| 摘要 |
Loss on ignition (LOI) is a very common method for estimating the volatile species
in solid sample. Normally, the measurement of LOI can be convenient and accurate, but for
municipal solid waste incineration (MSWI) ash, the process may become intricate due to the
complexity of the sample. In the incineration ash, there exist various phases, such as mineral,
metal, organic and glass. The reaction and transformation of some materials during heating
will influence the measurement. 5 incineration ash samples were selected and tested in this
study. LOI content was basically measured at high (850°C) and relatively low (440°C)
temperatures. The comparison between these two measurements showed a large difference. Xray
diffraction (XRD) and thermal analysis (TG-DTA) were carried out to investigate the
mineral changes and weight losses with different ignition temperatures. The mineralogical
analysis suggests that the decomposition of hydrate and carbonate phases cannot be neglected
for LOI measurement of incineration. A long-time heating under relatively lower temperature
(400~450°C) compared with soil sample measurement (≥500°C) was recommended by this
study. |