The Processing of Molybdenum ——Upgrading from Tech Oxide
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- Category: Molybdenum knowledge
- Published on 25 June 2013
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About 25% of the roasted molybdenite concentrate produced worldwide is processed into a number of chemical products.
Upgrading is performed by sublimation to produce pure molybdic oxide (MoO3) by wet chemical processes to produce a wide range of pure molybdenum chemicals (mainly molybdic oxides and molybdates).
The latter involves dissolution of the roasted concentrate in an alkaline medium (ammonium or sodium hydroxide), followed by removal of impurities by precipitation and filtration and/or solvent extraction.
The resulting ammonium molybdate solution is then converted to any one of a number of molybdate products by crystallisation or acid precipitation. These can be further processed by calcination to pure molybdenum trioxide.
The resulting ammonium molybdate solution is then converted to any one of a number of molybdate products by crystallisation or acid precipitation. These can be further processed by calcination to pure molybdenum trioxide.
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