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Influences of Different Components on Agglomeration Behavior of MoS2 During Oxidation Roasting Process in Air

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Abstract

An agglomeration of the furnace charge always takes place during the oxidation roasting process of molybdenite concentrate (with the main component of MoS2) in multiple hearth furnaces, which greatly affects the production process and furnace service life. In the present work, a preliminary study about the influence of various components on the agglomeration phenomenon of pure MoS2 have been carried out. The results show that reaction temperature, impurity content, and air flow rate have significant effects on the agglomeration extent. Meanwhile, the impurity type added into the pure MoS2 plays a crucial role. It was found that CaO and MgO have a stronger sulfur-fixing effect and that the desulphurization of the roasted product was uncompleted. It was also concluded that the agglomeration is due to the formation of low-melting-point eutectics, including that between MoO3 and impurities and that between MoO3 and Mo4O11. It is suggested that decreasing the impurities contents, especially K, Cu, Pb, and Fe, is an effective method for reducing the extent of agglomeration.

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Acknowledgments

The authors would like to acknowledge financial support from the National Natural Science Foundation of China (51304018 and 51474141).

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Authors and Affiliations

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

    Lu Wang (Doctoral Student), Guo-Hua Zhang (Associate Professor), Jing-Song Wang (Professor) & Kuo-Chih Chou (Professor)

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  1. Lu Wang
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  2. Guo-Hua Zhang
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Correspondence to Guo-Hua Zhang.

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Manuscript submitted December 12, 2015.

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Wang, L., Zhang, GH., Wang, JS. et al. Influences of Different Components on Agglomeration Behavior of MoS2 During Oxidation Roasting Process in Air. Metall Mater Trans B 47, 2421–2432 (2016). https://doi.org/10.1007/s11663-016-0696-8

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