TY - JOUR
T1 - Numerical Simulation and Experimental Study of Shear-Enhanced Goethite Process for Iron Removal
AU - Nan, Tianxiang
AU - Yang, Jianguang
AU - Zeng, Weizhi
AU - Zhu, Qiang
AU - Tang, Shiyang
AU - Tang, Chaobo
AU - Lundström, Mari
N1 - Funding Information:
This work was supported financially by the National Key Research and Development Program of China (Grant No. 2018YFC1900403), the Postgraduate Scientific Research Innovation Project of Hunan Province (Grant No. CX20210197), the Fundamental Research Funds for the Central Universities of Central South University (Grant No. 2021zzts0115). The authors are grateful to the China Scholarship Council for financial support (Grant No. 202206370103).
Publisher Copyright:
© 2023, The Minerals, Metals & Materials Society.
PY - 2023/9
Y1 - 2023/9
N2 - A shear-enhanced method based on strong homogenization was proposed and applied in the goethite process for iron removal from the zinc process solution to overcome the low reaction efficiency and the difficulty in residue filtration. A 3D shear-enhanced rector model was designed, and the process was simulated to reveal the characteristics of fluid flow, gas mass transfer, and goethite particle movement under the coupling multi-physical field at different shearing speeds. The results showed that the homogenization of the solution in the reactor is improved by increasing the flow rate of fluids. The gas dispersion is strengthened to increase the mass transfer rate, further accelerating the iron removal reaction. In addition, after iron precipitation, the formed goethite particles and grains can be broken and refined at a high shearing speed. Zinc in the iron precipitation residue is present in adsorption instead of incorporation, indicating fewer zinc losses. Finally, the reliability of the model was verified by experiments. The shear-enhanced goethite process was suggested to improve iron removal efficiency, and it obtains the iron precipitation residue with the crystal structure of α-FeOOH, suggesting further good filtration performance in the following solid/liquid separation stages.
AB - A shear-enhanced method based on strong homogenization was proposed and applied in the goethite process for iron removal from the zinc process solution to overcome the low reaction efficiency and the difficulty in residue filtration. A 3D shear-enhanced rector model was designed, and the process was simulated to reveal the characteristics of fluid flow, gas mass transfer, and goethite particle movement under the coupling multi-physical field at different shearing speeds. The results showed that the homogenization of the solution in the reactor is improved by increasing the flow rate of fluids. The gas dispersion is strengthened to increase the mass transfer rate, further accelerating the iron removal reaction. In addition, after iron precipitation, the formed goethite particles and grains can be broken and refined at a high shearing speed. Zinc in the iron precipitation residue is present in adsorption instead of incorporation, indicating fewer zinc losses. Finally, the reliability of the model was verified by experiments. The shear-enhanced goethite process was suggested to improve iron removal efficiency, and it obtains the iron precipitation residue with the crystal structure of α-FeOOH, suggesting further good filtration performance in the following solid/liquid separation stages.
UR - http://www.scopus.com/inward/record.url?scp=85161822583&partnerID=8YFLogxK
U2 - 10.1007/s11837-023-05933-0
DO - 10.1007/s11837-023-05933-0
M3 - Article
AN - SCOPUS:85161822583
SN - 1047-4838
VL - 75
SP - 4024
EP - 4038
JO - JOM
JF - JOM
IS - 9
ER -