The changes of ash fusion point of coal blending are not the relationship of simple additivity of ash fusion point for two blended coals but that of non-linearity.

• 配煤灰熔点的变化不是两种单煤灰熔点简单的加和关系,而是非线性的关系,配煤灰熔点与煤灰组成之间也有很大的关系。