煤炭作为我国的主要能源,对我国国民经济的发展起着极其重要的作用。煤中矿物质的性质与含量对于煤的加工利用工艺的各个工序都有很大影响。煤中矿物质的行为直接影响到煤燃烧后煤灰的熔融特性。我国的神华煤灰熔融温度相对很低，为了工业需求，需要将其灰熔融温度提高。 本文主要研究神华煤灰成分中的SiO2、A12O3、Fe2O3、CaO、Na2O、MgO、TiO2、硫化物以及灰渣中未燃尽的碳对熔融特性的影响，以此来寻找灰中成分对灰熔融温度影响的基本规律。试验方法是采用化学品按神华煤含量特征配比成模拟灰，改变其中需要研究成分的含量，再对试样进行灰熔融温度的试验和XRD分析，得到该研究对象对整体神华煤灰熔融特性的影响和对其它组分灰熔融温度的影响。 得出灰中的SiO2、A12O3、Fe2O3、CaO、Na2O、MgO、TiO2、硫化物及残碳各自对灰熔融性的影响以及相互作用的规律。其中TiO2含量增加能提高灰熔融温度，Fe2O3和Na2O含量增加降低灰熔融温度，SiO2、A12O3和CaO对灰熔融温度有双重作用，硫化物和残碳对灰熔融温度影响很复杂，MgO对灰熔融温度影响不大。最终得到提高神华煤灰熔融温度的最佳方案。

Coal plays an extremely important role in the development of Chinese national economy as the main energy sources. Mineral content in coal has greatly affected the coal processing and rational utilization. Minerals in coal directly affect the behavior of coal combustion and its ash fusibility. Because of relatively low fused temperature of the ash, Shenhua Coal is utilized restrictedly in China. In order to satisfy industrial demand, it must be required to improve the ash fusibility. The changing law of coal-ash fusibility with content of the silicon dioxide, aluminum oxide, ferric oxide, calcium oxide and sodium oxide, magnesia, titanium oxide, sulphide and the unburned carbon in the ash was systematically studied in this paper. The experimental samples are the factitious ash composed by the chemical based on the content-character of the Shenhua coal. The law of influence of each component on fusibility of factitious ash was found out by measuring the samples' melt point and XRD of the melt. And the key factors of influence on low fused temperature of Shenhua-coal-ash were researched. The results showed that content of silicon dioxide, aluminum oxide, ferric oxide,calcium oxide and sodium oxide, magnesia, titanium oxide, sulphide and theunburned carbon affects the fusibility of ash each other. Increasing the content of TiO2 the melt point was heightened, and increasing the content of Fe2O3 and Na2O the melt point was lowered. Silicon dioxide, calcium oxide and aluminum oxide had dual effect. The effect of sulphide and the unburned carbon was complicated. Magnesia hardly impacts on the melt point. Finally, additive schemes increasing fused temperature of Shenhua-coal-ash were found.