Aluminium alloys in municipal solid waste incineration bottom ash.
With the increasing growth of incineration of household waste, more and more aluminium is retained in municipal solid waste incinerator bottom ash. Therefore recycling of aluminium from bottom ash becomes increasingly important. Previous research suggests that aluminium from different sources is found in different size fractions resulting in different recycling rates. The purpose of this study was to develop analytical and sampling techniques to measure the particle size distribution of individual alloys in bottom ash. In particular, cast aluminium alloys were investigated. Based on the particle size distribution it was computed how well these alloys were recovered in a typical state-of-the-art treatment plant. Assessment of the cast alloy distribution was carried out by wet physical separation processes, as well as chemical methods, X-ray fluorescence analysis and electron microprobe analysis. The results from laboratory analyses showed that cast alloys tend to concentrate in the coarser fractions and therefore are better recovered in bottom ash treatment plants.
Tianjin University, Faculty of Environmental Science and Engineering, Tianjin, China.
Yanjun
Y
Hu
Peter
P
Rem
D000497:Alloys / Q000737:chemistry*; D000535:Aluminum / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D002947:Cities; D060729:Coal Ash; D004785:Environmental Pollutants; D017745:Incineration; D052638:Particulate Matter / Q000737:chemistry*; D014866:Waste Products / Q000032:analysis*
D000497:Alloys; D060729:Coal Ash; D004785:Environmental Pollutants; D052638:Particulate Matter; D014866:Waste Products; D002244:Carbon; D000535:Aluminum