Method for clean metallurgy of molybdenum

A method for clean metallurgy of molybdenum, comprising the following steps:

• 1) roasting molybdenite with calcium to obtain a calcified molybdenum calcine, and leaching the calcified molybdenum calcine with an inorganic acid to obtain a molybdenum-containing inorganic acid leachate;
• 2) extracting molybdenum in the molybdenum-containing inorganic acid leachate obtained in step 1) with a cationic extractant to obtain an organic phase loaded with molybdyl cations and a raffinate, wherein the cationic extractant is one or more of P204, P507 or Cyanex272;
• 3) using a hydrogen peroxide solution as a stripping agent, and mixing the hydrogen peroxide solution with the organic phase loaded with molybdyl cations to obtain a molybdenum stripping liquor;
• and
• 4) heating the molybdenum stripping liquor to dissociate peroxymolybdic acid therein so as to form a molybdic acid precipitate, and then calcining to obtain a molybdenum trioxide product.