Extraction of scandium from Sc-bearing V-Ti magnetite tailings using roasting and leaching

被引：3

作者：

Xiao J.-H. ^{[1
,2
,3
,4
]}

Peng Y. ^{[1
]}

Chen T. ^{[1
]}

Zou K. ^{[1
]}

Ding W. ^{[1
]}

机构：

[1] School of Environment and Resources, Southwest University of Science and Technology, Mianyang

[2] Sichuan Provincial Engineering Laboratory of Non-Metallic Mineral Powder Modification and High-Value Utilization, Southwest University of Science and Technology, Mianyang

[3] Key Laboratory of Sichuan Province for Comprehensive Utilization of Vanadium and Titanium Resources, Panzhihua

[4] Key Laboratory of Ministry of Education for Solid Waste Treatment and Resource Recycle, Southwest University of Science and Technology, Mianyang

来源：

Xiao, Jun-Hui (xiaojunhui33@163.com) | 1611年 / Central South University of Technology卷 / 31期

关键词：

Leaching; Roasting; Sc; Sc-bearing V-Ti magnetite tailings;

D O I：

10.11817/j.ysxb.1004.0609.2021-36561

中图分类号：

学科分类号：

摘要：

The chlorination roasting and alkali decomposition roasting were used to pre-treat coarse scandium concentrate (Sc2O3 content of 44 g/t) to strengthen the transformation of crystal structure of scandium-bearing minerals and create favorable conditions for further leaching scandium from roasting slag. The results show that scandium leaching efficiency of 84.32% is obtained, and the content of Sc2O3 in the leaching residue is 8.67 g/t under the compressive conditions of alkali decomposition roasting-leaching process as follows: mass ratio of Na2CO3 to coarse of 0.45, roasting temperature of 900 ℃, roasting time of 120 min, hydrochloric acid mass ratio of leaching liquid to solid ratio (R) 5:1, hydrochloric acid concentration of 6 mol/L, two-stage leaching for 240 min. XRD, SEM-EDS and chemical composition analysis results of the leaching residue show that, after leaching, the physical image spectral peaks of pyroxene, hornblende and other aluminate minerals in scandium coarse concentrate disappear, and the spectral peaks of NaCl, CaTiO3 and Fe2O3 appear, and there is no obvious spectral peak of scandium metal. It is also further verified that the alkali decomposition roasting can effectively destroy the crystal structure of the mineral, and the scandium ion in the enhanced interlayer structure of the mineral is released. It is helpful for hydrochloric acid leaching of roasting slag to produce SCCl3 and improve the leaching rate of scandium obviously. © 2021, Science Press. All right reserved.

引用

页码：1611 / 1620

页数：9

共 21 条

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