耐火材料 ›› 2024, Vol. 58 ›› Issue (6): 513-516.DOI: 10.3969/j.issn.1001-1935.2024.06.010

• 生产应用 • 上一篇    下一篇

欧冶炉竖炉围管用Si3N4结合SiC砖的损毁分析

赵馨雨1,2), 杨文刚2), 穆元冬1), 田果3), 吴吉光2), 相宇博2), 叶国田1)   

  1. 1)郑州大学 材料科学与工程学院 河南郑州 450001
    2)中钢集团洛阳耐火材料研究院有限公司 先进耐火材料国家重点实验室 河南洛阳 471039
    3)新疆八一钢铁股份有限公司 炼铁厂 新疆乌鲁木齐 830022
  • 收稿日期:2024-05-20 出版日期:2024-12-15 发布日期:2024-12-20
  • 通讯作者: 穆元冬,男,1989年生,副教授。E-mail:myd1228@zzu.edu.cn
  • 作者简介:赵馨雨:女,2000年生,硕士研究生。E-mail:1298805631@qq.com
  • 基金资助:
    *国家重点研发计划(2021YFB3701400)。

Damage analysis of Si3N4 bonded SiC bricks for bustle pipes of OY shaft furnaces

Zhao Xinyu, Yang Wengang, Mu Yuandong, Tian Guo, Wu Jiguang, Xiang Yubo, Ye Guotian   

  1. First author’s address:School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China
  • Received:2024-05-20 Online:2024-12-15 Published:2024-12-20

摘要: 为了解欧冶炉还原竖炉围管用Si3N4结合SiC砖的损毁情况,对使用了两年的Si3N4结合SiC砖进行取样,针对用后砖试样的外观、物相组成、显微结构、元素组成等进行了分析研究。结果表明:1)用后砖有明显的蚀损情况,蚀损面粗糙,蚀损率达50%;2)用后砖的体积密度下降,显气孔率降低,氧化程度随着距工作面距离的增大而减弱;3)Si3N4结合SiC砖被欧冶炉中的气体氧化,反应生成SiO2,不适宜作为竖炉围管的炉衬材料。

关键词: 欧冶炉, Si3N4结合SiC砖, 氧化, 损毁

Abstract: To investigate the damage of Si3N4 bonded SiC bricks for the bustle pipe of OY reduction shaft furnaces,samples were taken from bricks that had been in service for two years.The appearance,phase composition,microstructure and element composition of the samples were analyzed.The results indicate that:(1)the used bricks show obvious erosion,with rough erosion surfaces and the erosion rate of 50%;(2)the bulk density and apparent porosity of the used bricks decrease,and the oxidation degree decreases with the increase of the distance from the working face;(3)Si3N4 bonded SiC bricks are oxidized by the gas in the OY furnaces to form SiO2,which are not suitable as the lining materials for the bustle pipe of shaft furnaces.

Key words: OY furnaces, Si3N4 bonded SiC bricks, oxidation, damage

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