Extraction of lithium from lepidolite via iron sulphide roasting and water leaching

被引：81

作者：

Thi Thu Hien-Dinh ^{[1
]}

Van Tri Luong ^{[2
]}

Giere, Reto ^{[3
]}

Tam Tran ^{[2
]}

机构：

[1] Univ Freiburg, Inst Earth & Environm Sci, D-79104 Freiburg, Germany

[2] Chonnam Natl Univ, Dept Energy & Resources Engn, Gwangju 500757, South Korea

[3] Univ Penn, Dept Earth & Environm Sci, Philadelphia, PA 19104 USA

来源：

HYDROMETALLURGY | 2015年 / 153卷

关键词：

Lithium; Lepidolite; Roasting; Leaching; Iron sulphide; HSC modelling; ZINNWALDITE; SPODUMENE; WASTE;

D O I：

10.1016/j.hydromet.2015.03.002

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

In this study, lithium was recovered from lepidolite via iron sulphide (FeS)-CaO roasting and water leaching. The thermodynamics taking place during the roasting of lepidolite and the additives was simulated by using the HSC programme. The simulation indicates that SO2/SO3 formed from the oxidation of FeS plays an important role in extracting lithium from lepidolite. Roasting at 750 degrees C using FeS/Li and Ca/F molar ratios of 5:1 and 1:1, respectively, followed by leaching at 50 degrees C using water/calcine mass ratios of >5:1 could yield a maximum of 81% Li recovery (at <1 g/L Li concentration). It was found that 71.5% of S was liberated into the atmosphere, resulting in lower extraction of Li and more diluted leach liquors compared to those obtained during closed-system roasting of lepidolite and Fe sulphate mixes. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：154 / 159

页数：6

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