以纯试剂为原料进行焙烧试验,采用热力学计算、XRD、SEM-EDS、高温原位分析等手段,研究辉钼矿(MoS2)氧化过程的自烧结行为.结果表明,当焙烧温度由600℃提高至700℃时,辉钼矿团块中物料烧结的面积随之增大,导致脱硫效率降低.烧结层在氧化焙烧的初期快速形成,且常覆盖在团块迎风侧表面.在物料烧结的同时,MoO2和Mo4O11也集中生成,与MoO3共同构成烧结层.进一步研究发现,含低价钼氧化物的富MoO3产物熔点较低,在MoS2与O2反应剧烈放热时易发生熔化,致使物料烧结.“,”Roasting experiments were carried out with pure reagents as raw materials. The self-sintering behaviors of molybdenite (MoS2) during oxidation were investigated by thermodynamic calculation, XRD, SEM-EDS and high-temperature in situ analysis. The results indicate that the desulfurization efficiency of MoS2 pellet decreases with the increase of roasting temperature from 600 to 700℃, owing to the expansion of sintered area. At the very beginning of roasting, sintered layer can be rapidly formed and cover the pellet surface on the windward side, and meanwhile, MoO2 and Mo4O11 intensively appear and constitute the sintered layer together with MoO3. Moreover, it is proven that MoO3-rich products containing low-valence molybdenum oxides have low melting points, thus easy to be melted during the occurrence of exothermic reaction between MoS2 and O2, which leads to the sintering of materials.