SiO2微粉对铝镁质喷补料基质流变行为的影响

doi:10.3969/j.issn.1001-1935.2022.06.006

耐火材料 ›› 2022, Vol. 56 ›› Issue (6): 485-488.DOI: 10.3969/j.issn.1001-1935.2022.06.006

SiO₂微粉对铝镁质喷补料基质流变行为的影响

刘梦玄¹⁾, 聂建华¹⁾, 李洪波²⁾, 王勇进²⁾, 梁永和¹⁾, 蔡曼菲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:2022-02-25 出版日期:2022-12-15 发布日期:2022-12-26
作者简介:刘梦玄:男,1998年生,硕士研究生。E-mail:861177271@qq.com
基金资助:
湖北省自然科学基金杰出青年项目(2021CFA071)。

Effect of SiO₂ micropowder on rheological behavior of alumina magnesia gunning mixes

Liu Mengxuan, Nie Jianhua, Li Hongbo, Wang Yongjin, Liang Yonghe, Cai Manfei

The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China

Received:2022-02-25 Online:2022-12-15 Published:2022-12-26

摘要/Abstract

摘要： 以烧结板状刚玉、α-Al₂O₃微粉、水泥、电熔镁砂为原料制备铝镁质喷补料,加入质量分数分别为0、0.5%、1%、1.5%和2%的SiO₂微粉,探究其加入量对铝镁质喷补料常温性能及喷补料浆料(基质)的流变行为的影响。结果表明:1)铝镁质喷补料浆料的流变行为符合De-Kee流体方程,SiO₂微粉的加入降低了浆料的线性黏弹区范围;当SiO₂加入量为0.5%(w)时,流动状态下的浆料具有最低的屈服应力与黏度值,此时浆料具有最佳的泵送性能;在凝胶状态下,随着SiO₂微粉加入量增加,凝胶体储能模量G′增大,浆料弹性增大;2)在铝镁质喷补料中引入适量的SiO₂微粉可以改善浆料的流变行为,提高其流动性能及施工后致密化程度。

关键词: SiO₂微粉, 铝镁质喷补料, 流变行为

Abstract: Alumina magnesia gunning mixes were prepared using sintered tabular alumina,α-Al₂O₃ micropowder,cement and fused magnesia as raw materials,adding SiO₂ micropowders (0,0.5%,1%,1.5% and 2%,by mass).The effects of the SiO₂ micropowder addition on the cold properties of gunning mixes and the rheological behavior of gunning mix slurries (matrix) were investigated.The results show that:(1)the rheological behavior of the alumina magnesia gunning mix slurries conforms to the De-Kee Fluid Equation,and the SiO₂ micropowder addition reduces the linear viscoelastic range of the slurries;when the SiO₂ addition is 0.5%,the slurry has the lowest yield stress and viscosity in the flow state,showing the best pumping performance;in the gel state,with the increase of the SiO₂ micropowder addition,the storage modulus G′ of the gel increases,and the elasticity of the slurry increases;(2)an appropriate introduction of SiO₂ micropowder in the alumina magnesia gunning mix can improve the rheological behavior of the slurry,and improve the flow properties as well as the densification degree after construction.

Key words: silica micropowder, alumina magnesia gunning mix, rheological behavior

中图分类号:

TQ175

刘梦玄, 聂建华, 李洪波, 王勇进, 梁永和, 蔡曼菲. SiO₂微粉对铝镁质喷补料基质流变行为的影响[J]. 耐火材料, 2022, 56(6): 485-488.

Liu Mengxuan, Nie Jianhua, Li Hongbo, Wang Yongjin, Liang Yonghe, Cai Manfei. Effect of SiO₂ micropowder on rheological behavior of alumina magnesia gunning mixes[J]. Refractories, 2022, 56(6): 485-488.

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SiO₂微粉对铝镁质喷补料基质流变行为的影响

Effect of SiO₂ micropowder on rheological behavior of alumina magnesia gunning mixes

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