The results showed that in the roasting process of the molybdenite, the manganese dioxide could not only have good function of sulfur fixation, but also lower roasting temperature obviously and promote the oxidation decompound of molybdenum disulfide. 结果表明,二氧化锰在辉钼矿焙烧过程中,不仅能起到良好的固硫作用,而且能显著降低焙烧温度,促进辉钼矿的氧化分解。