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Process of Thermal Decomposition of Lithium Carbonate

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Materials Processing Fundamentals 2020

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

Abstract

In recent years, the methods of lithium preparation by metallothermic reduction of its oxide in negative pressure have been developed. Since Li2CO3 was considered as an important raw material for the preparation of Li2O, it is important to clarify the decomposition and melting mechanisms of Li2CO3. The behaviors of decomposition of lithium carbonate under argon, carbon dioxide, and negative pressure were studied by thermogravimetric behavior. Results showed that the decomposition of Li2CO3 can be divided into two steps and the mass loss under different atmospheric conditions is different. The first decomposition temperature of carbonate was 1000 K in argon gas. Decomposition of lithium carbonate was a complex process, including the multiple reactions such as melting of lithium carbonate , dissolution of Li2O and CO2 in Li2CO3, and adsorption of CO2 in Li2O. The first step of the decomposition is reduced, and the second step of the decomposition is increased in carbon dioxide atmosphere or negative pressure, compared with the condition of the argon gas.

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Acknowledgements

The present project was financially supported by the National Natural Science Foundation of China Project (Grant No. 51604133) and the Academician Free Exploration Fund of Yunnan Province, China (Grant No. 2018HA006).

Author information

Authors and Affiliations

  1. National Engineering Laboratory of Vacuum Metallurgy, Kunming University of Science and Technology, Kunming, 650093, People’s Republic of China

    Lei Shi, Tao Qu, Dachun Liu, Yong Deng, Bin Yang & Yongnian Dai

  2. Key Laboratory of Vacuum Metallurgy for Non-Ferrous Metal of Yunnan Province, Kunming, 650093, People’s Republic of China

    Lei Shi, Tao Qu, Dachun Liu, Yong Deng, Bin Yang & Yongnian Dai

  3. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization in Yunnan Province, Kunming, 650093, People’s Republic of China

    Lei Shi, Tao Qu, Dachun Liu, Yong Deng, Bin Yang & Yongnian Dai

Authors
  1. Lei Shi
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  2. Tao Qu
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  3. Dachun Liu
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  4. Yong Deng
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  5. Bin Yang
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  6. Yongnian Dai
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Corresponding author

Correspondence to Tao Qu .

Editor information

Editors and Affiliations

  1. Iowa State University, Ames, IA, USA

    Jonghyun Lee

  2. Novelis, Kennesaw, GA, USA

    Samuel Wagstaff

  3. Boston Metal, Woburn, MA, USA

    Guillaume Lambotte

  4. Massachusetts Institute of Technology, Cambridge, MA, USA

    Antoine Allanore

  5. Åbo Akademi University, Turku, Finland

    Fiseha Tesfaye

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© 2020 The Minerals, Metals & Materials Society

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Shi, L., Qu, T., Liu, D., Deng, Y., Yang, B., Dai, Y. (2020). Process of Thermal Decomposition of Lithium Carbonate. In: Lee, J., Wagstaff, S., Lambotte, G., Allanore, A., Tesfaye, F. (eds) Materials Processing Fundamentals 2020. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-36556-1_10

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