CaO-Assisted Carbothermal Reduction of MoS2 to Synthesize Molybdenum Powder

Molybdenite (MoS 2 ) is the most commonly used mineral for molybdenum extraction. In this work, molybdenum (Mo) powder was directly synthesized via CaO-assisted carbothermic reduction of MoS 2 . The experimental results showed that MoS 2 first reacted with CaO to form CaMoO 4 , Mo and CaS, and then...

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Bibliographic Details
Published in:JOM (1989) 2021-08, Vol.73 (8), p.2540-2548
Main Authors: Chang, He-Qiang, Zhang, Guo-Hua, Chou, Kuo-Chih
Format: Article
Language:English
Subjects:
Calcium compounds
Carbon black
Carbon content
Carbothermic reactions
Chemistry/Food Science
Earth Sciences
Electron microscopes
Engineering
Environment
Experiments
High temperature
Molybdenite
Molybdenum
Molybdenum disulfide
Oxidation
Physics
Quartz
Reduction (metal working)
Sulfur
Sulfur content
Synthesis
Technical Article
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Summary:Molybdenite (MoS 2 ) is the most commonly used mineral for molybdenum extraction. In this work, molybdenum (Mo) powder was directly synthesized via CaO-assisted carbothermic reduction of MoS 2 . The experimental results showed that MoS 2 first reacted with CaO to form CaMoO 4 , Mo and CaS, and then carbon black reduced the CaMoO 4 to yield Mo. Almost all the sulfur as MoS 2 was fixed in CaS, and the main gaseous product was CO. In addition, it was observed that MoS 2 can be almost fully converted to Mo at a MoS 2 :CaO:C molar ratio of 1:4:1.7 after reacting at 1200°C for 60 min. After removing by-product CaS, the prepared Mo powder has a carbon content of 0.18% and a sulfur content of 0.46%.
ISSN:1047-4838
1543-1851
DOI:10.1007/s11837-021-04719-6