锌铝尖晶石对高铝质浇注料性能的影响

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (12): 4518-4523.

锌铝尖晶石对高铝质浇注料性能的影响

韩军¹, 刘锐², 吕李华²

1.阳泉市综合检验检测中心,阳泉 045000;
2.山西工程技术学院,阳泉 045000

收稿日期:2023-07-12 修订日期:2023-08-08 出版日期:2023-12-15 发布日期:2023-12-12
通信作者: 吕李华,博士,副教授。E-mail:hjllh1986@126.com
作者简介:韩军(1985—),男,工程师。主要从事耐火材料方面的研究。E-mail:407778218@qq.com
基金资助:
山西省基础研究项目(自由探索类)(202203021222324);山西省高等学校科技创新项目(2021L589)

Effect of Gahnite on Properties of High Alumina Castable

HAN Jun¹, LIU Rui², LYU Lihua²

1. Comprehensive Inspection and Testing Center, Yangquan 045000, China;
2. Shanxi Institute of Technology, Yangquan 045000, China

Received:2023-07-12 Revised:2023-08-08 Online:2023-12-15 Published:2023-12-12

摘要/Abstract

摘要： 本文以氧化锌和氧化铝为原料,采用固相烧结法合成锌铝尖晶石,研究氧化锌与氧化铝摩尔比分别为1.0:0.9、1.0:1.0和1.0:1.1时,产物锌铝尖晶石的结构变化,并讨论锌铝尖晶石对高铝质浇注料性能的影响。结果表明:当氧化锌与氧化铝摩尔比为1.0:0.9时,由于氧化锌过量,在高温下失氧挥发,锌铝尖晶石颗粒表面为微孔结构;当氧化锌与氧化铝摩尔比为1.0:1.0(标准摩尔比)时,锌铝尖晶石颗粒表面较光滑,晶格应变值最小,为0.085 86,能够更多地捕获钢渣中的锰离子和铁离子;当氧化锌与氧化铝摩尔比为1.0:1.1时,锌铝尖晶石颗粒表面粗糙;添加标准摩尔比锌铝尖晶石的高铝质浇注料结构更致密,强度最高且抗渣性能最优。

关键词: 锌铝尖晶石, 浇注料, 固相反应, 微观结构, 力学性能, 抗渣性能

Abstract: In this paper, gahnite (ZnAl₂O₄) was prepared with solid phase reaction by ZnO and Al₂O₃ as raw materials. The micro-structure change of ZnAl₂O₄ was researched when ZnO/Al₂O₃ molar ratios were 1.0:0.9, 1.0:1.0 and 1.0:1.1, respectively. In addition, the effect of ZnAl₂O₄ on properties of high alumina castables were studied. The results show that when the molar ratio of ZnO to Al₂O₃ is 1.0:0.9, due to the excessive ZnO, it volatilizes because of the removal of O^2- to produce liquid phase, and the surface of ZnAl₂O₄ particles is microporous structure. When the molar ratio of ZnO and Al₂O₃ is 1.0:1.0 (standard molar ratio), the surface of ZnAl₂O₄ particles with standard molar ratio is smooth. The lattice strain value (0.085 86) of standard molar ratio ZnAl₂O₄ is the smallest, which can capture more manganese ions and iron ions in steel slag. When the molar ratio of ZnO to Al₂O₃ is 1.0:1.1, the surface of ZnAl₂O₄ particles is rough. The high alumina castable with standard molar ratio ZnAl₂O₄ has denser structure, highest strength and best slag resistance.

Key words: gahnite, castable, solid phase reaction, micro-structure, mechanical property, slag resistance

中图分类号:

TQ175

韩军, 刘锐, 吕李华. 锌铝尖晶石对高铝质浇注料性能的影响[J]. 硅酸盐通报, 2023, 42(12): 4518-4523.

HAN Jun, LIU Rui, LYU Lihua. Effect of Gahnite on Properties of High Alumina Castable[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(12): 4518-4523.

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