Effects of Municipal Sewage Sludge on Fixation of Cr,Ni,Cu,and Zn during Co-processing of Heavy Metal-containing Waste in Cement Kilns  

作　　者：刘伟 CAO Haihua 徐竟成 LIU Jia HUANG Juwen HUANG Xiangfeng LI Guangming 

机构地区：[1]College of Environmental Science and Engineering,State Key-Laboratory of Pollution Control and Resource Reuse,Key Laboratory of Yangtze River Water Environment of Education Ministry,Tongji University,Shanghai 200092,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2018年第4期892-900,共9页武汉理工大学学报（材料科学英文版）

基　　金：the National Major Science and Technology Project of Water Pollution Control and Management,China(No.2010ZX07319-001-02)

摘　　要：Cement raw meal with MSS and different heavy metals was blended to examine the fixation ratios, chemical species, and cement crystalline phases in clinkers. The results showed that blending MSS could decrease the fixation ratio of Cr, Ni, Cu, and Zn in the produced clinker by 5% to 25%. And Cr, Cu, and Zn were mainly incorporated into clinkers as metal silicates, Ni was mainly solubilized in Mg O to form magnesium nickel oxides, and the transition phases were mainly metal aluminum oxides as indicated by X-ray diffraction. The reduction of fixation ratios was likely attributed to the presence of impure elements, such as sodium and phosphorus in MSS. In addition, high concentrations（eg, 1.7 wt%） of chlorine in MSS led to metal chloride formation that could vaporize Cu, Cr, Ni, and Zn. To summarize, introducing MSS would decrease the fixation ratios of heavy metals due to the presence of impure elements, such as sodium and phosphorus and chlorine.Cement raw meal with MSS and different heavy metals was blended to examine the fixation ratios, chemical species, and cement crystalline phases in clinkers. The results showed that blending MSS could decrease the fixation ratio of Cr, Ni, Cu, and Zn in the produced clinker by 5% to 25%. And Cr, Cu, and Zn were mainly incorporated into clinkers as metal silicates, Ni was mainly solubilized in Mg O to form magnesium nickel oxides, and the transition phases were mainly metal aluminum oxides as indicated by X-ray diffraction. The reduction of fixation ratios was likely attributed to the presence of impure elements, such as sodium and phosphorus in MSS. In addition, high concentrations（eg, 1.7 wt%） of chlorine in MSS led to metal chloride formation that could vaporize Cu, Cr, Ni, and Zn. To summarize, introducing MSS would decrease the fixation ratios of heavy metals due to the presence of impure elements, such as sodium and phosphorus and chlorine.

关 键 词：municipal sewage sludge heavy-metal fixation cement kiln CO-PROCESSING 

分 类 号：TQ172.62[化学工程—水泥工业] X703[化学工程—硅酸盐工业]