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CaO-Assisted Carbothermal Reduction of MoS2 to Synthesize Molybdenum Powder

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Abstract

Molybdenite (MoS2) is the most commonly used mineral for molybdenum extraction. In this work, molybdenum (Mo) powder was directly synthesized via CaO-assisted carbothermic reduction of MoS2. The experimental results showed that MoS2 first reacted with CaO to form CaMoO4, Mo and CaS, and then carbon black reduced the CaMoO4 to yield Mo. Almost all the sulfur as MoS2 was fixed in CaS, and the main gaseous product was CO. In addition, it was observed that MoS2 can be almost fully converted to Mo at a MoS2: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%.

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Acknowledgements

This work was financially supported by the State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, China.

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  1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China

    He-Qiang Chang, Guo-Hua Zhang & Kuo-Chih Chou

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  1. He-Qiang Chang
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  2. Guo-Hua Zhang
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Correspondence to Guo-Hua Zhang.

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Chang, HQ., Zhang, GH. & Chou, KC. CaO-Assisted Carbothermal Reduction of MoS2 to Synthesize Molybdenum Powder. JOM 73, 2540–2548 (2021). https://doi.org/10.1007/s11837-021-04719-6

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