Abstract
The objective of this study is to evaluate the effect of temperature on the leachability of chromium in EAF slag. Mineral phase identification and micromorphology analysis were used to study the distribution of chromium in the EAF slag and the leaching residue. Sequential leaching tests were performed to study the chromium leachability in EAF slag under different temperature. The results show that the chromium in the EAF slag was mainly present in the Mg-Cr spinel, Fe–Cr alloy, or distributed in the form of oxide in the matrix phase-merwinite. In the sequential leaching process, the leachates under various temperatures were all alkaline and reductive. The release rates of chromium could reach their equilibrium values when the leaching time reached to 48 h, and the trivalent chromium was the predominant speciation of chromium in the leachates. The leachability of chromium in EAF slag decreased gradually with increasing temperature.
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Acknowledgements
The authors gratefully acknowledge the support of the National Natural Science Foundation of China (No: 51704119, NO: 51574108), the Hebei Natural Science Fund Project (E2017209243), and the School Funds for Distinguished Young Scientists (JQ201714).
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Wang, YJ., Li, JG., Zeng, YN., Gao, ZY. (2021). Effect of Temperature on the Leachability of Chromium in EAF Slag. In: Li, B., et al. Materials Engineering—From Ideas to Practice: An EPD Symposium in Honor of Jiann-Yang Hwang. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-65241-8_19
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