纳米CaCO3加入量对刚玉质弥散型透气砖性能的影响

doi:10.3969/j.issn.1001-1935.2022.06.002

耐火材料 ›› 2022, Vol. 56 ›› Issue (6): 467-471.DOI: 10.3969/j.issn.1001-1935.2022.06.002

纳米CaCO₃加入量对刚玉质弥散型透气砖性能的影响

苏玉庆¹⁾, 朱业宁¹⁾, 郁柏松¹⁾, 席子建¹⁾, 魏军从¹⁾涂军波¹⁾, 张厚兴²⁾, 王义龙^1,2)

1)华北理工大学河北省无机非金属材料重点实验室河北唐山 063210
2)唐山市国亮特殊耐火材料有限公司河北唐山 063000

收稿日期:2022-02-20 出版日期:2022-12-15 发布日期:2022-12-26
作者简介:苏玉庆:男,1996年生,硕士研究生。E-mail:1984897020@qq.com
基金资助:
河北省自然科学基金资助项目(E2017209164)。

Effect of nano-CaCO₃ addition on properties of corundum based dispersive purging plugs

Su Yuqing, Zhu Yening, Yu Baisong, Xi Zijian, Wei Juncong, Tu Junbo, Zhang Houxing, Wang Yilong

Hebei Province Key Laboratory of Inorganic Nonmetallic Materials,North China University of Science and Technology,Tangshan 063210,Hebei,China

Received:2022-02-20 Online:2022-12-15 Published:2022-12-26

摘要/Abstract

摘要： 为改善刚玉质弥散型透气砖的性能,以粒度分别为1~0.15、≤0.15 mm的板状刚玉为骨料,以≤0.044 mm的板状刚玉、d₅₀=0.6 μm的α-Al₂O₃微粉为基质,以Secar 71水泥为结合剂,加入不同量的纳米CaCO₃,浇注成型后分别经1 200 ℃保温4 h 、1 600 ℃保温4 h热处理,得到弥散型透气砖试样。研究纳米CaCO₃加入量(外加质量分数分别为0、0.5%、1%、1.5%、2%)对浇注料的流动性、弥散型透气砖性能和显微结构的影响。结果表明:1)在加水量一定的情况下,刚玉质浇注料的流动值随纳米CaCO₃外加量的增加而下降;2)随着纳米CaCO₃外加量的增加,经不同温度保温4 h烧后试样的体积密度下降,显气孔率、常温强度、高温抗折强度均升高,透气性能无明显变化;3)经1 600 ℃保温4 h烧后试样的常温物理性能明显优于经1 200 ℃保温4 h烧后试样的;4)纳米CaCO₃外加量(w)为1.5%时,试样的综合性能较优。

关键词: 弥散型透气砖, 流动性, 纳米CaCO₃

Abstract: In order to improve the properties of corundum based dispersive purging plugs,dispersive purging plug specimens were prepared using tabular corundum (1-0.15 mm and ≤0.15 mm) as the aggregates,tabular corundum (≤0.044 mm) and α-Al₂O₃ micropowder (d₅₀=0.6 μm) as the matrix,Secar 71 cement as the binder,introducing different amounts of nano-CaCO₃,casting into shapes,and firing at different temperatures (1 200 ℃ or 1 600 ℃) for 4 h.The effects of the nano-CaCO₃ extra-addition (0,0.5%,1%,1.5%,and 2%,by mass) on the fluidity of castables,the properties and the microstructure of the dispersive purging plug specimens were studied.The results show that:(1)with the fixed water addition,the flow value of the corundum castables decreases as the nano-CaCO₃ addition increases;(2)with the increasing nano-CaCO₃ addition,the bulk density of the specimens fired at different temperatures for 4 h decreases,the apparent porosity,the cold strength and the hot modulus of rupture all increase,the air permeability does not change significantly;(3)the specimens fired at 1 600 ℃ for 4 h have obviously better cold physical properties than those fired at 1 200 ℃ for 4 h;(4)when the nano-CaCO₃ addition is 1.5%,the comprehensive performance of the specimen is the optimal.

Key words: dispersive purging plugs, fluidity, nano-calcium carbonate

中图分类号:

TQ175

苏玉庆, 朱业宁, 郁柏松, 席子建, 魏军从涂军波, 张厚兴, 王义龙. 纳米CaCO₃加入量对刚玉质弥散型透气砖性能的影响[J]. 耐火材料, 2022, 56(6): 467-471.

Su Yuqing, Zhu Yening, Yu Baisong, Xi Zijian, Wei Juncong, Tu Junbo, Zhang Houxing, Wang Yilong. Effect of nano-CaCO₃ addition on properties of corundum based dispersive purging plugs[J]. Refractories, 2022, 56(6): 467-471.

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纳米CaCO₃加入量对刚玉质弥散型透气砖性能的影响

Effect of nano-CaCO₃ addition on properties of corundum based dispersive purging plugs

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