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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    Comparison on Self-strength of MgO，Fe2O3 and CaO，Fe2O3

    Guo He1; Shen Fengman2; Ge Chuanyun3; Wang Ning3; Zhang Guangqiang3; Gao Qiangjian2; Zheng Haiyan4; Wei Guo2; Fengman Shen5;
    1, Shenyang.Liaoning, China; 2SCHOOL OF METALLURGY, NORTHEASTERN UNIVERSITY, Shenyang, China; 3, Shenyang-Liaoning-China, China; 4SCHOOL OF METALLURGY, Shenyang, China; 5, Shenyang, China;
    Type of Paper: Regular
    Id Paper: 37
    Topic: 3

    Abstract:

    A series of experiments on sinter strength by MgO are carried out. The results show that, if chemical reagents MgO and CaO are added by MgO/CaO: Fe2O3=1:1 (molar ratio), the temperature of liquid formation for MgO，Fe2O3 is higher than that of CaO，Fe2O3. It can be explained by phase diagrams, this is the reason that the strength of sinter with higher MgO content becomes low. Then, the compressive strength of MgO，Fe2O3 and CaO，Fe2O3 are tested. It can be seen that the self-strength of MgO，Fe2O3 is lower than that of CaO，Fe2O3, which is another reason for the lower strength of sinter with higher MgO content. Impurity of chemical reagents has a neglectable effect on experimental, but the size of chemical reagents have big effects. In order to reduce this error, industrial flux is used instead of chemistry reagent. For magnesite or limestone, MgO/CaO:Fe2O3=1:1, the calcination temperature is 1150C. During the experiments, part of CaO in limestone melt, but the melting phenomena of MgO in magnesite is not obvious. This is a reason that the strength of sinter with more magnesite additive is lower. The experimental results of compression strength of industrial flux are similar with chemical reagents. The reason is that liquid formation temperature with magnesite additive becomes higher, which results in a lower self-strength of sinter with higher MgO (or magnesite).

    Keywords:

    sinter;magnesite;self-strength

    References:

    [1] Feng, Jin-Liang; Zhao, Zhen-Hong; Chen, Feng: Rare earth elements in sinters from the geothermal waters (hot springs) on the Tibetan Plateau China, Journal of Volcanology and Geothermal Research, 287(2014), 1-11
    [2] Umadevi, T.; Brahmacharyulu, A.; Sah, R: Optimisation of MgO addition in low and high silica iron ore sinter to improve sinter reducibility at JSW Steel Limited, Ironmaking & Steelmaking: Processes, Products and Applications,41(2014),270-278

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    Cite this article as:

    He G, Fengman S, Chuanyun G, Ning W, Guangqiang Z, Qiangjian G, Haiyan Z, Guo W, Shen F. Comparison on Self-strength of MgO，Fe2O3 and CaO，Fe2O3. 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. 414-423.