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Experimental Study on Hot Metal Desulfurization Using Sintered Red Mud-Based Flux

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Abstract

This research presents the results of laboratory and pilot-scale tests conducted on the use of sintered red mud (RM)-based flux in the hot metal desulfurization (HMD) process. Al2O3/Na2O in RM can decrease the melting point of lime-based slag and can work as a flux in the HMD process. Good slag fluidity was observed throughout the process, and high desulfurization rates (~80%) with a low final S content (<0.02%) were experimentally obtained when the RM:CaO ratio was between 1.2:1 and 2.4:1. The pilot-scale test results indicated that a desulfurization rate as high as 91% and a S content <0.0099% could be acquired when RM:lime = 1:1, verifying the feasibility of using sintered RM-based flux in HMD. The data obtained provide important information for promoting the large-scale application of sintered RM in steelmaking.

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Acknowledgements

The authors would like to thank the National Natural Science Foundation of China (No. 51474021) and the Aluminum Corporation of China Limited for financial support.

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Authors and Affiliations

  1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Xueyuan Road 30, Haidian District, Beijing, 100083, People’s Republic of China

    Fengshan Li, Yanling Zhang & Zhancheng Guo

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  1. Fengshan Li
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  2. Yanling Zhang
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  3. Zhancheng Guo
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Correspondence to Yanling Zhang.

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Li, F., Zhang, Y. & Guo, Z. Experimental Study on Hot Metal Desulfurization Using Sintered Red Mud-Based Flux. JOM 69, 1632–1638 (2017). https://doi.org/10.1007/s11837-017-2454-z

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  • DOI: https://doi.org/10.1007/s11837-017-2454-z

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