燃煤过程中产生的飞灰颗粒呈现出双峰状的尺寸分布,其中的微细颗粒因其表面富含有毒痕量元素且不易捕集,对人类健康造成极大危害,故受到广泛关注.研究表明,微细颗粒是通过煤中无机难熔矿物的还原蒸发、成核、凝结以及凝并等过程产生并长大的.针对煤中的主要无机矿物元素,系统地论述了微细颗粒形成的各个过程以及各过程子模型的建立,在深入理解微细颗粒生成机理的基础上提出了进一步的研究方向. The fly ash particles produced during coal combustion show a bimodal size distribution, of which the fine particles are widely concerned because their surfaces are rich in trace elements and are not easy to capture and cause great harm to human health. It shows that the fine particles are produced and grown by the process of reduction evaporation, nucleation, condensation and condensation of inorganic refractory minerals in coal.Aiming at the main inorganic mineral elements in coal, the processes of the formation of fine particles are systematically discussed As well as the establishment of each process submodel, further research directions are put forward based on the understanding of the formation mechanism of fine particles.