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Influence of sulfur content in raw materials on oxidized pellets

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Abstract

The influence of sulfur content in raw materials on oxidized pellets was studied. The results show that most sulfur exists in the form of elementary sulfur in pyrite cinder, and over 95% sulfur is removed in producing pyrite cinder oxidized pellets. The compressive strength of fired pellets drops from 3 186 N to 2 405 N when the ratio of pyrite cinder increases from 40% to 70% under the conditions of preheating at 900 °C for 9 min and firing at 1 230 °C for 15 min. The porosity and microstructures of fired pellets prove that the higher ratio of pyrite cinder is given, and the more holes and cracks are achieved, leading to the better reducibility index (RI) and reduction swelling index (RSI), and the lower compressive strength of fired pellets and the worse reduction degradation index (RDI).

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Authors and Affiliations

  1. School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China

    Tie-jun Chun  (春铁军), De-qing Zhu  (朱德庆) & Jian Pan  (潘建)

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  1. Tie-jun Chun  (春铁军)
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  2. De-qing Zhu  (朱德庆)
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  3. Jian Pan  (潘建)
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Corresponding author

Correspondence to De-qing Zhu  (朱德庆).

Additional information

Foundation item: Project(2007k02) supported by the Technology Fund of the Land and Resources Department of Hunan Province, China

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Chun, Tj., Zhu, Dq. & Pan, J. Influence of sulfur content in raw materials on oxidized pellets. J. Cent. South Univ. Technol. 18, 1924–1929 (2011). https://doi.org/10.1007/s11771-011-0924-y

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  • DOI: https://doi.org/10.1007/s11771-011-0924-y

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