湖泥与稻壳混烧及灰渣资源化研究

摘要

Aiming at the treatment problem of dredged sludge and rice husk,this paper studies the co-combustion ash of dredged sludge and rice husk,mainly the environmental hazards of the ash and compressive strength of solidified body.The results show that heavy metals (Cu,Fe,Mn,Zn)leaching concentration from the ash below the threshold of the groundwater Ⅲ level standard (except for Mn).In a certain range (less than 50%),the compressive strength of the solidified body is better than that of the pure cement.After the solidification,concentration of heavy metals from solidi-fied body is reduced further.%针对湖泥与稻壳处理处置的问题,该文对湖泥与稻壳的混烧灰渣的环境危害及水泥体抗压强度进行了研究。结果表明,混烧灰渣中的重金属(Cu,Fe,Mn,Zn)的浸出浓度在我国地下水三级标准的阈值范围内(除了 Mn)。且混烧灰在一定范围内(小于50%)替代水泥所得固化体的抗压强度要优于纯水泥。对混烧灰经过固化后,重金属浸出浓度进一步地减少。