Study on Compressive Strength of Pellets for the Novel Silicothermic Process

  • Daxue Fu
  • Lukui Guan
  • Ming Wen
  • Zhi-he Dou
  • Rui Zhang
  • Ting-an Zhang
Chapter

Abstract

A novel process of magnesium production has been developed by changing the preparation method of pellets of silicothermic process. For the method, the pellets consist of dolomite, ferrosilicon, fluorite and binder, which need to be roasted before reduction. However, the discharge of carbon dioxide reduces compressive strength of the pellets during the calcinations. Therefore, the present paper reports the effects of calcination atmosphere, temperature and insulation post-processing conditions on compressive strength of pellets. The results indicated that compressive strength was increased with increasing calcination temperature and post-processing temperature. The value of compressive strength obtained in air was larger than that in other atmospheres. The compressive strength value reached 80N in the experimental condition. The pellet was reduced at 1473K for 60min and the reduction ratio reached 86.75%.

Keywords

Dolomite Compressive Magnesium Silicothermic 
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References

  1. [1]
    MAO Ping-li, LIU Zheng, WANG Chang-yi, GUO Quan-ying, SUN Jin, WANG Feng, LIN Li. Fatigue behavior of magnesium alloy and application in auto steering wheel frame [J]. Transactions of Nonferrous Metals Society of China, 2008, 18(1): s218–s222.Google Scholar
  2. [2]
    LIU Bin, TANG Ai-tao, PAN Fu-sheng, ZHANG Jing, PENG Jian, WANG Jing-feng. Improvement and application of neural network models in development of wrought magnesium alloys [J]. Transactions of Nonferrous Metals Society of China, 2011, 21(4): 885–891.CrossRefGoogle Scholar
  3. [3]
    Lebedev O A, Brusakov Y, Shkuryakov N P. Express monitoring of MgCl2 concentration in the electrolyte of magnesium electrolyzers [J]. Russian Journal of Applied Chemistry, 2005, 78(8): 1276–1279.CrossRefGoogle Scholar
  4. [4]
    Krishnan A, Pal U B, Lu X G. Solid oxide membrane process for magnesium production directly from magnesium oxide[J]. Metallurgical and Materials Transactions B, 2005, 36(4): 463–473.CrossRefGoogle Scholar
  5. [5]
    Winny Wulandari, Geoffrey A.Brooks, Muhammad A.Rhamdhani. Magnesium: Current and alternative production routes[C], Chemeca 2010: Engineering at the Edge, 2010: 347–357.Google Scholar
  6. [6]
    Winand R, Gysel M V, Fontana A, Segers L, Carlier J C. Production of magnesium by vacuum carbothermic reduction of calcined dolomite [J]. Transactions of the Institution of Mining and Metallurgy Section C, 1990, 99: C105–C112.Google Scholar
  7. [7]
    Li Rong-ti., Pan Wei Sano M. Kinetics and mechanism of carbothermic reduction of magnesia [J]. Metallurgical and Materials Transactions B, 2003, 34B: 433–437.CrossRefGoogle Scholar
  8. [8]
    Brooks G, Trang S, Witt P, Khan M N H, Nagle M. The carbothermic route to magnesium[J]. JOM, 2006,58(5): 51–55.CrossRefGoogle Scholar
  9. [9]
    Tassios S, Barton T R D, Constanti-Carey K K, Nagle M W, Prentice L H. Manufacture of metal E.G. magnesium, involves performing carbothermal reduction of metal oxide, preventing reformation of metal oxide, and cooling stream using Nozzle heated with unit other than gas under specific condition[P]. WO2010012042-A1, 2010.Google Scholar
  10. [10]
    Donaldson A, Cordes R A. Rapid plasma quenching for the production of ultrafine metal and ceramic powders[J]. JOM, 2005, 57(4): 58–63.CrossRefGoogle Scholar
  11. [11]
    Abdellatif M. Review of the development work on the Mintek thermal magnesium process(MTMP)[J], The Journal of The South African Insitiute of Mining and Metallurgy, 2011, 111: 393–399.Google Scholar
  12. [12]
    Zuliani D J, Reeson D. Making magnesium a more cost and environmentally competitive option[C], Conference of Magnesium Alloy in Vancouver, 2012. (http://www.gossan.ca/pdfs/Conference9MagALLO Y-Paper-Vancouver-July2012.pdf)Google Scholar
  13. [13]
    HU Wen-xin, Liu Jian, Feng Nai-xiang, PENG Jian-ping. Vacuum thermal reduction kinetics of calcined dolomite with Al-Si-Fe alloy [J]. The Chinese Journal of Process Engineering, 2010, 10(1): 127–132. (in Chinese)Google Scholar
  14. [14]
    XIE Wei-dong, DANG Chun-mei, LI Zhao-nan, PENG Xiao-dong, WANG Hao. Preparation of Mg using Si-Cu reduction and its thermodynamics[J]. Chinese Journal of Rare Metals, 2012, 36(2): 213–217. (in Chinese)Google Scholar
  15. [15]
    Morsi I M, Barawy K A E, Morsi M B, Abdel-Gawad S R. Silicothermic reduction of dolomite ore under inert atmosphere[J]. Canadian Metallurgical Quarterly, 2002, 41:15–28.CrossRefGoogle Scholar
  16. [16]
    Holywell G C. Magnesium: the first quarter millennium[J]. JOM, 2005, 57: 26–33.CrossRefGoogle Scholar
  17. [17]
    WEN Ming, ZHANG Ting-an, DOU Zhi-he, REN Xiao-dong, ZHANG Rui, ZHOU Lian. Research on new type materials preparation for magnesium production by silicothermic process[J]. Magnesium Technology, 2013:75–79.Google Scholar
  18. [18]
    GUO Yunchun, YOU Guoqiang, LIU Yong. Research on oxidation characteristics of FeSi75 in silicothermic process [J]. Material & Heat Treatment, 2012, 41(6): 18–20.Google Scholar

Copyright information

© TMS (The Minerals, Metals & Materials Society) 2015

Authors and Affiliations

  • Daxue Fu
    • 1
  • Lukui Guan
    • 1
  • Ming Wen
    • 1
  • Zhi-he Dou
    • 1
  • Rui Zhang
    • 1
  • Ting-an Zhang
    • 1
  1. 1.Key Laboratory of Ecological Untilization of Multi-metal Intergrown Ores of Education MinistrySchool of Materials and Metallurgy of Northeastern UniversityShenyangChina

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