深刻理解新疆煤的无机特性对其燃烧颗粒物生成的影响规律，对于新疆煤的清洁高效利用具有重要意义。选取五彩湾煤(WCW)、万象煤(WX)、天池煤(TC)和西黑山煤(XHS)，深入研究了它们的无机特性及其与超细颗粒物生成之间的关联关系。结果表明，4种新疆煤主要为低灰、低硫褐煤；煤灰富含碱性元素，其中，Na₂O质量分数普遍高于常规动力煤(3.58%～7.13%)，WCW和WX煤灰中CaO质量分数超过33%，但SiO₂和Al₂O₃质量分数较低，WX煤的高Na、高Cl特性尤为突出；煤中Na以水溶态为主(占比62.3%～90.6%)，K则主要以盐酸不溶态存在，Fe以盐酸溶态和盐酸不溶态为主，而Ca、Mg在不同形态中的分布因煤种而异。新疆煤燃烧超细颗粒物组成均以Na、K、Cl、S为主，以Na₂O+K₂O+Cl+SO₃的质量分数高于50%为判定条件，准确界定了超细颗粒物的粒径范围。其中，WCW煤、TC煤和XHS煤的超细颗粒物具有相似的粒径范围(≤0.07 μm)；而水溶态Na含量最高的WX煤的超细颗粒物粒径范围更宽(≤0.76 μm)。研究发现超细颗粒物的生成量y与煤中水溶态(Na+K)总量x呈高度线性正相关，关系式为y=0.528x−0.239，相关系数为0.948。

A deep understanding of the effects of the inorganic characteristics of Xinjiang coals on combustion particulate generation is of great significance for their clean and efficient utilization. This work investigated the inorganic characteristics of Wucaiwan coal (WCW), Wanxiang coal (WX), Tianchi coal (TC), and Xiheishan coal (XHS) and the their relationship with the production of ultrafine particulates during combustion. The results show that the four Xinjiang coals are mainly lignites with low ash and sulfur contents. Coal ashes are enriched in basic elements. Among them, the content of Na₂O (3.58%−7.13%) is commonly higher than that of conventional utility coals. The ashes of WCW and WX coals have higher contents of CaO (> 33%), but low contents of SiO₂ and Al₂O₃. WX coal is particularly characterized by high Na and Cl. The Na in coal is primarily water soluble(62.3%−90.6%). The K is mainly HCl insoluble. The Fe occurs primarily as HCl soluble and insoluble forms. And the distribution of Ca and Mg in different forms varies according to coal types. The composition of ultrafine particulate matter from Xinjiang coal combustion is dominated by Na, K, Cl, and S. The particle size range of the ultrafine particulate matter is accurately defined by using the condition that the mass fraction of Na₂O+K₂O+Cl+SO₃ is higher than 50%. The ultrafine particulate matter of WCW, TC and XHS coals has similar particle size ranges (≤0.07 μm); while the ultrafine particulate matter of WX coal, which has the highest content of Na in the water-soluble form, has a wider particle size range (≤0.76 μm). The generation of ultrafine particulate matter (y) is found to be highly linearly and positively correlated with the total amount of water-soluble (Na+K) (x) in the coal, with the relationship equation y = 0.528x−0.239 and the correlation coefficient of 0.948.