煅烧温度对低品位黏土物相和结构的影响

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (4): 1309-1314.

所属专题：资源综合利用

煅烧温度对低品位黏土物相和结构的影响

孙悦¹, 刘小青¹, 何峰^1,2, 邓玉华³, 李润国³, 张超³, 郑现明³, 谢峻林^1,2

1.武汉理工大学硅酸盐建筑材料国家重点实验室,武汉 430070;
2.北京工业大学材料与制造学部,北京 100124;
3.中材建设有限公司,北京 100176

收稿日期:2022-11-18 修订日期:2023-02-15 出版日期:2023-04-15 发布日期:2023-04-25
通信作者: 刘小青,博士,教授级高级实验师。E-mail:lczr@whut.edu.cn
作者简介:孙悦(1999—),女,硕士研究生。主要从事绿色建筑材料的研究。E-mail:1615146583@qq.com
基金资助:
中材建设有限公司科技研发项目(CBMI-EN-220302-2)

Effect of Calcination Temperature on Phase and Structure of Low-Grade Clay

SUN Yue¹, LIU Xiaoqing¹, HE Feng^1,2, DENG Yuhua³, LI Runguo³, ZHANG Chao³, ZHENG Xianming³, XIE Junlin^1,2

1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China;
2. Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China;
3. CBMI Construction Co., Ltd., Beijing 100176, China

Received:2022-11-18 Revised:2023-02-15 Online:2023-04-15 Published:2023-04-25

摘要/Abstract

摘要： 利用DSC-TG、XRD、IR、Raman和NMR等测试手段,研究了不同煅烧温度(650、700、750、800、850 ℃)下低品位黏土物相和结构的变化。结果表明:低品位黏土主要由高结晶度的石英组成,并含有少量晶化程度较低的多硅白云母、高岭石、伊利石、方解石、黄铁矿和微斜长石。650~850 ℃高温煅烧后,高岭石和伊利石分解为非晶的SiO₂和Al₂O₃,部分石英转变为无定形的SiO₂;低品位黏土矿物中的吸附水和结构水分解,铝氧八面体逐渐转变为铝氧四面体,石英中Si—O—Si的近程有序结构也受到了一定程度的破坏。

关键词: 低品位黏土, 煅烧温度, 物相组成, 结构变化, 非晶化

Abstract: The changes of phase and structure of low-grade clay at different calcination temperatures (650, 700, 750, 800, 850 ℃) were studied by DSC-TG, XRD, IR, Raman and NMR. The results show that the low-grade clay is mainly composed of quartz with high crystallinity, and contains a small amount of phengite, kaolinite, illite, calcite, pyrite and microcline with low crystallinity. After calcination at 650~850 ℃, kaolinite and illite decompose into amorphization SiO₂ and Al₂O₃, and some quartz transform into amorphous SiO₂. The adsorbed water and the structure water in the low-grade clay decompose, the aluminoxy octahedron gradually transforms into aluminoxy tetrahedron, and the short-range order structure of Si—O—Si in quartz is also destroyed to a certain extent.

Key words: low-grade clay, calcination temperature, phase composition, structural change, amorphization

中图分类号:

TD985

孙悦, 刘小青, 何峰, 邓玉华, 李润国, 张超, 郑现明, 谢峻林. 煅烧温度对低品位黏土物相和结构的影响[J]. 硅酸盐通报, 2023, 42(4): 1309-1314.

SUN Yue, LIU Xiaoqing, HE Feng, DENG Yuhua, LI Runguo, ZHANG Chao, ZHENG Xianming, XIE Junlin. Effect of Calcination Temperature on Phase and Structure of Low-Grade Clay[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(4): 1309-1314.

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煅烧温度对低品位黏土物相和结构的影响

Effect of Calcination Temperature on Phase and Structure of Low-Grade Clay

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