2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 6: Yagi Intl. Symp. / Metals & Alloys Processing

Editors:Kongoli F, Akiyama T, Nogami H, Saito K, Fujibayashi A
Publisher:Flogen Star OUTREACH
Publication Year:2016
Pages:480 pages
ISBN:978-1-987820-46-1
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)
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    Effect of MgO on Re-crystallization of Fe2O3 in Pellets

    Gao Qiangjian1; Wei Guo1; Fengman Shen2; Zheng Haiyan3; Shen Fengman1;
    1SCHOOL OF METALLURGY, NORTHEASTERN UNIVERSITY, Shenyang, China; 2, Shenyang, China; 3SCHOOL OF METALLURGY, Shenyang, China;
    Type of Paper: Regular
    Id Paper: 30
    Topic: 3

    Abstract:

    Induration process of oxidized pellets involves the oxidation of Fe3O4 and re-crystallization of Fe2O3. It is acknowledged that the re-crystallization of Fe2O3 in pellets is significant for pellets to obtain better ambient strength. In present work, the effect of MgO on the re-crystallization of Fe2O3 was studied. The results demonstrated that, as the mass fraction of MgO in pellets increased from 0% to 2.0%, the Fe2O3 crystallites would decrease gradually and distribute unevenly in pellets. Moreover, the crystallite connection of Fe2O3 would get weaker. In addition, MF-{(Fex Mg1-x) O Fe2O3} phase would be generated in pellets. According to the quantitative analysis, with an addition of MgO content in pellets mentioned above, the volume-percentage of hematite decreased from 85.52% to 73.34%, and the magnetite and MF phase increased from 5.27% to 16.33%. Therefore, MgO plays a negative role in re-crystallization of Fe2O3. And the macro-performance of that was the compression strength (CS) of pellets which would be lower after the addition of MgO in pellets.

    Keywords:

    MgO; Pellets; Induration process; Fe2O3; Re-crystallizaiton

    References:

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    Cite this article as:

    Qiangjian G, Guo W, Shen F, Haiyan Z, Fengman S. Effect of MgO on Re-crystallization of Fe2O3 in Pellets. In: Kongoli F, Akiyama T, Nogami H, Saito K, Fujibayashi A, editors. Sustainable Industrial Processing Summit SIPS 2016 Volume 6: Yagi Intl. Symp. / Metals & Alloys Processing. Volume 6. Montreal(Canada): FLOGEN Star Outreach. 2016. p. 406-413.