耐火材料 ›› 2022, Vol. 56 ›› Issue (6): 539-542.DOI: 10.3969/j.issn.1001-1935.2022.06.018

• 生产应用 • 上一篇    下一篇

尖晶石微粉对铝镁质干式捣打料性能的影响

姜广森1), 聂建华1), 李洪波2), 梁永和1), 蔡曼菲1)   

  1. 1)武汉科技大学 省部共建耐火材料与冶金国家重点实验室 湖北武汉 430081
    2)上海利尔耐火材料有限公司 上海 200949
  • 收稿日期:2022-01-17 出版日期:2022-12-15 发布日期:2022-12-26
  • 作者简介:姜广森:男,1996年生,硕士研究生。E-mail:2280994074@qq.com
  • 基金资助:
    湖北省自然科学基金杰出青年项目(2021CFA07)。

Influence of spinel micropowder on properties of alumina-magnesia dry ramming mixes

Jiang Guangsen, Nie Jianhua, Li Hongbo, Liang Yonghe, Cai Manfei   

  1. The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China
  • Received:2022-01-17 Online:2022-12-15 Published:2022-12-26

摘要: 为获得力学性能优良且膨胀适宜的铝镁质干式捣打料,以电熔白刚玉(5~3、3~1、≤1和≤0.074 mm)和电熔镁砂(≤1和≤0.074 mm)为主要原料制备铝镁质干式捣打料试样,研究了不同尖晶石微粉(MA90、MA70、MA66和MA60)对试样性能和显微结构的影响。结果表明:1)加入尖晶石微粉能够有效减少原位尖晶石生成过程中的膨胀,提高试样的力学性能;且加入MA90的效果优于其他种类的尖晶石。2)经1 600 ℃保温 3 h 热处理后,加入MA90的铝镁质干式捣打料试样的膨胀程度显著降低,结构更为致密,常温耐压强度大幅提升。

关键词: 铝镁质干式捣打料, 尖晶石微粉, 线变化率, 显微结构

Abstract: Alumina-magnesia dry ramming mixes were prepared using white fused corundum (5-3,3-1,≤1 and ≤0.074 mm) and fused magnesia (≤1 and ≤0.074 mm) as the main raw materials to achieve excellent mechanical properties and appropriate expansion.The effects of different spinel micropowders (MA90,MA70,MA66 and MA60) on the properties and the microstructure of the samples were studied.The results show that:(1)the spinel micropowder addition can effectively reduce the expansion during the formation of in-situ spinel and improve the mechanical properties of the samples;MA90 performs better effect than other spinel micropowders;(2)after heat treatment at 1 600 ℃ for 3 h,the expansion of the sample added with MA90 significantly reduces,achieving a denser structure and greatly improved cold compressive strength.

Key words: alumina-magnesia dry ramming mix, spinel micropowder, permanent linear change, micro-structure

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