模拟高盐高碱低中水平放射性废液水泥固化工艺的研究

辐射防护 ›› 2014, Vol. 34 ›› Issue (4): 218-223.

模拟高盐高碱低中水平放射性废液水泥固化工艺的研究

高亚, 李玉香, 马雪, 吴浪, 吴江

四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地,西南科技大学,四川绵阳 621010

收稿日期:2014-01-21 出版日期:2014-07-20 发布日期:2025-01-10
通讯作者: 李玉香。E-mail:liyuxiang@swust.edu.cn
作者简介:高亚(1986—),女,2011年6月毕业于西南科技大学材料科学与工程学院材料科学与工程专业,现为西南科技大学材料科学与工程学院材料学专业硕士研究生。E-mail:451299229@qq.com
基金资助:
核设施退役及放射性废物治理工程科研项目;江苏省生态环境材料重点建设实验室开放课题资助(EML201203) 。

Cement Solidification of Simulated High Saline-alkali Low and Intermediate-low Level Radioactive Liquid Waste

Gao Ya, Li Yuxiang, Ma Xue, Wu Lang, Wu Jiang

Southwest University of Science and Technology,Sichuan Mianyang 621010

Received:2014-01-21 Online:2014-07-20 Published:2025-01-10

摘要/Abstract

摘要： 针对高盐高碱低中水平放射性废液的特性,通过在普通硅酸盐水泥中掺入矿渣粉、粉煤灰和沸石作为矿物掺合料进行优化,获得固溶度大、低泌水率、流动性好、低核素浸出率的工艺配方,着重研究了水泥基材料组成、液灰比、盐浓度和促凝剂对扩展流动度、泌水率、凝结时间的影响规律。研究结果表明:矿物掺合料替代部分水泥可以发挥火山灰效应、减水效应,从而提高固化体对废液的包容量,改善拌合物的泌水、盐析现象;矿渣粉和粉煤灰有利于获得较高流动度的水泥拌合物,沸石可显著延长拌合物的凝结时间;随着高盐高碱低中水平放射性废液盐浓度的增加,扩展流动度减小,泌水率减小,凝结时间延长;三乙醇胺能有效缩短水泥固化的施工作业时间,掺量为1%时,PSFZ配方拌合物的初凝时间为262 min,终凝时间为302 min,可以满足施工作业要求。

关键词: 水泥基固化体, 模拟核废液, 工艺参数

Abstract: By adding slag, fly ash and zeolite as mineral admixture modifying the ordinary Portland cement, a process recipe of big solid solubility, low exudation rate, good flow ability and low nuclide leaching rate was obtained. Influences of material composition, liquid-cement ratio, salt concentration and coagulant over extended fluidity, bleeding rate and setting time were investigated. Results show that: use mineral admixtures instead of cement can exert pozzolanic effect and water-reducing effect, improving the waste liquid capacity and bleeding and salting-out of the solidification form; the slag and fly ash can improve the fluidity of paste, zealot significantly prolong the setting time; As the salt concentration increases, the expansion of fluidity and bleeding rate decreases, the setting time extends; Triethanolamine can effectively shorten the construction of cement solidification time. When the content is 1%, setting time of PSFZ shortened to 4 h 22 min , final setting time shortened to 5 h 2 min, satisfies the requirement of national standard.

Key words: cement solidification form, simulated nuclear liquid waste, parameters

中图分类号:

TL941+.111

高亚, 李玉香, 马雪, 吴浪, 吴江. 模拟高盐高碱低中水平放射性废液水泥固化工艺的研究[J]. 辐射防护, 2014, 34(4): 218-223.

Gao Ya, Li Yuxiang, Ma Xue, Wu Lang, Wu Jiang. Cement Solidification of Simulated High Saline-alkali Low and Intermediate-low Level Radioactive Liquid Waste[J]. RADIATION PROTECTION, 2014, 34(4): 218-223.

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