Effect of Cr<sub>2</sub>O<sub>3</sub> addition on oxidation induration and reduction swelling behavior of chromium-bearing vanadium titanomagnetite pellets with simulated coke oven gas

Wei-dong Tang; Song-tao Yang; Xiang-xin Xue

doi:10.1007/s12613-019-1813-x

Volume 26 Issue 8

Aug. 2019

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2019 > 26(8): 963-972

Wei-dong Tang, Song-tao Yang, and Xiang-xin Xue, 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(2019), No. 8, pp. 963-972. https://doi.org/10.1007/s12613-019-1813-x

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Wei-dong Tang, Song-tao Yang, and Xiang-xin Xue, 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(2019), No. 8, pp. 963-972. https://doi.org/10.1007/s12613-019-1813-x

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Research Article

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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Corresponding authors:
Song-tao Yang E-mail: yangsongtao1984@163.com

Xiang-xin Xue E-mail: xuexx@mail.neu.edu.cn
Received: 16 October 2018; Revised: 20 January 2019; Accepted: 28 February 2019

Abstract

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.
- chromium oxide;
- oxidation induration;
- reduction swellability;
- coke oven gas;
- chromium-bearing vanadium titanomagnetite pellets

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