模拟高放废液玻璃固化体析晶性能研究

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (10): 3516-3522.

模拟高放废液玻璃固化体析晶性能研究

孟保健¹, 朱永昌¹, 焦云杰¹, 赵崇¹, 万伟^1,2, 韩勖¹, 崔竹¹, 杨德博¹

1.中国建筑材料科学研究总院有限公司,北京 100024;
2.西南科技大学材料科学与工程学院,环境友好能源材料国家重点实验室,绵阳 621900

收稿日期:2021-04-25 修回日期:2021-05-08 出版日期:2021-10-15 发布日期:2021-11-11
通讯作者: 朱永昌,博士,教授。E-mail:zhuyongchang@cbmamail.com.cn
作者简介:孟保健(1995—),男,硕士研究生。主要从事特种玻璃的性能和放射性废物安全性处置研究。E-mail:645332661@qq.com

Crystallization Performance of Simulated High-Level Waste Glasses

MENG Baojian¹, ZHU Yongchang¹, JIAO Yunjie¹, ZHAO Chong¹, WAN Wei^1,2, HAN Xu¹, CUI Zhu¹, YANG Debo¹

1. China Building Materials Academy, Beijing 100024, China;
2. State Key Laboratory of Environmentally-friendly Energy Materials,School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621900, China

Received:2021-04-25 Revised:2021-05-08 Online:2021-10-15 Published:2021-11-11

摘要/Abstract

摘要： 以焦耳炉生产的含16%(质量分数)模拟高放废液(HLW)的硼硅酸盐玻璃固化体作为实验材料,研究了玻璃固化体在不同热处理温度下的析晶行为和热稳定性。结果表明:部分固化体在实际生产和储存过程中内部已经出现辉石晶相,已析晶玻璃的活化能较未析晶玻璃低40~60 kJ/mol;热处理试验证实辉石相在700~900 ℃内析出,同时随结晶度的增加玻璃固化体的表观颜色也发生变化。研究析晶与热历史之间的相关性有助于预测高放废物玻璃中结晶相的产生,研究结果可为焦耳炉固化工艺的进一步控制提供理论依据。

关键词: 模拟高放废液, 玻璃固化体, 析晶行为, 热稳定性, 辉石

Abstract: The simulated high-level waste (HLW) glass containing 16% (mass fraction) nuclear waste was prepared by the Joule-heated, ceramic-lined melter. In this work, the crystallization behavior and thermal stability of waste glass under different heating temperatures were investigated. The results show that some of the waste glass in the actual production and storage process has appeared diopside phase, and the crystallization activation energy of the crystal glass is lower than the waste glass 40 kJ/mol to 60 kJ/mol. Upon heat treatment the glass at 700 ℃ to 900 ℃ develops diopside phase and the apparent color of nuclear waste glass also changes with the increase of crystallinity. Correlation between crystallization and thermal history can facilitate a more realistic prediction of crystallization in waste glass. The results of this initial study provide a theoretical guidance for the operational plant parameters for HLW glass manufacture.

Key words: simulated high level waste, waste glass, crystallization behavior, thermal stability, diopside

中图分类号:

TQ171

孟保健, 朱永昌, 焦云杰, 赵崇, 万伟, 韩勖, 崔竹, 杨德博. 模拟高放废液玻璃固化体析晶性能研究[J]. 硅酸盐通报, 2021, 40(10): 3516-3522.

MENG Baojian, ZHU Yongchang, JIAO Yunjie, ZHAO Chong, WAN Wei, HAN Xu, CUI Zhu, YANG Debo. Crystallization Performance of Simulated High-Level Waste Glasses[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(10): 3516-3522.

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