高炉水淬废渣混凝土性能及重金属浸出毒性研究  

Heavy Metals Leaching Toxicity and Concrete Performance of Water-Quenched Blast Furnace Slag after Adsorption

作　　者：王哲[1,2] 张思思[1] 黄国和[2] 安春江[3] 陈莉荣[1] 余维佳 

机构地区：[1]内蒙古科技大学能源与环境学院,包头014010 [2]华北电力大学环境研究院,区域能源系统优化教育部重点实验室,北京102206 [3]能源、环境和可持续发展研究所,里贾纳大学,加拿大萨斯喀彻温省S4S0A2 [4]包头市辐射环境管理处,包头014060

出　　处：《硅酸盐通报》2016年第7期2083-2088,共6页Bulletin of the Chinese Ceramic Society

基　　金：教育部重点项目(311013)

摘　　要：吸附完废水的高炉水淬废渣含有大量的重金属,其中Cd2+超过国家固体废弃物排放最高允许值,属于危险废物。因此,为有效控制高炉水淬废渣中重金属污染,采用不同废渣取代率设计不同配合比的炉渣混凝土,研究取代率对炉渣混凝土工作性能的影响,同时采用美国EPA毒性浸出实验(TCLP)和固化体表面浸出实验对高炉水淬废渣混凝土固化体的浸出毒性进行安全性评定。结果表明,掺加高炉水淬废渣可以使炉渣混凝土流动性变大,后期抗压强度增长显著,完全达到了C30混凝土的要求。高炉水淬废渣混凝土固化体最大浸出毒性满足国家固体废弃物排放标准。此外,固化体早期表面浸出率为10-3数量级,后期表面浸出率仅为10-6数量级,可见固化体的长期抗浸出能力是很强的,废渣中的重金属离子得到有效的束缚和稳定固化,既解决了环境问题,又为高炉水淬渣产业化发展开辟了新的途径。There were a large amount of heavy metal in the used water-quenched blast furnace slag （WBFS） after adsorption, among them Cd2＋ exceeded identification standard for hazardous wastes of China, so the slag belonged to the hazardous waste, and also it would bring secondary pollution and waste of resources. In order to control the pollution of heavy metal effectively, the concrete with different replacement rates of the used WBFS was investigated. The effect of the used WBFS on the workability of concrete was analyzed. In this study, the security assessment was also performed through two leaching methods, Toxicity Characteristic Leaching Procedure （TCLP） and surface leaching experiment of solidified body. The results showed that it could not only improve concrete mobility but also increase long term compressive strength, which satisfied the demand of C30 concrete. The concentration of heavy metals in the condensates leachate is less than identification standard for hazardous wastes of China. Inthe early time of leaching, the leaching rate of heavy metal in consolidated body was a little high, up to 10^-3, in the later time of leaching, its rate greatly declined, down to 10^-6. It could be seen that the resistance of the consolidated body to leaching was high. Heavy metals were stabilized and solidified in the condensations. This solidification technology solved the environmental problem and would develop a new approach to WBFS industrialization.

关 键 词：高炉水淬废渣 重金属 混凝土 浸出毒性 

分 类 号：TU528[建筑科学—建筑技术科学]