Ash fusion point of coal
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Explanation of coal’s ash fusion point: The melting temperature of ash in a molten state?
I searched on Baidu. Ash melting point, also known as fusibility, is the temperature at which the ash in solid fuels begins to deform, soften, and melt when heated to a certain degree; it is related to the composition of the ash in the raw material. When the contents of aluminum oxide and silicon dioxide in the ash are high, the ash melting point is high ； Moreover, the higher the contents of iron oxide trioxide, calcium oxide, magnesium oxide, sodium oxide, and potassium oxide, the lower the ash melting point.
The ash fusion temperature is classified into four stages: deformation, softening, hemispherical shape, and flow. When people talk about ash fusion temperature today, they usually refer to T4, which is the flow temperature. Due to the differences in the composition of coal ash, there is no fixed value; it is generally expressed as a range