中文摘要：

将碱金属盐添加剂折算为对应的碱金属氧化物加入不同种类的煤灰中，在弱还原性气氛中进行烧结实验以研究煤灰沾污特性．结果表明：天池能源煤具有较强的沾污特性，这是因为其煤灰中Na元素含量较高；煤灰中加入碱金属盐可以明显促进煤灰的烧结，降低煤灰的初始沾污温度；煤灰的沾污特性受到碱金属盐与灰样中固有矿物成分的共同作用；低温阶段Na基化合物对煤灰烧结特性的影响强于K基化合物，而高温阶段则是K基化合物的影响更强．

英文摘要：

To study the fouling properties of coal ash, sintering experiments were carried out in weak reducing atmosphere by converting alkali salt additives into equivalent weight of alkali oxides, and then adding them into different kinds of coal ash. Results show that Tianchi Energy coal has strong tendency of fouling due to high content of Na element in the coal ash; alkali salt additives can obviously promote the sintering of coal ash and reduce its initial fouling temperature; the fouling properties of coal ash are deter- mined by the combined effect of alkali salt additives and the inherent minerals; Na-based compounds have stronger effect on the fouling properties of coal ash than K-based compounds at low temperatures, while K-based compounds have stronger effect at high temperatures.