Abstract
Stainless steel has a broad application in various areas of the national economy, while a mass of stainless-steel scraps is generated during the abrasive machining process. These scraps are rich in metallic ingredients such as Fe, Ni, and Cr, which shows an extremely comprehensive recovery value. Due to good plasticity and ductility, the stainless-steel scraps are hard to grind to fine particles. The low dissolution efficiency of coarse particles limits the efficient utilization of stainless-steel scraps. This work provides a clean and intensifying acid leaching method of Fe, Ni, and Cr from stainless-steel scraps via ultrasonic treatment. Under the conditions of ultrasound power of 540W, H2SO4 concentration of 3 mol/L, leaching time of 15 min, temperature of 30 °C, and liquid-to-solid ratio of 20:1, the leaching efficiencies of Fe, Ni, and Cr are 99.93, 99.91, and 99.92%, which are much higher than those with the conventional leaching process.
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Acknowledgements
The authors wish to express their thanks to the National Natural Science Foundation of China (No. 52174263), Natural Science Foundation of Henan Province (No. 222300420075, 222301420030), the Innovative Talents Supporting Plan in Universities of Henan Province (No. 23HASTIT004) for the financial support, and the Project of Zhongyuan Critical Metals Laboratory (No. GJJSGGYQ202323).
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© 2024 The Minerals, Metals & Materials Society
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Zhang, Y., Chu, Q., Liu, B., Han, G., Huang, Y. (2024). Intensifying Acid Leaching Behaviors of Fe, Ni, and Cr from Stainless-Steel Scraps via Ultrasonic Treatment. In: Peng, Z., et al. Characterization of Minerals, Metals, and Materials 2024. TMS 2024. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-50304-7_51
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DOI: https://doi.org/10.1007/978-3-031-50304-7_51
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