煤灰熔融性是指在规定条件下，随加热温度的变化，煤的灰分的变形、软化和流动特征的 物理状态。 煤的灰分的主要成分有SiO2、Al2O3、CaO、MgO、 Fe2O3等，它没有固定的熔点，当其加热到一定温度时开始局部熔化，随着温度升高，熔化部分增加，到某一温度时全部熔化。这种逐渐熔化的过程，使煤灰试样产生变形、软化和流动。所以人们就以与变形、软化和流动这三态相应的温度来表征煤的熔融性。
论述了煤灰熔融性温度与测试气氛、煤灰成分、矿物组成等因素之间的关系。
The relation between ash-fusion temperature and some factors such as measurement atmosphere, composition of ash and mineral matters were discussed.
重点介绍了新的测定技术及研究现状，为改善煤灰熔融性测定效果提供参考。
As a reference, the author emphasized on new technology of determining and the study status to improve the effect of determining the fusibility of coal ash.
分析了影响煤灰熔融性测定结果的多种影响因素，提出了提高测定结果的准确性应注意的事项。
Many influential factors of the result of measuring coal ash fusing temperature were analysed, and noticed proceeding which improves the accuracy of the result was put forward in this paper.
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