小粒度钼粉氧含量的影响因素研究

Influence Factors of Oxygen Content in Small-Particle Molybdenum Powder

研究了钼粉氢还原生产过程中的还原方式、混料方式、保存方式对钼粉粒度及氧含量的影响。结果表明,通过对MoO3进行合理的三段还原,能在较低的温度下,有效降低钼粉氧含量,并控制钼粉的粒度。随着钼粉粒度的变小,钼粉中氧含量容易受环境温度的影响而急剧增加。通过真空混料、抽真空保存等方式,能有效减缓钼粉合批、保存过程中氧含量的增加。

The effect of the reduction, mixing and storage methods on the particle size and oxygen content of molybdenum powder during hydrogen reduction of molybdenum powder was investigated. The results show that the oxygen content of molybdenum powder could be reduced and the particle size could be controlled under a low temperature through employing reasonable three section reduction process of MoO3. The oxygen content of the molybdenum powder becomes sensitive to the environmental temperature with the decrease of the particle size of the molybdenum powder, and thus the oxygen content increase dramatically. The increasing of oxygen content of the molybdenum powder during batch and storage could be reduced by vacuum mixing and vacuum preservation modes.