Abstract
A new method of measurement of ash fusion temperatures has been developed using essentially the same equipment as is used for measurement of ash fusibility under Standards such as AS1038.15–87 and ASTM D1857–87. However, unlike the standard method the new method produces quantitative results of progressive dimensional changes during heating and melting of the ash. Further, the new method has much improved precision in determination of the temperatures at which these changes take place. Repeatability and reproducibility of the results are much improved and have scope for further improvement. Correspondence between the index points of current ash fusion tests [Initial Deformation, Sphere, Hemisphere and Flow] with reference points in the new method is poor, particularly in relation to ID temperatures and initial dimensional changes. The temperatures of significant movement in the new test appear to be systematic and therefore are likely to correspond to mineralogical melting points. As slagging and fouling mechanisms depend on relative melting of mineral phases, the new test should provide a significant improvement on the current ash-fusion method.
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Coin, C.D.A., Kahraman, H., Peifenstein, A.P. (1996). An Improved Ash Fusion Test. In: Baxter, L., DeSollar, R. (eds) Applications of Advanced Technology to Ash-Related Problems in Boilers. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9223-2_12
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DOI: https://doi.org/10.1007/978-1-4757-9223-2_12
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