Roasting of lepidolite to extract lithium3.2.1. Effect of FeS/Li molar ratio. The formation of SO 2 /SO 3 gases during the oxidation of FeS in air is believed to be the key factor controlling the extraction of lithium from lepidolite via a gas–solid interaction as proposed by Luong et al. (2014) and Li et al., 2010, Li et al., 2011.
Recently, a scheme using FeSO 4 ·7H 2 O to extract lithium from a Korean lepidolite ore was also examined (Luong et al., 2014). It was believed that SO 2 /SO 3 gases generated from the decomposition of such ferrous sulphate play a key role in the extraction of Li from lepidolite via a gas–solid interaction.
DOI: 10.1016/J.MINPRO.2012.03.005 Corpus ID: 97750945; Extraction of lithium from lepidolite by sulfation roasting and water leaching @article{Yan2012ExtractionOL, title={Extraction of lithium from lepidolite by sulfation roasting and water leaching}, author={Qunxuan Yan and Xinhai Li and Zhixing Wang and X. Q. Wu and Jiexi Wang …
DOI: 10.1016/J.HYDROMET.2018.10.020 Corpus ID: 104931109; Enhanced acid treatment to extract lithium from lepidolite with a fluorine-based chemical method @article{Guo2019EnhancedAT, title={Enhanced acid treatment to extract lithium from lepidolite with a fluorine-based chemical method}, author={Hui Guo and Ge Kuang and …
To extract lithium from spodumene, ... (2017) demonstrated the that mechanical activation improves the lithium recovery from lepidolite ores at relatively low temperatures ranging from 100 to 140 °C. It may seem prohibitively expensive to use mechanochemical treatment that may deploy excessive milling techniques, but this …
Hui Guo, et al. Enhanced acid treatment to extract lithium from lepidolite with a fluorine-based chemical method[J]. Hydrometallurgy 183(2019): 9-19. [13] Kuang G, Li H, Hu S, et al. Recovery of aluminium and lithium from gypsum residue obtained in the process of lithium extraction from lepidolite[J]. Hydrometallurgy, 2015, 157:214-218 ...
Currently, the sulfate method used for roasting lepidolite to extract lithium presents several issues, including high energy consumption and low recovery efficiency. To address these limitations, we have employed microwave external fields to enhance lithium extraction and modified the roasting process. Microwave-enhanced roasting reduces …
This study concerns the feasibility of extracting lithium and separating aluminum from lepidolite leaching solution by nanofiltration. Four commercial nanofiltration (NF) membranes (DK, DL, NF270, and Duracid NF) were chosen to investigate ion separation performance in simulated lepidolite leaching solution. …
The lithium extraction from lepidolite often incurs higher costs owing to low utilization of other metals contained in the lepidolite 9. Numerous new procedures …
The chlorination roasting process was also introduced to extract lithium from lepidolite; the ore was roasted with chloride salts (CaCl 2, NaCl, NH 4 Cl, etc.) or in the …
The most important processes for the extraction of lithium from lepidolite are the sulfate acid and the lime methods (Distin and Phillips, 1982). However, the extraction of lithium by sulfate acid method uses high concentration acid and the purification procedure is complex. The lime process uses limestone and requires a large …
Lepidolite is an important lithium resource in China. The development of efficient lithium extraction process is of great significance to ensuring the sustainable development of lithium industry. Due to the strong electronegativity of fluorine(F), about 5%~10% of F attacks the lepdolite lattice by taking interfacial hydroxyl groups. It is critical for the clean …
Sulfuric acid method can effectively extract lithium from lepidolite. However, purification problems make the method still tough before being widely applied. Especially, a considerable amount of Al3+ is contained in leaching solution, which needs to be removed before Li2CO3 precipitation. Based on the characteristic that K+, Rb+, and …
A new comprehensive way to extract lithium and potassium from lepidolite through calcination process with the additive of K2CO3 has been proposed. By using flowing water vapor, the lepidolite ...
A novel technique was developed to extract lithium from lepidolite. The lepidolite was pre-roasted at a high temperature with water steam atmosphere for defluorination. Then the defluorinated lepidolite was leached in a lime–milk autoclave. Various parameters including the defluorination percentage of lepidolite, milling time, …
Mixed grinding with Na2S followed by water leaching was performed to extract Li from lepidolite. The leachability of Li increases dramatically in the ground …
A new comprehensive way to extract lithium and potassium from lepidolite through calcination process with the additive of K2CO3 has been proposed. By using flowing water vapor, the lepidolite ...
