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对灰熔点较低的神华烟煤与灰熔点较高的永城无烟煤以及这两种煤组成的混合煤,进行了灰熔融性研究。通过FactSage软件对上述几种煤样的成渣温度、主要成分进行计算,利用SEM技术对灰渣的微观形貌进行分析。研究结果表明:随着永城无烟煤比例增加,灰渣微观结构由熔融致密层向烧结层转变,煤粉灰熔点提高,这与FactSage软件计算温度很好吻合。
The ash fusion of Shenhua bituminous coal with low ash melting point and Yongcheng anthracite with high ash melting point and the mixed coal consisting of these two kinds of coal were studied. Through the FactSage software, the slagging temperatures and the main components of the above coal samples were calculated, and the microscopic morphology of the ash residue was analyzed by SEM. The results show that with the increase of the proportion of Yongcheng anthracite coal, the microstructure of the ash microstructure changes from the dense layer to the sintered layer, and the melting point of the ash increases, which is in good agreement with the calculated temperature of FactSage software.