LAUSR

Traditional ash fusion behavior is described by four characterization temperatures determined by shape of variation ash cone, cylinder or cubes. The results by thermomechanical analysis (TMA) describe the whole fusion process, which supports the better understanding of ash fusion process. However, the interaction between slags and crucible at high temperatures is the key factor on the accuracy of TMA measurement. In this work, the influence of interaction between slags and different crucible materials, including platinum (Pt), alumina (Al2O3), zirconia (ZrO2), graphite (C), and molybdenum (Mo), on TMA results and its mechanism was investigated. The slag-crucible interaction includes the diffusion and reaction mechanisms, and the interaction with Al2O3 and ZrO2 crucible is controlled by the diffusion process of slags into crucible wall. Al2O3 crucible is as stable as Pt and has no obvious effect on ash fusion process due to its compact structure and stable crystal form. ZrO2 crucible becomes porous during ...