高岭土高温固化法去除废槽衬含氟废物中的氟  

Removal of Fluorine from Fluorine Containing Waste Lining by High Temperature Solidification of Kaolin

作　　者：王智鹏[1] 林晔 安欣 WANG Zhipeng;LIN Ye;AN Xin(Beijing Research Institute of Chemical Engineering and Metallurgy,CNNC,Beijing 101149,China;School of Municipal and Environmental Engineering,Shenyang Jianzhu University,Shenyang 110168,China)

机构地区：[1]核工业北京化工冶金研究院,北京101149 [2]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168

出　　处：《湿法冶金》2023年第3期296-301,共6页Hydrometallurgy of China

摘　　要：研究了用高岭土(KLT)在高温条件下固化处理含氟危险废物废槽衬侧部块,通过响应曲面法优化了试验参数,考察了优化条件下的除氟效果。利用SEM、XRD对除氟后废物的结构和形态进行表征,探讨了KLT固化处理含氟废物的机制。结果表明:针对10 g侧部块含氟危险废物,在焙烧温度912℃、焙烧时间175 min、KLT添加量25 g最优条件下,氟平均去除率可达98.47%,除氟后侧部块中氟浓度低于国家标准(GB 5085.3—2007),氟被结合到硅酸盐网格上,含氟危险废物可得到无害化处置。Kaolin(KLT)was used to solidify and treat the side blocks of the waste tank lining of fluorine-containing hazardous waste at high temperature.The test parameters were optimized by response surface method.The effects of defluoridation under the optimized conditions were investigated.The structure and morphology of the waste after defluoridation were characterized by SEM and XRD,and the mechanism of KLT solidifying and treating fluorine-containing waste was discussed.The results show that under the optimal conditions of roasting temperature of 912℃,roasting time of 175 min,and KLT addition of 25 g,the average fluorine removal rate can reach 98.47%for 10 g of side-block fluorine-containing hazardous waste.The fluorine concentration in the treated side blocks is lower than the national standard GB 5085.3—2007.The fluorine is combined with the silicate grid,and the fluorine-containing hazardous waste is disposed innocuously.

关 键 词：高岭土 固化 废槽衬 优化 氟 去除 

分 类 号：TF803.25[冶金工程—有色金属冶金] X705[环境科学与工程—环境工程]