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

作　　者：罗欣 彭妮 连启会 向婉婷 江正迪 黄佳鑫 吴浪[1] Luo Xin;Peng Ni;Lian Qihui;Xiang Wanting;Jiang Zhengdi;Huang Jiaxin;Wu Lang(School of Materials and Chemistry,Southwest University of Science and Technology,Mianyang,Sichuan 621010)

机构地区：[1]西南科技大学材料与化学学院,四川绵阳621010

出　　处：《非金属矿》2024年第4期98-102,共5页Non-Metallic Mines

基　　金：国防基础科研项目(23zg6102)。

摘　　要：为抑制高放废液玻璃固化过程中黄相的形成,采用Ba(NO_(3))_(2)将高放废液中的SO_(4)^(2-)以BaSO_(4)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Na_(2)SO_(4)、BaSO_(4)、Na_(2)MoO_(4)、BaCrO_(4)和Na_(2)CrO_(4),硫分离后的玻璃表面存在少量BaCrO_(4);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%)。To suppress the formation of the yellow phase during vitrification of high-level liquid waste(HLLW),Ba(NO_(3))_(2) was used to separate the SO_(4)^(2-)from the simulated HLLW as BaSO_(4) 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(800-1000℃)without sulfur separation.After sulfur separation,no obvious yellow phase can be observed.The yellow phase is composed of Na_(2)SO_(4),BaSO_(4),Na_(2)MoO_(4),BaCrO_(4) and Na_(2)CrO_(4) before sulfur separation,while the major phase of sample after sulfur separation is BaCrO_(4).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(NO_(3))_(2) 硫分离 

分 类 号：TQ171.9[化学工程—玻璃工业] X771[化学工程—硅酸盐工业]