硫分离对模拟高放玻璃固化体黄相形成的影响
Effect of Sulfur Separation on the Formation of Yellow Phase during Vitrification of High-Level Liquid Waste Glass
罗欣 1彭妮 1连启会 1向婉婷 1江正迪 1黄佳鑫 1吴浪1
作者信息
- 1. 西南科技大学 材料与化学学院,四川 绵阳 621010
- 折叠
摘要
为抑制高放废液玻璃固化过程中黄相的形成,采用Ba(NO3)2 将高放废液中的SO42-以BaSO4 沉淀形式分离后,再采用熔融法制备硼硅酸盐玻璃固化体,探究硫分离对玻璃体熔制过程中黄相形成的影响.结果表明,对于模拟废液掺量为20%的样品,硫分离前在800～1 000℃范围内黄相的量随温度升高逐渐增多,硫分离后则未观察到黄相.硫分离前的黄相主要成分为Na2SO4、BaSO4、Na2MoO4、BaCrO4 和Na2CrO4,硫分离后的玻璃表面存在少量BaCrO4;硫分离后废物包容量28%时仍未观察到黄相,显著高于硫分离前的废物包容量(＜16%).
Abstract
To suppress the formation of the yellow phase during vitrification of high-level liquid waste(HLLW),Ba(NO3)2 was used to separate the SO42-from the simulated HLLW as BaSO4 precipitation,and then borosilicate waste glass was prepared by the traditional melting method.The effect of sulfur separation on the formation of yellow phase during vitrification was mainly investigated.The results show that for the sample with 20%simulated HLLW,the amount of yellow phase increases gradually with increasing temperature during vitrification process(800-1 000℃)without sulfur separation.After sulfur separation,no obvious yellow phase can be observed.The yellow phase is composed of Na2SO4,BaSO4,Na2MoO4,BaCrO4 and Na2CrO4 before sulfur separation,while the major phase of sample after sulfur separation is BaCrO4.Moreover,no obvious yellow phase is observed after sulfur separation for the waste glass with 28%content of simulated HLLW,which is higher than that of the sample(＜16%)without sulfur separation.
关键词
硼硅酸盐玻璃/高放废液/黄相/Ba(NO3)2/硫分离Key words
borosilicate glass/high-level liquid waste/yellow phase/Ba(NO3)2/sulfur separation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据