Quantification and distribution of extractable metals of MSWI bottom ash in view of its valorization in China
作者机构：Institute of Thermal and Power EngineeringZhejiang University of TechnologyLiuhe Road 28#HangZhou310023China Jiaxing New Jies Heat&Power Company LimitedQiumao Road 55#Jiaxing314016China Zhejiang Eco Environmental Technology Company LimitedQufu Road 1188#Huzhou313000China
出 版 物：《Waste Disposal and Sustainable Energy》 (废弃物处置与可持续能源（英文）)
年 卷 期：2022年第4卷第3期
页 面：169-178页
核心收录：
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：the project of the National Natural Science Foundation(Grant No.52170141) Key Research and Development Program of Zhejiang Province(Grant No.2021C03164,No.2022C03092),providing financial support for this work
主 题：Municipal solid waste incineration Bottom ash Extractable metals Particle size
摘 要：Metal recovery from bottom ash was deemed to be significant to achieve a higher stability of bottom ash and recycle valuable extractable *** China,the existing rugged industrial production ignores the actual metal distribution and thus fails to exploit the utilization potential of recoverable metals in bottom *** on these findings,this work was proposed to obtain a comprehensive and in-depth study on the recoverability of metals in bottom ***,the particle size distribution and elemental composition of the bottom ash were ***,complete information on the recoverable metals in bottom ash fractions with different sizes was obtained by washing,sorting,crushing,density separation and XRF(X Ray Fluorescence)*** results showed that the smaller than 5 mm fraction accounted for up to 60%of the bottom ash,and the 5–20 mm fractions accounted for about 15%.The material characterization revealed that the contents of recoverable Fe,stainless steel,Al and Cu in bottom ash were averagely 9.01%,0.136%,0.78%and 0.08%,*** 50%of Fe,68%of Al,61%of Cu,and 22%of stainless steel were distributed in smaller than 10 mm ***,Fe was evenly distributed among 0–2 mm,2–5 mm,5–10 mm fractions,and the content was between 5.41%and 7.5%.Non-magnetic stainless steel was mainly distributed in 20–40 mm and larger than 40 mm *** highest share of Al was present in the fractions between 5 mm and 20 mm,accounting for 48%of the total *** 45.6%of the Cu was enriched in the 5–10 mm ***,the Zn content was less than 0.01%.This work provides an in-depth understanding and information on metal recovery as well as promisingly guide ash utilization.
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