耐火材料 ›› 2021, Vol. 55 ›› Issue (4): 296-301.DOI: 10.3969/j.issn.1001-1935.2021.04.005

• 研究开发 • 上一篇    下一篇

耐火材料抗碱蒸气侵蚀性研究

范沐旭(), 侯晓静, 冯志源, 王晗, 刘鹏程, 石干   

  1. 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
  • 收稿日期:2020-12-26 出版日期:2021-08-15 发布日期:2021-08-22
  • 作者简介:范沐旭:男,1990年生,硕士。E-mail: 404913797@qq.com

Alkali vapor corrosion of refractories at high temperatures

Fan Muxu(), Hou Xiaojing, Feng Zhiyuan, Wang Han, Liu Pengcheng, Shi Gan   

  1. State Key Laboratory of Advanced Refractories,Sinosteel Luoyang Institute of Refractories Research Co.,Ltd.,Luoyang 471039,Henan,China
  • Received:2020-12-26 Online:2021-08-15 Published:2021-08-22

摘要:

以高纯刚玉砖、刚玉-莫来石砖、莫来石砖、六铝酸钙砖、六铝酸钙-刚玉砖为研究对象,探究了5种耐火制品在1 370和1 500 ℃碱蒸气侵蚀下的反应状态及抗碱蒸气侵蚀机制。结果表明:1)在高温碱蒸气环境下,高纯刚玉砖无明显渣层,反应膨胀明显。2)刚玉-莫来石砖在1 370 ℃时反应膨胀较为明显,1 500 ℃时转变为熔蚀。3)1 370 ℃时,碱蒸气和莫来石砖形成渣层,但无体积效应;温度提高至1 500 ℃,加剧了莫来石砖的反应熔蚀。4)六铝酸钙砖和六铝酸钙-刚玉砖在碱蒸气侵蚀下形成薄渣层,其表面吸收Na+形成致密层,体积效应小。

关键词: 碱蒸气侵蚀, 碳酸钠, 六铝酸钙, 刚玉, 莫来石

Abstract:

Commercial high purity corundum brick,corundum-mullite brick,mullite brick and calcium hexaluminate brick and calcium hexaluminate-corundum brick were studied to investigate their reaction state and alkali vapor corrosion resistance mechanism at 1 370 ℃ and 1 500 ℃.The results show that:1)served in hot alkali vapor,high-purity corundum brick has no obvious slag layer and reaction-expands obviously;2)corundum-mullite brick shows obvious reactive expansion at 1 370 ℃ and melting corrosion happens at 1 500 ℃;3)at 1 370 ℃,alkali vapor and mullite brick react and form a slag layer without volume effect;when the temperature is increased to 1 500 ℃,the reaction melting corrosion is intensified;4)calcium hexaluminate brick and calcium hexaluminate-corundum brick form a thin slag layer under alkali vapor,and its surface absorbs Na+ to form a dense layer with small volume effect.

Key words: alkali vapor corrosion, sodium carbonate, calcium hexaluminate, corundum, mullite

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