摘要
以武汉市东湖淤泥作主要原料,通过向淤泥中掺入Fe_2O_3粉末,制备出一种膨胀性能良好的淤泥超轻功能陶粒基体。实验结果证明,Fe_2O_3粉末可以有效提高陶粒的膨胀率,调控陶粒的孔结构。在Fe_2O_3粉末掺量3%、焙烧温度1 150℃、焙烧时间20 min、预烧温度600℃、预烧时间10 min的条件下制得表观密度为0.394g/cm^3、吸水率为13.89%、显孔隙率为5.47%的淤泥超轻陶粒。Fe_2O_3粉末的掺入增加了陶粒内部孔隙的生成,并且形成了更多的连通孔隙,有利于功能组分的负载以及污染物的处理。
Photo catalytic functional ceramsite is a new way for sludge application.In this paper,ultra-lightweight functional ceramsite was synthesized by adding Fe_2O_3 powder into the sludge taken from Wuhan east lake.The experimental results suggest that the expansion of ultra-lightweight ceramsite can be improved significantly as Fe_2O_3 powder can take control of pore structure of ceramsite.The ultra-lightweight ceramsite was prepared with appropriate sintering process（calcination temperature 1 150 ℃,calcination time 20 min,baking temperature 600 ℃,baking time 10 min）when the Fe_2O_3 powder content is 3%.The ceramsite properties are as follows：apparent density of 0.394g/cm^3,the water absorption rate of 13.89%,and the apparent porosity of 5.47%.With the TG/DSC,SEM,XRF analysis for raw materials and ceramsite,Fe_2O_3 powder increases the generation of ceramsite pores and creates more intercommunicating pores,which will increase the water absorption of ceramsite effectively.This study shows bright prospect of function application of ceramsite.
出处
《武汉理工大学学报》
CAS
北大核心
2015年第12期23-27,共5页
Journal of Wuhan University of Technology
基金
国家财政部施工新技术研究与开发项目(财企[2013]235号)
关键词
超轻功能陶粒
淤泥
膨胀机理
ultra-lightweight ceramsite
sludge
expansion mechanism
