Document Type
Article
Publication Date
12-1-2020
Department
College of Forest Resources and Environmental Science
Abstract
In this study, Zn/Cu-bearing smelting slag was recycled via an integrated acid dissolution and hematite precipitation method. The slag was dissolved in nitric acid to generate an acid solution containing 23.5 g/L Fe, 4.45 g/L Zn and 2.81 g/L Cu, which was subjected to hydrothermal treatment with the addition of levulinic acid (LA). More than 99.95% of the initial Fe content was removed as hematite particles with diameters of approximately 200 nm, and the residual Fe concentration in the acid was 0.43 mg/L. The generated hematite contained 97.3% Fe2O3, 0.64% ZnO and 0.58% CuO. Greater than 99% of the initial Zn and Cu was retained in the acid and further precipitated as Zn/Cu-bearing solids by adjusting the solution pH to 9. The precipitated Zn/Cu-bearing solids contained 33.6% Zn and 21.7% Cu, whereas the Fe content was less than 0.2%. This paper is the first report of an environmentally friendly approach for recycling smelting slag without generating any hazardous waste.
Publication Title
Scientific Reports
Recommended Citation
Huo, Y.,
Song, X.,
Zhu, S.,
Chen, Y.,
Lin, X.,
Wu, Y.,
Qu, Z.,
Su, T.,
&
Xie, X.
(2020).
High-purity recycling of hematite and Zn/Cu mixture from waste smelting slag.
Scientific Reports,
10(1).
http://doi.org/10.1038/s41598-020-66077-8
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/2070
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Version
Publisher's PDF
Publisher's Statement
© 2020, The Author(s). Publisher’s version of record: https://doi.org/10.1038/s41598-020-66077-8