Jun Chang, Jin-hui Peng
The leaching of indium from refractory zinc oxide flue dust (ZOFD) is attempted to utilize a microwave sulfating roasting process, followed by water leaching. The ZOFD and roasted product were characterized by XRD and SEM/EDS analysis. The effects of various roasting parameters, such as roasting temperature/duration, the proportion of sulfuric acid, as well as the leaching parameters such as the leaching duration and liquid/solid ratio, were assessed. The results indicate that nearly 97% of indium could be leached under the following conditions: mass ratio of concentrated sulfuric acid to ZOFD to be 0.5, roasting temperature of 150 ℃ and duration of 1.5 hours; while the optimal leaching conditions hold at temperature of 25 ℃ for 1 hour, with 4:1 of liquid/solid ratio. The indium leaching rate by the microwave roasting increased by 8% as compared with the conventional roasting process under identical conditions.
@article{3cd0a66b-0c38-415c-843c-85e85dc610b2,
title={Extraction of indium from zinc oxide flue dust by microwave sulfation roasting and water leaching},
author={Jun Chang and Jin-hui Peng},
year={2026},
language={en}
}TY - JOUR TI - Extraction of indium from zinc oxide flue dust by microwave sulfation roasting and water leaching AU - Jun Chang AU - Jin-hui Peng PY - 2026 LA - en ER -
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