冶金渣基胶凝材料固化生活垃圾焚烧飞灰的性能研究  

Solidification of Municipal Solid Waste Incineration Fly Ash with Metallurgically Based Cementitious Materials

作　　者：许伟航 傅平丰[1] 方贵稳 王亮华 XU Weihang;FU Pingfeng;FANG Guiwen;WANG Lianghua(School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学土木与资源工程学院,北京100083

出　　处：《矿产保护与利用》2021年第3期10-16,共7页Conservation and Utilization of Mineral Resources

基　　金：国家重点研发计划项目(2018YFC1900604);中央高校基本科研业务费专项资金资助项目(FRF-MP-20-21)。

摘　　要：以矿渣、钢渣、脱硫灰和磷酸淤渣为原材料,优化4种原料的配合比,制备出冶金渣基胶凝材料,考察其对垃圾焚烧飞灰中重金属的固化性能。结果表明:当m(矿渣):m(钢渣):m(脱硫灰):m(磷酸淤渣)=36%:32%:12%:20%时,冶金渣基胶凝材料净浆试块的抗压强度达35.2 MPa。随着垃圾焚烧飞灰掺入量从10%增加到80%,固化体的强度不断下降;但是,当垃圾焚烧飞灰掺量高达到80%时,固化体抗压强度仍达2.2 MPa,Pb、Zn、Cr、Hg和As的固化率仍超过99%,垃圾焚烧飞灰固化体的抗压强度和重金属浸出浓度均满足《生活垃圾卫生填埋场污染控制标准(GB 16889—2008)》的要求。The metallurgically based cementitious materials were prepared by optimizing the mass ratio of blast furnace slag,steel slag,desulfurization ash and phosphoric acid sludge.The immobilization performances of heavy metals in Municipal Solid Waste Incineration(MSWI)fly ash were evaluated by using metallurgically based cementitious materials as binding agent.The results showed that the compressive strength of cement paste for metallurgically based cementitious materials reached 35.2 MPa with the mass ratio of blast furnace slag,steel slag,desulfurization ash and phosphoric acid sludge of 36%:32%:12%:20%.When the mixing ratio of MSWI fly ash increased from 10%to 80%,the compressive strength of solidified matrix decreased gradually.However,while the mixing ratio of MSWI fly ash was as high as 80%,the compressive strength of solidified matrix still reached 2.2 MPa,and the immobilization rates of Pb,Zn,Cr,Hg and As were higher than 99%.The leaching concentration of heavy metals and the compressive strength of solidified matrix well met the requirements of《Standard for Pollution Control on the Landfill Site of Municipal Solid Waste(GB 16889-2008)》.

关 键 词：冶金渣基胶凝材料 垃圾焚烧飞灰 脱硫灰 磷酸淤渣 重金属固化 

分 类 号：X756[环境科学与工程—环境工程]