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Preparation of microsized hematite powder from ferrous sulfate via microwave calcination

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Abstract

The preparation of microsized hematite powder from ferrous sulfate using microwave calcination was investigated based on the TG/DTG curves. The decomposition of industrial ferrous sulfate under air atmosphere was divided into three stages, and a ferrous sulfate sample added with 15% Fe2O3 could strongly absorb microwave energy. Therefore, preparing hematite powder from ferrous sulfate using microwave calcination was feasible. Hematite was obtained under the following optimized conditions: calcination temperature, 850 °C; microwave power, 650 W; and sample amount, 40 g. The obtained hematite satisfied the first-grade quality requirements. The total ferrum value was more than 58%, and the total sulfur and phosphorus contents were less than 0.5% and 0.2%, respectively. X-ray powder diffraction and scanning electron microscopy were used to characterize the structure and morphology of microsized hematite powder. The particles were non-spherical in shape, and the average particle size distribution was 10.45 μm. This work provides new potential applications for waste ferrous sulfate.

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Authors and Affiliations

  1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China

    Bing-guo Liu  (刘秉国), Yan-tao Yu  (余延涛), Jin-hui Peng  (彭金辉), Li-bo Zhang  (张利波) & Sheng-hui Guo  (郭胜惠)

  2. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization in Yunnan Province, Kunming, 650093, China

    Bing-guo Liu  (刘秉国), Yan-tao Yu  (余延涛), Jin-hui Peng  (彭金辉), Li-bo Zhang  (张利波) & Sheng-hui Guo  (郭胜惠)

  3. Key Laboratory of Unconventional Metallurgy of Ministry of Education, Kunming University of Science and Technology, Kunming, 650093, China

    Bing-guo Liu  (刘秉国), Yan-tao Yu  (余延涛), Jin-hui Peng  (彭金辉), Li-bo Zhang  (张利波) & Sheng-hui Guo  (郭胜惠)

  4. Chemical Engineering Department, the Petroleum Institute, Abu Dhabi, UAE

    C. Srinivasakannan

Authors
  1. Bing-guo Liu  (刘秉国)
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  2. Yan-tao Yu  (余延涛)
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  3. Jin-hui Peng  (彭金辉)
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  4. C. Srinivasakannan
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  5. Li-bo Zhang  (张利波)
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  6. Sheng-hui Guo  (郭胜惠)
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Corresponding author

Correspondence to Jin-hui Peng  (彭金辉).

Additional information

Foundation item: Project(2013AA064003) supported by the National Technology Research and Development Program of China; Project(51564033) supported by the National Natural Science Foundation of China; Project(2016FA023) supported by the Yunnan Applied Basic Research (CNMRCUXT1403) State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, China

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Liu, Bg., Yu, Yt., Peng, Jh. et al. Preparation of microsized hematite powder from ferrous sulfate via microwave calcination. J. Cent. South Univ. 24, 1720–1726 (2017). https://doi.org/10.1007/s11771-017-3579-5

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  • DOI: https://doi.org/10.1007/s11771-017-3579-5

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