Next Article in Journal
Optimum Design of a Standalone Solar Photovoltaic System Based on Novel Integration of Iterative-PESA-II and AHP-VIKOR Methods
Next Article in Special Issue
Green Separation and Extraction Processes: Part I
Previous Article in Journal
A Review of Exergy Based Optimization and Control
Previous Article in Special Issue
Phytochemical Compounds of Branches from P. halepensis Oily Liquid Extract and S. terebinthifolius Essential Oil and Their Potential Antifungal Activity
Open AccessArticle

Recovering Scandium from Scandium Rough Concentrate Using Roasting-Hydrolysis-Leaching Process

by Junhui Xiao 1,2,3,*, Yang Peng 1,3, Wei Ding 1,3, Tao Chen 1,3, Kai Zou 1,3 and Zhen Wang 1,3
1
Sichuan Engineering Lab of Non-Metallic Mineral Powder Modification and High-Value Utilization, Southwest University of Science and Technology, Mianyang 621010, China
2
Key Laboratory of Sichuan Province for Comprehensive Utilization of Vanadium and Titanium Resources, Panzhihua University, Panzhihua 61700, China
3
Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang 621010, China
*
Author to whom correspondence should be addressed.
Processes 2020, 8(3), 365; https://doi.org/10.3390/pr8030365
Received: 20 February 2020 / Revised: 18 March 2020 / Accepted: 18 March 2020 / Published: 22 March 2020
(This article belongs to the Special Issue Green Separation and Extraction Processes)
In this study, a roasting-hydrolysis-acid leaching process is used to extract scandium from the scandium rough concentrate. The scandium rough concentrate containing Sc2O3 of 76.98 g/t was obtained by magnetic separation, gravity separation, and electric separation from Sc-bearing Vi-Ti magnetite tailings in the Panxi area of China. The majority of scandium in scandium rough concentrate mainly occurs in diopside, titanopyroxene, montmorillonite, chlorite, talc, aluminosilicate minerals, and isomorphism. Sodium salt and scandium coarse concentrate are added into the roasting furnace for roasting, which makes the fusion reaction of silicon, aluminum and sodium salt to produce soluble salts such as sodium silicate and sodium metaaluminate. Scandium is further recovered from the hydrolysis residue by acid leaching. Test results show scandium leaching recovery of 95.12% and the acid leaching residue with Sc2O3 content of 8.12 g/t are obtained, while the extraction of scandium is obvious. There is no obvious peak value of Scandium spectrum in hydrochloric acid leach residue. Most of scandium in hydrolytic residue is dissolved into Sc3+ and enters into the liquid phase. The main minerals in leach residue are perovskite, ferric silicate, and olivine. View Full-Text
Keywords: scandium; scandium rough concentrate; roasting; hydrolysis; leaching scandium; scandium rough concentrate; roasting; hydrolysis; leaching
Show Figures

Figure 1

MDPI and ACS Style

Xiao, J.; Peng, Y.; Ding, W.; Chen, T.; Zou, K.; Wang, Z. Recovering Scandium from Scandium Rough Concentrate Using Roasting-Hydrolysis-Leaching Process. Processes 2020, 8, 365.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop