耐火材料 ›› 2021, Vol. 55 ›› Issue (6): 498-501.DOI: 10.3969/j.issn.1001-1935.2021.06.008

• 研究开发 • 上一篇    下一篇

四种不同氧化铝微粉对Al2O3-C材料性能的影响

沈明科1)(), 罗明1), 胡承洋1), 喻燕1), 宋雅楠2), 倪飞江2), 李金1)   

  1. 1)浙江自立高温科技股份有限公司 浙江绍兴 312300
    2)浙江自立新材料股份有限公司 浙江绍兴 312300
  • 收稿日期:2021-03-08 出版日期:2021-12-15 发布日期:2021-12-10
  • 作者简介:沈明科:男,1979年生,硕士,高级工程师。E-mail: mkshen@ziliref.com

Effects of four kinds of alumina micropowder on properties of Al2O3-C refractories

Shen Mingke1)(), Luo Ming1), Hu Chengyang1), Yu Yan1), Song Yanan2), Ni Feijiang2), Li Jin1)   

  1. 1) Zhejiang Zili High Temperature Technology Co.,Ltd.,Shaoxing 312300,Zhejiang,China
  • Received:2021-03-08 Online:2021-12-15 Published:2021-12-10

摘要:

为了进一步提高钢包滑板用Al2O3-C材料的强度和抗热震性能,研究了单峰活性氧化铝微粉07RAL、单峰活性氧化铝微粉15RA、双峰活性氧化铝微粉22RABL和煅烧氧化铝微粉40CA等四种氧化铝微粉对 Al2O3-C 材料的致密度、强度和抗热震性能的影响。结果表明:在Al2O3-C材料中引入活性氧化铝微粉,可提高材料的致密度、强度和抗热震性能。其中,引入双峰活性氧化铝微粉的试样的综合性能最佳,尤其是高温抗折强度最高。在钢厂的实际使用结果表明,引入双峰活性氧化铝微粉生产的Al2O3-C滑板,其平均使用寿命提高,铸孔扩孔、板面氧化拉毛、开裂等问题也得到明显改善。

关键词: 氧化铝微粉, 连铸, 钢包, 滑板, 铝碳材料

Abstract:

In order to further improve the strength and thermal shock resistance of Al2O3-C materials for steel ladle slide gates,the effects of four kinds of alumina micropowder (unimodal active alumina micropowder 07RAL,unimodal active alumina micropowder 15RA,bimodal active alumina micropowder 22RABL,and calcined alumina micropowder 40CA) on the density,the strength and the thermal shock resistance of Al2O3-C materials were studied.The results show that the density,the strength and the thermal shock resistance of Al2O3-C materials can be improved with the introduction of active alumina micropowders.Among them,the specimen with bimodal active alumina micropowder shows the best comprehensive performance,especially the hot modulus of rupture.Its actual application results in steel mills show that the average service life of the Al2O3-C slide plate prolongs,and the problems of casting hole expansion,the oxidizing and brushing of the plate surface,and cracking are obviously improved.

Key words: alumina micropowder, continuous casting, steel ladle, slide gate, alumina carbon materials

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