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Oxidation behavior of artificial magnetite pellets

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Abstract

The oxidation behavior of artificial magnetite pellets was investigated through measurements of the oxidation degree and mineralogical analysis. The results show that artificial magnetite pellets are much easier to oxidize than natural magnetite. The oxidation is controlled through two different reaction mechanisms. The oxidation of artificial magnetite is dominated by internal diffusion, with an activation energy of 8.40 kJ/mol, at temperatures less than 800°C, whereas it is controlled by chemical reaction, with a reaction activation energy of 67.79 kJ/mol, at temperatures greater than 800°C. In addition, factors such as the oxygen volume fraction and the pellet diameter strongly influence the oxidation of artificial magnetite: a larger oxygen volume fraction and a smaller pellet diameter result in a much faster oxidation process.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (No. 51474161).

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Authors and Affiliations

  1. School of Resource and Civil Engineering, Wuhan Institute of Technology, Wuhan, 430205, China

    Han-quan Zhang

  2. Western Mining Company, Xi’ning, 810001, China

    Jin-tao Fu

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  1. Han-quan Zhang
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Correspondence to Han-quan Zhang.

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Zhang, Hq., Fu, Jt. Oxidation behavior of artificial magnetite pellets. Int J Miner Metall Mater 24, 603–610 (2017). https://doi.org/10.1007/s12613-017-1442-1

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  • DOI: https://doi.org/10.1007/s12613-017-1442-1

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