铝硅系原料种类对钙长石质隔热耐火材料性能的影响

doi:10.3969/j.issn.1001-1935.2023.04.003

耐火材料 ›› 2023, Vol. 57 ›› Issue (4): 286-290.DOI: 10.3969/j.issn.1001-1935.2023.04.003

铝硅系原料种类对钙长石质隔热耐火材料性能的影响

郭会师¹⁾, 杨佳麟¹⁾, 李文凤²⁾, 桂阳海¹⁾, 赵志强¹⁾, 刘应凡¹⁾

1)郑州轻工业大学材料与化学工程学院河南郑州 450051
2)河南工业大学材料科学与工程学院河南郑州 450001

收稿日期:2023-02-01 出版日期:2023-08-15 发布日期:2023-08-30
通讯作者: 李文凤,女,1984年生,博士,副教授。E-mail:wenfeng_li@haut.edu.cn
作者简介:郭会师:男,1984年生,博士,讲师。E-mail:guohuishi@zzuli.edu.cn
基金资助:
国家自然科学基金项目(5180021223,U1904213,U20041102);河南省重点科技攻关项目( 232102231046,232102231051);河南工业大学青年骨干教师培育计划(21421211)。

Effects of Al₂O₃-SiO₂ raw material types on properties of anorthite based insulation refractories

Guo Huishi, Yang Jialin, Li Wenfeng, Gui Yanghai, Zhao Zhiqiang, Liu Yingfan

First author’s address:Department of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450051,Henan,China

Received:2023-02-01 Online:2023-08-15 Published:2023-08-30

摘要/Abstract

摘要： 为优化制备钙长石质隔热耐火材料用铝硅系原料,以绿色无污染的高岭土、蓝晶石、红柱石和硅线石为铝硅系原料,工业CaCO₃为CaO源,采用发泡法结合原位反应烧成工艺,经1 350 ℃保温3 h后获得了钙长石质隔热耐火材料。研究了铝硅系原料种类对合成材料物理性能、物相组成和显微结构的影响。结果表明:不同铝硅系原料所制试样均生成了六边形片状钙长石,并存在少量莫来石和刚玉。试样的体积密度按使用高岭土、红柱石、蓝晶石、硅线石为铝硅系原料的次序依次降低,显气孔率依次升高,热导率依次降低;以高岭土为铝硅系原料所制试样的孔壁中钙长石晶体结合紧密,赋予其较佳的耐压强度,以蓝晶石、红柱石及硅线石为铝硅系原料时,试样的耐压强度依次减小,因为孔壁上钙长石晶体间结合程度逐渐减弱。综合考虑,以蓝晶石为铝硅系原料所制试样的综合性能最佳,其显气孔率、热导率和常温耐压强度分别为84.6%、0.141 W·m^-1·K^-1和1.89 MPa。

关键词: 钙长石质隔热耐火材料, 铝硅系原料, 耐压强度, 热导率, 显微结构

Abstract: In order to optimize their Al₂O₃-SiO₂ raw materials,anorthite based insulation refractories were prepared by the in-situ sintering process combined with the foaming method after sintering at 1 350 ℃ for 3 h,using green and pollution-free kaolin,kyanite,andalusite and sillimanite as Al₂O₃-SiO₂ raw materials,and industrial CaCO₃ as the CaO source.Effects of Al₂O₃-SiO₂ raw material types on the physical properties,phase composition and microstructure were investigated.The results are as follows.All samples prepared by different Al₂O₃-SiO₂ raw materials have hexagonal flake anorthite and a small amount of mullite and corundum.Their bulk density decreases in the order of using kaolin,andalusite,kyanite and sillimanite as the Al₂O₃-SiO₂ raw material,but their apparent porosity increases and their thermal conductivity decreases in this order.Moreover,in the sample with kaolin,the bonding between anorthite crystals on the pore walls is closer than that of the other samples,which is conducive to increasing the compressive strength.The bonding between anorthite crystals on pore walls gradually decreases in the order of using kyanite,andalusite and sillimanite as the Al₂O₃-SiO₂ raw material,thus their compressive strength decreases accordingly.In comprehensive consideration,the properties of the sample from kyanite are the optimal.Its apparent porosity,thermal conductivity and cold compressive strength are 84.6%,0.141 W·m^-1·K^-1 and 1.89 MPa,respectively.

Key words: anorthite based insulation refractories, Al₂O₃-SiO₂ raw materials, compressive strength, thermal conductivity, microstructure

中图分类号:

TQ175

郭会师, 杨佳麟, 李文凤, 桂阳海, 赵志强, 刘应凡. 铝硅系原料种类对钙长石质隔热耐火材料性能的影响[J]. 耐火材料, 2023, 57(4): 286-290.

Guo Huishi, Yang Jialin, Li Wenfeng, Gui Yanghai, Zhao Zhiqiang, Liu Yingfan. Effects of Al₂O₃-SiO₂ raw material types on properties of anorthite based insulation refractories[J]. Refractories, 2023, 57(4): 286-290.

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铝硅系原料种类对钙长石质隔热耐火材料性能的影响

Effects of Al₂O₃-SiO₂ raw material types on properties of anorthite based insulation refractories

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铝硅系原料种类对钙长石质隔热耐火材料性能的影响

Effects of Al2O3-SiO2 raw material types on properties of anorthite based insulation refractories

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Effects of Al₂O₃-SiO₂ raw material types on properties of anorthite based insulation refractories