In this work, effect of milling process and CaO addition on the reaction mechanism and kinetics of aluminothermic reduction of molybdenum trioxide were studied by simultaneous thermal analysis, differential scanning calorimetry, X-ray diffraction analysis and Coats–Redfern method, respectively. For this purpose, molybdenum trioxide was reduced by Al powder under two different conditions of mechanical activation by milling process and as received form mixed by stoichiometric amount of CaO that was required for creation of CaMoO₄ intermediate phase. In the case of using milled molybdenum trioxide, 20 wt% of aluminum oxide was used as heat absorber. The results showed that by using mechanically activated MoO₃, the reduction reactions proceeded through the formation of intermediate phases of Al₂(MoO₄)₃ and MoO₂. In the presence of CaO, the intermediate phase was changed to CaMoO₄. In both cases, the reaction temperatures and their activation energies decreased. The kinetic model for the aluminothermic reduction of un-milled and milled molybdenum trioxide was determined as chemical control, where by addition of CaO, mechanism of the reduction reaction was changed to diffusion control.

在这项工作中，分别通过同时热分析，差示扫描量热法，X射线衍射分析和Coats–Redfern方法研究了研磨工艺和CaO添加对三氧化钼反应机理和铝热还原动力学的影响。为此目的，在两种不同的机械活化条件下，通过碾磨工艺将Al粉还原为三氧化钼，并以生成CaMoO ₄中间相所需的化学计量的CaO混合的形式接收。在使用研磨的三氧化钼的情况下，将20重量％的氧化铝用作吸热剂。结果表明，通过使用机械活化的MoO ₃然后，还原反应通过形成Al ₂（MoO ₄）₃和MoO ₂的中间相而进行。在CaO存在下，中间相变为CaMoO ₄。在两种情况下，反应温度及其活化能均降低。确定未研磨的和研磨的三氧化钼的铝热还原的动力学模型作为化学控制，其中通过添加CaO，将还原反应的机理改变为扩散控制。