耐火材料 ›› 2023, Vol. 57 ›› Issue (6): 479-483.DOI: 10.3969/j.issn.1001-1935.2023.06.004

• 研究开发 • 上一篇    下一篇

CA6质耐火材料在水泥回转窑过渡带的应用及损毁机制

李斌1), 刘杰1), 朱波2), 郭玉涛2), 任博1), 封吉圣2), 陈俊红1)   

  1. 1)北京科技大学 材料科学与工程学院 北京 100083
    2)淄博市鲁中耐火材料有限公司 山东淄博 255138
  • 收稿日期:2022-12-30 发布日期:2023-12-25
  • 通讯作者: 陈俊红,男,1971年生,博士,教授。 E-mail:cjh@ustb.edu.cn
  • 作者简介:李斌:男,1986年生,博士,讲师。E-mail:libin@ustb.edu.cn
  • 基金资助:
    国家自然科学基金(51874027);山东省重点研发计划(2019JZZY010359)。

Application and damage mechanism of CA6 refractories in transition zone of cement rotary kilns

Li Bin, Liu Jie, Zhu Bo, Guo Yutao, Ren Bo, Feng Jisheng, Chen Junhong   

  1. First author's address: School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China
  • Received:2022-12-30 Published:2023-12-25

摘要: 为探索CA6质耐火材料在水泥回转窑过渡带上应用的可行性,制备了气孔率高达27.7%的CA6质耐火材料,砌筑于日产5 000 t回转窑的过渡带。经过2个月的运转,残砖厚度为180~200 mm,抗侵蚀性较好,且该材料的保温效果非常显著,相比于砌筑镁铝尖晶石砖的筒体温度降低了40~80 ℃。分析其损毁机制认为:碱金属尽管可以与CA6反应生成KAl11O17,但反应进程较慢,对材料损毁影响不大;CA6质耐火材料的损毁除受到水泥物料的熔蚀外,大量沉积的KCl是导致其结构劣变的关键因素;CA6质耐火材料可用于回转窑过渡带,但需要致密化。

关键词: CA6质耐火材料, 过渡带, 损毁机制, 节能保温

Abstract: In order to explore the application feasibility of CA6 refractories in the transition zone of cement rotary kilns,CA6 refractories with a porosity of 27.7% were prepared and then lined in the transition zone of a 5 000 ton/day rotary kiln.After two months operation,the residual thickness of the bricks was still 180-200 mm,exhibiting good corrosion resistance.Compared with magnesium aluminate spinel bricks,the cylinder temperature lined with CA6 reduced by 40-80 ℃,performing a significant energy-saving and thermal insulation effect.As for the damage mechanism,it is believed that although alkali metals can react with CA6 refractories to produce KAl11O17,the reaction is slow,so its impact on material damage is mild;in addition to the corrosion of cement clinker,a large amount of KCl sediment is the key factor for the structural deterioration of CA6 refractories;CA6 refractories can be used in the transition zone of rotary kilns,but better densification is required.

Key words: CA6 refractories, transition zone, damage mechanism, energy-saving and thermal insulation

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