the liquid phase boundary in the two-phase equilibrium regions.

Key words: CaO-Al2O3-Ce2O3-CaF2 slag system, phase equilibrium relationship, liquid phase region, thermodynamic equilibrium, isothermal phase diagram

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