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Study on Feasibility and Superiority of Preparing TiO2-Rich Burdens by Composite Agglomeration Process

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Abstract

Titanomagnetite concentrate is known for the difficulty of its sintering by traditional sintering process (TSP) because of a high content of TiO2. In this study, the feasibility study of blast furnace burden preparation was carried out by composite agglomeration process (CAP). The work in this study focuses on the effects of titanomagnetite concentrate ratio, composite basicity, and coke breeze dosage on agglomeration indexes of CAP. The calculation results of the pneumatics of sintered bed show that CAP optimizes the particle size distribution of the mixed feed and increases the voidage of the material layer, which improves the permeability index. Under the following experimental conditions (coke breeze dosage of 3.8 wt.%, pelletized feed proportion of 25%, and composite basicity of 1.76), a sintering yield of 73.60%, productivity of 1.58t·(m2 h), and RDI+3.15 of 76.76% have been achieved by CAP, which were 12.10%, 49.06%, and 16.71% higher than those by TSP, respectively. Under same conditions of composite basicity, agglomeration technical indexes of CAP are obviously better than those of TSP. CAP is an effective method to produce low-basicity sinter, which can reduce the proportion of acid pellets that cost more in blast furnace burden.

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Acknowledgement

The authors wish to express their thanks to National Key Research and Development Program of China (No. 22021YFC2902301) for the financial support for this research.

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Authors and Affiliations

  1. Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China

    Yanan Lu, Fang Yuan, Chi Wang & Yong Wang

  2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing, 100083, China

    Heng Zhou

  3. Faculty of Sciences, Melbourne TrACEES Platform and School of Chemistry, The University of Melbourne, Parkville, VIC, 3010, Australia

    Xiaofei Duan

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  1. Yanan Lu
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Lu, Y., Zhou, H., Yuan, F. et al. Study on Feasibility and Superiority of Preparing TiO2-Rich Burdens by Composite Agglomeration Process. JOM 75, 3424–3434 (2023). https://doi.org/10.1007/s11837-023-05998-x

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  • DOI: https://doi.org/10.1007/s11837-023-05998-x