【摘要】 本文采用试验和模拟的方法对钼精矿真空分解过程进行研究,得到了钼精矿真空分解过程中单个球团的温度分布及物相变化,模拟结果与试验结果吻合较好,表明模拟结果较准确,有一定的参考意义。采用热力学计算的方法确定了反应开始温度以及其他热力学参数,通过试验测试的方法,得到了钼精矿球团的导热系数,并通过估算和模拟反算的方法,确定了Mo₂S₃和金属钼球团的导热系数,最后将模拟结果与实验结果进行了对比分析。结果表明传热对真空分解过程影响很大,其主要原因是钼精矿球团、Mo₂S₃球团、金属钼球团的导热系数很小。金属钼球团的导热系数较小与其结构形态密切相关。更多还原

【Abstract】 The vacuum decomposition process of molybdenite concentrate was studied by experiment and simulation,the temperature distribution and phase change of single pellet in vacuum decomposition process of molybdenum concentrate were obtained. The simulation results are in good agreement with the experimental results which indicate that the simulation results are credible and have a certain reference value. The reaction starting temperature and other thermodynamic parameters were determined by thermodynamic calculation. The thermal conductivity of molybdenite concentrate was obtained by experimental test,and the thermal conductivities of Mo₂S₃ and Mo pellets were estimated by simulation. Finally,the simulation results and experimental results were compared. And the results show that the reason why the heat transfer has a great influence on the vacuum decomposition process is that the thermal conductivity of molybdenite pellets,Mo₂S₃ pellets and Mo pellets are very small. The thermal conductivity of metal molybdenum pellets is relatively small because of its structure.更多还原