Clean production method for preparing high-purity molybdenum powder from molybdenum trisulfide

The invention provides a clean production method for preparing high-purity molybdenum powder from molybdenum trisulfide, which comprises the following steps: carrying out closed reduction on pure MoS3 in a rotary tube furnace, simultaneously introducing pure nitrogen and hydrogen into a furnace tube of the closed rotary furnace from a discharging end to a feeding end, exhausting tail gas from a gas tube at the feeding end through negative pressure, and discharging the tail gas into a furnace tube of the closed rotary furnace from the discharging end to the feeding end, the furnace temperatures of the three belts are set to be 500-600 DEG C, 700-800 DEG C and 900-1000 DEG C respectively, the reduction time is 20-85 min, and the molybdenum powder with the oxygen content being lower than 10 ppm and the purity being 99.99% is obtained. The raw materials are wide in adaptability, ammoniation-free production is achieved, tail gas treatment adopts green cyclic utilization, efficiency and economy are achieved, techno