Name : The 37th Conference of Coal Science
Number : 37
Location : [in Japanese]
Date : September 28, 2000 - September 29, 2000
Pages 113-116
A new control method was developed for toxic metal ion elution from fly ash in an acid solution. Coated fly ash pellets were prepared by covering with bottom ash produced from the same coal-fired boiler and subsequent sintering at 1300℃. The elution test was carried out in the acid solution of pH3,4 and 5.5 for the fly ash pellets with and without the bottom ash coating. The coating of fly ash pellet suppressed the elution of lead ion, independent of acidity of solution, while the fly ash pellet without coating showed an increase of lead elution with lowering of pH.
