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Effect of Cr2O3 addition on oxidation induration and reduction swelling behavior of chromium-bearing vanadium titanomagnetite pellets with simulated coke oven gas

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Abstract

The oxidation induration and reduction swelling behavior of chromium-bearing vanadium titanomagnetite pellets (CVTP) with Cr2O3 addition were studied, and the reduction swelling index (RSI) and compressive strength (CS) of the reduced CVTP with simulated coke oven gas (COG) injection were investigated. The results showed that the CS of the CVTP decreases and the porosity of the CVTP increases with increasing amount of Cr2O3 added. The Cr2O3 mainly exists in the form of (Cr, Fe)2O3 solid solution in the CVTP and as Fe-Cr in the reduced CVTP. The CS of the reduced CVTP increases and the RSI of the reduced CVTP decreases with increasing amount of Cr2O3 added. The limited aggregation and diffusion of metallic iron contribute to the formation of dense lamellar crystals, which leads to the slight decrease for reduction swelling behavior of reduced CVTP. This work provides a theoretical and technical basis for the utilization of CVTP and other Cr-bearing ores such as chromite with COG recycling technology.

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Acknowledgements

This research was financially supported by the National Natural Science Foundation of China (Nos. 51674084, 51174051, and 51574082).

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Authors and Affiliations

  1. School of Metallurgy, Northeastern University, Shenyang, 110819, China

    Wei-dong Tang & Xiang-xin Xue

  2. School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan, 114051, China

    Song-tao Yang

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  1. Wei-dong Tang
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Correspondence to Song-tao Yang or Xiang-xin Xue.

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Tang, Wd., Yang, St. & Xue, Xx. Effect of Cr2O3 addition on oxidation induration and reduction swelling behavior of chromium-bearing vanadium titanomagnetite pellets with simulated coke oven gas. Int J Miner Metall Mater 26, 963–972 (2019). https://doi.org/10.1007/s12613-019-1813-x

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  • DOI: https://doi.org/10.1007/s12613-019-1813-x

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