一、差热分析法煤变质的本质是煤核结构的变化,从而引起煤的物理化学性质的变化。煤的加热过程对煤的变质程度有一定的反映,因此,可以用差热分析法来研究煤的变质。煤的差热曲线为一平缓的放热峰(图1)。峰的起燃温度代表煤的挥发物开始分解逸出的温度,峰温代表最大燃烧温度,终结温度表示燃烧 First, the differential thermal analysis method The essence of coal metamorphism is the change of coal core structure, which leads to changes in the physical and chemical properties of coal. Coal heating process on the degree of deterioration of coal have a certain degree of reflection, therefore, can be used to study the thermal deterioration of coal metamorphism. The differential thermal curve of coal is a gentle exothermic peak (Figure 1). The peak light-off temperature represents the temperature at which the volatiles of coal begin to decompose and escape, the peak temperature represents the maximum combustion temperature, and the end temperature represents the combustion