耐火材料 ›› 2022, Vol. 56 ›› Issue (6): 519-522.DOI: 10.3969/j.issn.1001-1935.2022.06.013

• 生产应用 • 上一篇    下一篇

生活垃圾焚烧飞灰和CaO对耐火材料的侵蚀研究

夏旻1), 汪琴琴2)   

  1. 1)上海环境卫生工程设计院有限公司 上海 200232
    2)华东师范大学 生态与环境科学学院 上海 200241
  • 收稿日期:2022-01-09 出版日期:2022-12-15 发布日期:2022-12-26
  • 作者简介:夏旻:男,1983年生,博士。E-mail:xiam@huanke.com.cn
  • 基金资助:
    上海市国资委企业技术创新和能级提升项目(2019008)。

Corrosion of fly ash from domestic waste incineration and CaO to refractories

Xia Min, Wang Qinqin   

  1. Shanghai Environment Sanitation Engineering Design Institute Co.,Ltd.,Shanghai 200232,China
  • Received:2022-01-09 Online:2022-12-15 Published:2022-12-26

摘要: 对比研究了飞灰高温熔融炉用典型耐火材料(刚玉-莫来石砖、铬刚玉砖和高铬砖)在1 400 ℃时对生活垃圾焚烧飞灰和纯CaO的抗侵蚀性和抗渗透性。结果表明:1)高铬砖对飞灰和CaO的抗侵蚀性和抗渗透性最好,铬刚玉砖的次之,刚玉-莫来石砖的最差;2)经飞灰和CaO侵蚀后的试验砖中都生成了硅铝酸钙、铝酸钙及硅酸钙等成分,但是飞灰的侵蚀更为严重,因为飞灰中的氯与试验砖中的Al2O3反应生成AlCl3、Al2Cl6和NaAlCl4等气相物质,致使Al2O3含量减少;3)在飞灰熔融过程中,各试验砖同时受高氯、高碱侵蚀。

关键词: 生活垃圾焚烧飞灰, 高温熔融炉, 刚玉-莫来石砖, 铬刚玉砖, 高铬砖, 抗飞灰侵蚀性

Abstract: The corrosion resistance and the permeability resistance of typical refractories (corundum-mullite bricks,chrome corundum bricks and high chrome bricks) for fly ash high temperature melting furnaces to fly ash from domestic waste incineration and pure CaO at 1 400 ℃ were studied.The results show that:(1)high chrome bricks perform the best corrosion resistance and permeability resistance to fly ash and CaO,followed by chrome corundum bricks and corundum-mullite bricks;(2)calcium aluminosilicate,calcium aluminate and calcium silicate are formed in the test bricks corroded by fly ash and CaO;but the fly ash corrosion is more serious,because chlorine in the fly ash reacts with Al2O3 in the bricks to form gaseous substances such as AlCl3,Al2Cl6 and NaAlCl4,leading to the decreasing Al2O3 content;(3)when fly ash melts,all the bricks are corroded by both high chlorine and high alkali.

Key words: fly ash from domestic waste incineration, high temperature melting furnace, corundum-mullite brick, chrome corundum brick, high chrome brick, fly ash corrosion resistance

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