Recovery of Gallium from Corundum Flue Dust by Two-Stage Alkali Leaching, Carbonation, Acid Leaching and Solvent Extraction Process
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials and Reagents
2.2. Experimental Procedure
2.2.1. Leaching
2.2.2. Solvent Extraction
2.3. Analysis Method
3. Results and Discussion
3.1. Characterization of Corundum Flue Dust
3.2. Alkali Leaching
3.2.1. Effect of Alkali-to-Ore Mass Ratio
3.2.2. Effect of Leaching Temperature
3.2.3. Effect of Reaction Time of the First Alkali Leaching Stage (Concentrated Alkali Leaching Stage)
3.2.4. Effect of (L/S)1 (L/S for Concentrated Alkali Leaching)
3.2.5. Effect of (L/S)2 (L/S for Dilute Alkali Leaching)
3.3. Carbonation and Acid Leaching
3.4. Solvent Extraction
4. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Compounds and Elements | Content/wt. % |
---|---|
MgO | 0.26 |
CaO | 0.13 |
Fe2O3 | 3.52 |
Al2O3 | 18.97 |
SiO2 | 56.65 |
Ga | 0.15 |
K2O | 4.39 |
Na2O | 1.36 |
Loss on ignition | 14.22 |
Test Parameters and Result | Value |
---|---|
Alkali-to-ore mass ratio | 1.2:1 |
Temperature | 80 °C |
Reaction Time (1st + 2nd stage) | 120 min + 30 min |
L/S for the 1st alkali leaching stage | 1.5:1 |
L/S for the 2nd alkali leaching stage | 8:1 |
Leaching efficiency | 93.6% |
Element | Concentration/wt. % |
---|---|
Ga | 0.468 |
Si | 0.110 |
Al | 1.823 |
Fe | 0.244 |
Test Parameters and Results | Value |
---|---|
Extraction | - |
Solvent | 25% N235 + 5% 1-Decanol + 70% kerosene |
A/O | 4.5:1 |
Temperature | Ambient temperature |
Extraction efficiency (Ga) | 99.8% |
Extraction efficiency (Fe) | 99.1% |
Stripping | - |
Stripping agent | 1% NaOH solution |
A/O | 1:1 |
Temperature | Ambient temperature |
Stripping efficiency (Ga) | 97.4% |
Stripping efficiency (Fe) | 96.5% |
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Wen, K.; Jiang, F.; Zhou, X.; Sun, Z. Recovery of Gallium from Corundum Flue Dust by Two-Stage Alkali Leaching, Carbonation, Acid Leaching and Solvent Extraction Process. Metals 2018, 8, 545. https://doi.org/10.3390/met8070545
Wen K, Jiang F, Zhou X, Sun Z. Recovery of Gallium from Corundum Flue Dust by Two-Stage Alkali Leaching, Carbonation, Acid Leaching and Solvent Extraction Process. Metals. 2018; 8(7):545. https://doi.org/10.3390/met8070545
Chicago/Turabian StyleWen, Kang, Feng Jiang, Xiangyang Zhou, and Zhaoming Sun. 2018. "Recovery of Gallium from Corundum Flue Dust by Two-Stage Alkali Leaching, Carbonation, Acid Leaching and Solvent Extraction Process" Metals 8, no. 7: 545. https://doi.org/10.3390/met8070545