Recycling of municipal solid waste incinerator fly ash by using hydrocyclone separation

被引:26
作者
Ko, Ming-Sheng [1 ]
Chen, Ying-Liang [2 ]
Wei, Pei-Shou [1 ]
机构
[1] Natl Taipei Univ Technol, Dept Mat & Mineral Resources Engn, Taipei 10608, Taiwan
[2] Natl Cheng Kung Univ, Sustainable Environm Res Ctr, Tainan 70101, Taiwan
关键词
Municipal solid waste incinerator fly ash; Hydrocyclone; Chlorides; Heavy metals; Physical separation; Leaching; REMOVAL; SPECIATION; METALS; ZINC; LEAD;
D O I
10.1016/j.wasman.2012.10.009
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The municipal solid waste incinerators (MSWIs) in Taiwan generate about 300,000 tons of fly ash annually, which is mainly composed of calcium and silicon compounds, and has the potential for recycling. However, some heavy metals are present in the MSWI fly ash, and before recycling, they need to be removed or reduced to make the fly ash non-hazardous. Accordingly, the purpose of this study was to use a hydrocyclone for the separation of the components of the MSWI fly ash in order to obtain the recyclable portion. The results show that chloride salts can be removed from the fly ash during the hydrocyclone separation process. The presence of a dense medium (quartz sand in this study) is not only helpful for the removal of the salts, but also for the separation of the fly ash particles. After the dense-medium hydrocyclone separation process, heavy metals including Pb and Zn were concentrated in the fine particles so that the rest of the fly ash contained less heavy metal and became both non-hazardous and recyclable. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:615 / 620
页数:6
相关论文
共 23 条
[1]   A study of Cr(VI) in ashes from fluidized bed combustion of municipal solid waste: leaching, secondary reactions and the applicability of some speciation methods [J].
Abbas, Z ;
Steenari, BM ;
Lindqvist, O .
WASTE MANAGEMENT, 2001, 21 (08) :725-739
[2]   Chloride removal from recycled cooling water using ultra-high lime with aluminum process [J].
Abdel-Wahab, A ;
Batchelor, B .
WATER ENVIRONMENT RESEARCH, 2002, 74 (03) :256-263
[3]  
American Society for Testing and Materials (ASTM), 2008, D6683 ASTM
[4]   Classification studies of lead-zinc ore fines using water-injection cyclone [J].
Bhaskar, KU ;
Govindarajan, B ;
Barnwal, JP ;
Rao, KK ;
Gupta, BK ;
Rao, TC .
INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 2005, 77 (02) :80-94
[5]   Friedel's salt, Ca2Al(OH)6(Cl,OH)•2H2O:: Its solid solutions and their role in chloride binding [J].
Birnin-Yauri, UA ;
Glasser, FP .
CEMENT AND CONCRETE RESEARCH, 1998, 28 (12) :1713-1723
[6]  
Bradley D., 1965, The Hydrocyclone
[7]   Performance characteristics for particles of sand FCC and fly ash in a novel hydrocyclone [J].
Dwari, RK ;
Biswas, MN ;
Meikap, BC .
CHEMICAL ENGINEERING SCIENCE, 2004, 59 (03) :671-684
[8]   Removal of hazardous metals from MSW fly ash-An evaluation of ash leaching methods [J].
Fedje, Karin Karlfeldt ;
Ekberg, Christian ;
Skarnemark, Gunnar ;
Steenari, Britt-Marie .
JOURNAL OF HAZARDOUS MATERIALS, 2010, 173 (1-3) :310-317
[9]   The analytical characterization of municipal solid waste incinerator fly ash: methods and preliminary results [J].
Fermo, P ;
Cariati, F ;
Pozzi, A ;
Demartin, F ;
Tettamanti, M ;
Collina, E ;
Lasagni, M ;
Pitea, D ;
Puglisi, O ;
Russo, U .
FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY, 1999, 365 (08) :666-673
[10]   Possible applications for municipal solid waste fly ash [J].
Ferreira, C ;
Ribeiro, A ;
Ottosen, L .
JOURNAL OF HAZARDOUS MATERIALS, 2003, 96 (2-3) :201-216