Preparation of MgO bearing pellets and the application for blast furnace

  • CHUN Tiejun School of Metallurgical Engineering, Anhui University of Technology, Ma'anshan, Anhui, China
  • MU Gutian School of Metallurgical Engineering, Anhui University of Technology, Ma'anshan, Anhui, China
  • MENG Qingmin School of Metallurgical Engineering,Anhui University of Technology, Ma'anshan, Anhui, China
  • LONG Hongming School of Metallurgical Engineering, Anhui University of Technology;Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Ministry of Education, Anhui University of Technology, Ma'anshan, Anhui, China
  • BI Chuanguang Technological center,Shanghai Meishan Iron and Steel Co., Let, Nanning, Jiangsu, China

Abstract


Abstract

The preparation of MgO bearing pellets in the mini and pilot scales and the application for 4070m3 blast furnace were conducted in this paper. The results show that with increasing the MgO content, the compressive strength of fired pellets decreased significantly, while the metallurgical performances, such as RI (reducibility index), RDI (reduction degradation index) and RSI (reduction swelling index) were improved. The scanning electron microscope with energy dispersive spectrometry was used to test the microstructures and the compositions of iron oxide and slag of pellets. With increasing the MgO content, MgO exists in the form of magnesium ferrite and monticellite, which presents the high melting temperature, decreasing the content of liquid phase. The pilot scale experiment was performed on a commercial running grate-rotary kiln with the annual output of 2.4 million tons pellets, which agrees the results obtained in the mini scale experiment. The application of MgO-bearing pellets was carried out in the 4070m3 blast furnace of Meisteel China, and the production indexes improved with increasing the yield and reducing the coke ratio and the total benefits are 7067 USD/d, which presents the superior economic benefits.

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Published
2019/07/25
How to Cite
Tiejun, C., Gutian, M., Qingmin, M., Hongming, L., & Chuanguang, B. (2019). Preparation of MgO bearing pellets and the application for blast furnace. Journal of Mining and Metallurgy, Section B: Metallurgy, 55(2), 167. Retrieved from https://aseestant.ceon.rs/index.php/jmm/article/view/19711
Issue
Vol. 55 No. 2 (2019)
Section
Original Scientific Paper

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