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- Title
Leaching of Titanium and Silicon from Low-Grade Titanium Slag Using Hydrochloric Acid Leaching.
- Authors
Wang, Lina; Qi, Tao; Chen, Desheng; Zhao, Hongxin; Liu, Yahui; Wang, Weijing; Zhao, Longsheng
- Abstract
Acid-leaching behaviors of the titanium slag obtained by selective reduction of vanadium-bearing titanomagnetite concentrates were investigated. It was found that the optimal leaching of titanium and silicon were 0.7% and 1.5%, respectively. The titanium and silicon in the titanium slag were firstly dissolved in the acidic solution to form TiO2+ and silica sol, and then rapidly reprecipitated, forming hydrochloric acid (HCl) leach residue. Most of the silicon presented in the HCl leach residue as floccules-like silica gel, while most of the titanium was distributed in the nano-sized rod-like clusters with crystallite refinement and intracrystalline defects, and, as such, 94.3% of the silicon was leached from the HCl leach residue by alkaline desilication, and 96.5% of the titanium in the titanium-rich material with some rutile structure was then digested by the concentrated sulfuric acid. This provides an alternative route for the comprehensive utilization of titanium and silicon in titanium slag.
- Subjects
TITANIUM; SILICON; SLAG leaching; HYDROCHLORIC acid; VANADIUM
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2018, Vol 70, Issue 10, p1985
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-018-2929-6