化工环保2025，Vol.45Issue(2)：268-274,7.DOI:10.3969/j.issn.1006-1878.2025.02.015
利用粉煤灰和水泥固化脱硫废水的研究
Solidification of desulfurization wastewater by fly ash and cement
韦飞 1谢云驾 2王特 1王梦勤 1盛广宏 2贾勇2
作者信息
- 1. 国电环境保护研究院有限公司,江苏 南京 210003
- 2. 安徽工业大学 能源与环境学院,安徽 马鞍山 243002
- 折叠
摘要
Abstract
The desulfurization wastewater was used as mixing water to prepare solidified material with sand,fly ash and cement as raw materials.The effects of the proportion of raw materials and briquetting pressure on the compressive strength of the solidified material were investigated.The leaching characteristics of Cl-,SO42-,and heavy metal ions in the solidified material were studied,and the frost resistance of the solidified material was evaluated.The results show that when the mass fraction of sand,fly ash,and cement is 50%,30%,and 20%,respectively,the mass ratio of desulfurization wastewater to solid materials is 13%,and the briquetting pressure is 20 MPa;the unconfined compressive strength of the sample after curing for 28 days is 85.1 MPa,and the leaching rates of Cl-and SO42-are 12.62%and 14.27%,respectively.The leaching concentration of Mn,Zn,Co,and Ni meets the limitation in GB 3838-2002,and the compressive strength remains at 71.0%after freeze-thaw cycles.The characterization results show that the sample contains a large number of retiform C-S-H gel,rod-like ettringite(AFt),and Friedel's salt.Among them,the formation of AFt is conducive to the solidification of SO42-and heavy metal ions,while the formation of Friedel's salt is conducive to the solidification of both Cl-and heavy metal ions.关键词
脱硫废水/Friedel's盐/氯离子/固化/浸出Key words
desulfurization wastewater/Friedel's salt/chloride ion/solidification/leaching分类
资源环境引用本文复制引用
韦飞,谢云驾,王特,王梦勤,盛广宏,贾勇..利用粉煤灰和水泥固化脱硫废水的研究[J].化工环保,2025,45(2):268-274,7.
