Recovery and Preparation of Potassium Fluorotantalate from High-Tantalum-Bearing Waste Slag by Pressure Alkaline Decomposition
Abstract
:1. Introduction
2. Experimental
2.1. Materials and Instruments
2.2. Procedure and Methods
3. Results and Discussion
3.1. Pressure Alkaline Decomposition of Ta Slag
3.1.1. Effect of Time on Decomposition
3.1.2. Effect of Oxygen Particle Pressure on Decomposition
3.1.3. Effect of the Liquid–Solid Ratio on Decomposition
3.1.4. Effect of Basicity on Decomposition
3.1.5. Effect of Temperature on Decomposition
3.2. Low-Acid Leaching of Alkali Decomposition Residue
3.3. Ta Extraction from the Low-Acid Leaching Solution
4. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Element | Ta | Nb | Ca | Ti | Si | Fe | Cu | Al |
---|---|---|---|---|---|---|---|---|
Content/% | 72.41 | 3.42 | 2.61 | 1.88 | 1.44 | 1.27 | 0.22 | 0.09 |
No. | Ta | Nb | Zr | Ca | Na | F | O | C | Ti | Al |
---|---|---|---|---|---|---|---|---|---|---|
1 | 74.08 | 0.18 | - | 1.45 | 0.48 | 4.12 | 15.1 | 4.59 | - | - |
2 | 55.74 | 2.68 | 3.24 | 5.01 | 1.1 | 9 | 12.38 | 10.85 | - | - |
3 | 24.01 | 1.17 | 1 | 2.21 | 0.5 | 4.54 | 7.19 | 59.39 | - | - |
4 | 8.88 | - | - | 0.48 | - | 1.5 | 30.09 | 10.12 | 0.86 | 48.07 |
5 | 12.69 | - | - | 1.1 | - | 3.48 | 5.33 | 77.4 | - | - |
6 | 76.08 | - | - | 2.29 | - | 5.72 | 11.52 | 4.4 | - | - |
Element | Input | Decomposition Liquor (1817 mL) | Decomposition Residue (629 g) | Low-Acid Leaching Liquor (2681 mL) | Low-Acid Leaching Residue (87.15 g) | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Weight (g) | Weight (g) | Concentration (g/L) | Distribution ratio (%) | Weight (g) | Content (%) | Distribution ratio (%) | Weight (g) | Concentration (g/L) | Distribution ratio (%) | Weight (g) | Concentration (%) | Distribution ratio (%) | |
Ta | 362.05 | 17.89 | 9.85 | 4.94 | 337.18 | 53.61 | 93.13 | 330.91 | 123.43 | 98.14 | 3.14 | 3.60 | 0.93 |
Nb | 17.1 | 0.93 | 0.51 | 5.44 | 16.29 | 2.59 | 95.27 | 15.68 | 5.85 | 96.26 | 0.29 | 0.33 | 1.78 |
Ca | 13.05 | 0.093 | 0.051 | 0.71 | 12.95 | 2.05 | 99.27 | 11.49 | 4.29 | 88.77 | 1.55 | 1.78 | 11.96 |
Ti | 9.4 | 1.79 | 0.99 | 19.04 | 8.18 | 1.30 | 87.07 | 5.49 | 2.04 | 67.11 | 2.96 | 3.39 | 36.16 |
Si | 7.2 | 4.33 | 2.38 | 60.14 | 3.25 | 0.52 | 45.23 | 3.00 | 1.11 | 92.13 | 0.44 | 0.50 | 13.51 |
Fe | 6.35 | 0.27 | 0.15 | 4.25 | 6.18 | 0.98 | 97.35 | 2.28 | 0.85 | 36.92 | 4.04 | 4.63 | 65.35 |
Cu | 1.1 | 0.075 | 0.041 | 6.82 | 1.04 | 0.16 | 94.8 | 0.49 | 0.18 | 47.24 | 0.6 | 0.68 | 57.54 |
Al | 0.45 | 0.42 | 0.23 | 93.33 | 0.065 | 0.010 | 14.63 | 0.044 | 0.016 | 66.25 | 0.02 | 0.023 | 30.38 |
HF Concentration (mol/L) | Operating Parameters | Stripping Solution (g/L) | |||||
---|---|---|---|---|---|---|---|
Ta | Nb | Fe | Ti | Ca | Si | ||
1 | Extraction: octanol, phase ratio O/A=1.5:1; Washing: 1.25 moL/L H2SO4, phase ratio O/A=1:0.25; Stripping: pure water, phase ratio O/A=1:1 | 77.38 | 0.024 | 0.0003 | 0.0004 | 0.0004 | 0.003 |
2 | 76.89 | 0.11 | 0.0009 | 0.0005 | 0.0008 | 0.009 | |
3 | 76.45 | 0.21 | 0.0005 | 0.0008 | 0.0007 | 0.013 |
Element | Ca | Cu | Cr | Fe | Mg | Mo | Nb | Ni | Pb | Si |
Content | - | <0.5 | <4 | <4 | <1 | <4 | <4 | <4 | <4 | <5 |
Element | Ti | W | Zr | Ca | Al | V | Sn | Zn | K2TaF7 | |
Content | <3 | <0.5 | <0.5 | <2 | <0.5 | <0.5 | <0.5 | <0.5 | >99.99% |
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Xie, K.; Wei, X.; Ye, L.; Wan, M.; Li, S.; Wu, J. Recovery and Preparation of Potassium Fluorotantalate from High-Tantalum-Bearing Waste Slag by Pressure Alkaline Decomposition. Metals 2022, 12, 648. https://doi.org/10.3390/met12040648
Xie K, Wei X, Ye L, Wan M, Li S, Wu J. Recovery and Preparation of Potassium Fluorotantalate from High-Tantalum-Bearing Waste Slag by Pressure Alkaline Decomposition. Metals. 2022; 12(4):648. https://doi.org/10.3390/met12040648
Chicago/Turabian StyleXie, Kangde, Xiuyu Wei, Longgang Ye, Mingyuan Wan, Shilin Li, and Jianguo Wu. 2022. "Recovery and Preparation of Potassium Fluorotantalate from High-Tantalum-Bearing Waste Slag by Pressure Alkaline Decomposition" Metals 12, no. 4: 648. https://doi.org/10.3390/met12040648