Properties of molybdenum powders obtained by reduction in moving beds

We have studied The process of decomposition of ammonium paramolybdate and reduction of the molybdenum oxides in moving beds with rotation of the work ing chamber. We have shown that agglomerated disperse molybdenum powders ar e formed under these conditions. Movement of powder beds during reduction e nsures continuous contact between the oxides being reduced and the hydrogen , rapid removal of water vapor from the reaction zone, and establishment of nearly kinetic reduction conditions. As a result the metallic molybdenum p owders are strong, highly porous agglomerates, similar to the MoO3 particle s in size and shape. The powders have high bulk (as-poured) density and goo d flowability, and their dispersity depends only on the reduction temperatu re.