Municipal solid waste incinerator(MSWI) fly ash can be used as raw material for cement.Before utilization the heavy metals and the chloride must be pretreated or stabilized to meet the standard of cement production.The thermal stability of heavy metal after MSWI fly ash was pretreated by phosphate via water washing was studied.The result demonstrates that the chloride concentration declines to 1% and the leaching of heavy metals complies with the TCLP standard.Meanwhile,the thermal stability of heavy metals...