摘要
一、前言我院低放废水处理车间用化学凝聚法产生的化学沉淀泥浆(以下简称泥浆),主要含有氢氧化铁体及磷酸钙沉淀,含水量达90%以上。水泥固化前,脱水减容是重要一环。泥浆先经冻结,然后融化,再行分离脱水的工艺过程称为冻融法。把它作为水泥固化前的预处理手段,可以减少最终固化体的体积。为此,对冻融后自然沉降脱水预处理予以研究。
The technological condition and process for the dehydration of chemical sludge with water content over 90% are studied by means of freeze-thaw method. The freezing point, precipitation behaviour and volume reducing ratio of the sludge are measured. The results show that the precipitation property of freeze-thaw sludge is better than that of non-freeze-thaw sludge. For the sludge with solid content (3—4)%(m/m), the volume reducing ratio is higher than 5 after freeze-thaw processing. The quickly dewatering effect and characteristics of the actual radioactive sludge freezed by liquid nitrogen are also studied.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
1992年第6期66-70,共5页
Atomic Energy Science and Technology
关键词
冻融法
放射性废物
废物处理
脱水
Radioactive chemical sludge, Freeze-thaw method, Volume reducing ratio.
