Removal of Cl from the Incineration Ash of Domestic Municipal Solid Waste

  • Han, Gi-Chun (Korea Institute of Geoscience and Mineral Resources) ;
  • Kim, Hyung-Seok (Korea Institute of Geoscience and Mineral Resources) ;
  • Ahn, Ji-Whan (Korea Institute of Geoscience and Mineral Resources) ;
  • Kim, Hwan (School of Materials Science and Eng., Seoul National University)
  • Published : 2001.10.01

Abstract

The removal rate of Cl from municipal solid waste incineration(MSWI) ash(bottom ash and fly ash) by washing was investigated. The Cl contents in the bottom ash and fly ash were 2.6-3.0% and 25-30% respectively, and KCl, NaCl, CaCIOH and friedel's salt were main components. From the results on the effects of washing time and temperature, the Cl contents in the bottom ash and fly ash were decreased up to 0.3% and 2.0% respectively by using of water as a solvent within 30 min at 2$0^{\circ}C$, 300 rpm of agitation speed and 10 of liquid/solid ratio. It is expected that the removal of Cl from the incineration ash by washing could make use of the ash for a cement raw material and so on.