Paper Title:
Effect of Magnetic Separation in Heavy Metals of Municipal Solid Waste Incineration Bottom Ash
  Abstract

Bottom ash contains many ferrous materials (e.g. ferrous metals, Fe3O4, Fe2O3, FeS). In addition, ferrous metals include the heavy metals, as Ni and Cr have a chemical attraction to iron, with Cu used to coat with Ni and Cr metals for polishing or to prevent corrosion. For ferrous metals, the formation of a Fe3O4-Fe2O3 double layer (similar to pure Fe) was found during air-annealing in an incinerator (1000C). A strong thermal shock, such as that which takes place during water-cooling of bottom ash, leads to the breakdown of this oxidation layer, facilitating the degradation of ferrous metals and the formation of corrosion products. Therefore, Fe-ion (heavy metal) oxides can be formed on ferrous metals, and magnetic separation can separate it from bottom ash. Thus, in this study the objection is to investigate the separation ratio of heavy metals by magnetic separation along with the mineralogical formation of Fe-ion (a heavy metal).

  Info
Periodical
Materials Science Forum (Volumes 544-545)
Edited by
Hyungsun Kim, Junichi Hojo and Soo Wohn Lee
Pages
557-560
DOI
10.4028/www.scientific.net/MSF.544-545.557
Citation
G. C. Han, N. I. Um, K. S. You, H. C. Cho, J. W. Ahn, "Effect of Magnetic Separation in Heavy Metals of Municipal Solid Waste Incineration Bottom Ash", Materials Science Forum, Vols. 544-545, pp. 557-560, 2007
Online since
May 2007
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Price
$32.00
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