METHOD OF PRODUCING MOLYBDENUM POWDER Russian patent published in 2018 - IPC C22B34/34 B22F9/22 

FIELD: chemistry; metallurgy.

SUBSTANCE: invention relates to the production of molybdenum powder. Method includes the charging of molybdenum oxide MoO₃ into the boat, loading of the boat into the tubular furnace, feeding of hydrogen into the tubular furnace, and two-step reduction of the molybdenum oxide MoO₃ with the advance motion of the boat in the furnace. Hydrogen supply is carried out concurrently along the movement direction of the boats at a flow rate of 20 l/min in the first and second reduction stages. In the first stage of reduction, hydrogen is supplied with a dew point of 50–60 °C while the speed of boat movement in the furnace is 12–15 mm/min, and in the second stage – with a dew point of 60 °C while the speed of boat movement in the furnace is 30 mm/min.

EFFECT: production of ultrafine molybdenum powder with a specific surface of 3,0 m²/g is provided.

1 cl, 3 ex