Three different potassium compounds, namely K2SO4, KOH, and K2SO4 + KOH, were used as additives to extract lithium from lepidolite by roasting and water leaching. The effect of the additive/ore ...
The fluorine-based chemical method shows great potential in leaching lithium (Li) from lepidolite. Leaching kinetics of Li in a mixture of sulfuric acid and hydrofluoric acid, which is a typical lixivant for the fluorine-based chemical method, was carried out under crucial factors such as different HF/ore ratios (1:1–3:1 g/mL) and leaching …
This paper presented a combined process which could extract lithium and rubidium from lepidolite thoroughly: (1) Thermal activation of the lepidolite, (2) Forced …
Our patented L‑Max ® and LOH‑Max ® technologies extract lithium from lepidolite, other lithium mica minerals and the high-grade lithium phosphate mineral, amblygonite. They open up a much needed and far less contested mineral supply than traditional spodumene and brine sources. These processes operate at atmospheric pressure and modest …
Lepidolite is an important lithium resource in China. The development of efficient lithium extraction process is of great significance to ensuring the sustainable development of lithium industry. Due to the strong …
Lithium is considered to be the most important energy metal of the 21st century. Because of the development trend of global electrification, the consumption of lithium has increased significantly over the last decade, and it is foreseeable that its demand will continue to increase for a long time. Limited by the total amount of lithium …
Content of the lithium in lepidolite was determined by AAS as 1.21%. ... (NH 4) 2 SO 4 —5 g, MgSO 4 —0.34 g and yeast extract 7 g. Poor medium consist of glucose—5 g and ...
Lithium extraction from lepidolite usually adopts the sulfate process in China. Lithium carbonate is obtained by calcining lepidolite (800–1000°C) in a certain …
from hard rock lithium minerals. SGS offers a multi-disciplinary team that is involved from the initial stages of the characterization of the lithium deposit to the production of a market sample of a high grade lithium product. SGS provides the comprehensive range of testwork capabilities required to extract lithium. These capabilities include:
Three different potassium compounds, namely K2SO4, KOH, and K2SO4 + KOH, were used as additives to extract lithium from lepidolite by roasting and water leaching. The effect of the additive/ore ...
Quebracho extract has been used to depress quartz during flotation of spodumene with oleate (Browning and McVay, 1961). There is limited literature on the use of depressants in spodumene flotation. ... Starches and Na 2 S are depressants for lepidolite while sodium silicate and lithium sulphate can be used as a lepidolite …
This paper reviews the recent technological developments in the extraction of lithium from natural resources. Existing methods are summarized by the main …
Sulfuric acid method can effectively extract lithium from lepidolite. However, purification problems make the method still tough before being widely applied. Especially, a considerable amount of Al3+ is contained in leaching solution, which needs to be removed before Li 2CO 3
Lepidolite is a mineral with Li content (1.39–3.58 wt%) [ 5 ]. Structural characterization and determination of the elements present for the purification of alkali …
Yan et al. (2012b) employed the chlorination roasting-water leaching process to extract lithium from lepidolite, achieving a final lithium leaching efficiency of 92.86% at a roasting temperature of 880 °C. However, this method generates acidic gases, like chlorine, leading to significant environmental pollution.
The fluorine-based chemical method shows great potential in leaching lithium (Li) from lepidolite. Leaching kinetics of Li in a mixture of sulfuric acid and hydrofluoric acid, which is a typical lixivant for the fluorine-based chemical method, was carried out under crucial factors such as different HF/ore ratios (1:1–3:1 g/mL) and …
The technological demand for lithium is high and increasing. Many of the ores for lithium extraction present low-grade alkali metals in different associations. The methods to extract lithium from the mentioned sources, and their monitoring, gain importance. A multi-technique methodology to chemically-structurally characterize the …
The chlorination roasting process was also introduced to extract lithium from lepidolite; the ore was roasted with chloride salts (CaCl 2, NaCl, NH 4 Cl, etc.) or in the presence of HCl/Cl 2 gas ...
To extract Li from lepidolite, the concentrate was first mixed with Na 2 SO 4 at different molar ratios of Na 2 SO 4 to Li and then roasted at a selected temperature for a range of durations from 0.5 h to 2 h. Mixtures of lepidolite and Na 2 SO 4 were poured into ceramic crucibles, then placed in a pre-heated furnace at 850 °C, 900 °C or 1000 ...
The recovery and leaching kinetics of lithium from lepidolite by sulfuric acid method were investigated in this study, and a new method of nanofiltration to separate Al/Li from lepidolite leaching ...