Iron speciation in coal fly ashes-chemical and M?ssbauer analysis

摘要

Iron speciation analysis of fly coal ashes was performed using transmision M?ssbauer spectrometry as well as chemical methods. The investigated samples of ashes came from stoker-fired boiler and pulverized-fuel boiler (of significantly higher combustion temperature). The M?ssbauer spectra show noticeable differences in iron-bearing phases content. In the first case aluminosilicate glass dominates, whereas in the second one-a spinel-type phase.