Enhancing Fines Recovery by Hybrid Flotation Column and Mixed Collectors
Abstract
:1. Introduction
2. Materials and Methods
2.1. Experimental Set up-The Hybrid Flotation Column
2.2. Flotation Experiments
3. Results
3.1. Effect of Conditioning Time with Electrolytic Bubbles
3.2. Effect of pH and Collector Concentration on Combined Magnesite Flotation
3.3. Effect of Electrolyte Concentration on Combined Flotation
3.4. Particle Size Distribution of Froth Products
3.5. Flotation Mechanism
3.6. Flotation Kinetics Study
3.7. Synergistic Effect of Anionic/Non Ionic Collectors on Fine Magnesite Flotation
4. Conclusions
- The experimental results can be concluded as:
- The maximum treatment time of magnesite fine particles with electrolytic microbubbles with the optimal recovery was 20 min.
- Flotation experiments realized on the hybrid column with combined air showed an increase of about 8% in fines recovery. In addition, the particle size distribution of the recovered mineral showed an increase of about 37.4% in 0–5 μm particles compared to experiments conducted with dispersed air bubbles exclusively. To this end, it is distinct that the use of combined air favors the recovery of ultra-fine particles.
- The experimental data deriving from the kinetic study revealed that the experimental data follow the first-order model and furthermore that the particles of smaller particle size (−25 μm) are recovered faster than the other two fractions (−45 and −100 μm).The hybrid column kinetic study showed a 5% increase in the flotation rate of magnesite fines.
- The maximum ratios between sodium oleate and the non-ionic collectors were 5:95 and 25:75. In addition, maximum recovery was achieved when Dodecyl Alkoxylate 54 was utilized as the co-collector in a ratio of 25:75 increasing magnesite fines recovery by almost 12%.
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Kinetic Model | Magnesite Fraction | k (min−1) | Rmax (%) | R2 |
---|---|---|---|---|
First order | −100 μm | 0.61 ± 0.004 | 78.95 ± 1.83 | 0.990 |
−45 μm | 0.89 ± 0.11 | 78.27 ± 2.80 | 0.980 | |
−25 μm | 2.01 ± 0.19 | 87.17 ± 1.50 | 0.990 |
k (min−1) | Rmax (%) | kmb/kb | R2 | |
---|---|---|---|---|
In presence of microbubbles (mb) | kmb = 2.2 ± 0.2 | 85 ± 1.7 | 1.05 ± 0.4 | 0.983 |
Absence of microbubbles (b) | kb = 2.1 ± 0.2 | 80 ± 1.3 | 0.990 |
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Tsave, P.K.; Kostoglou, M.; Karapantsios, T.D.; Lazaridis, N.K. Enhancing Fines Recovery by Hybrid Flotation Column and Mixed Collectors. Minerals 2023, 13, 849. https://doi.org/10.3390/min13070849
Tsave PK, Kostoglou M, Karapantsios TD, Lazaridis NK. Enhancing Fines Recovery by Hybrid Flotation Column and Mixed Collectors. Minerals. 2023; 13(7):849. https://doi.org/10.3390/min13070849
Chicago/Turabian StyleTsave, Polyxeni K., Margaritis Kostoglou, Thodoris D. Karapantsios, and Nikolaos K. Lazaridis. 2023. "Enhancing Fines Recovery by Hybrid Flotation Column and Mixed Collectors" Minerals 13, no. 7: 849. https://doi.org/10.3390/min13070849