Promote Alumina Leaching through Re-Pelleting: Effects of Directional Coating of Calcite on Silicate Grains
Abstract
:1. Introduction
2. Experimental
2.1. Experimental Materials
2.2. Experimental Instruments
2.3. Experimental Methods
- η, the leaching yield of Al2O3, SiO2, or Na2O, %;
- c, the concentration of Al2O3, SiO2, or Na2O in lixivium, g/L;
- Vol, the initial addition of water for leaching, L;
- M, the mass of the mixture before pregrinding, g;
- ω, the mass fraction of Al2O3, SiO2, or Na2O in the mixture before pregrinding, %.
3. Results and Discussion
3.1. Methods of Re-Pelleting
3.2. Pregrinding Fineness
3.3. Pulp Consistence of Pregrinding
4. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Composition | Fe2O3 | Al2O3 | SiO2 | TiO2 | MgO | CaO | Na2O | K2O | P2O5 | LOI |
---|---|---|---|---|---|---|---|---|---|---|
Contents/% (w/w) | 41.13 | 33.02 | 12.22 | 1.49 | 0.68 | 0.63 | 0.32 | 0.06 | 0.04 | 8.97 |
Component | Total Moisture (Mt) | Volatiles (Vad) | Ash (Aad)/% | Fixed Carbon (FCad) |
---|---|---|---|---|
Contents/% (w/w) | 9.16 | 39.42% | 5.07% | 46.35% |
Component. | SiO2 | Al2O3 | Fe2O3 | MgO | CaO | Na2O | K2O | TiO2 | P2O5 |
---|---|---|---|---|---|---|---|---|---|
Contents/% (w/w) | 38.0 | 21.37 | 36.19 | 1.9 | 7.15 | 0.43 | 1.38 | 0.84 | 0.41 |
Component | Al2O3 | SiO2 | Na2O |
---|---|---|---|
Mixing-grinding/% (w/w) | 86.78 | 3.21 | 72.13 |
Grinding-mixing/% (w/w) | 79.88 | 9.72 | 65.54 |
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Hu, W.; Qiu, Q.; Wei, X.; Wei, H.; Zhao, Q.; Yang, F.; Liu, X. Promote Alumina Leaching through Re-Pelleting: Effects of Directional Coating of Calcite on Silicate Grains. Minerals 2018, 8, 129. https://doi.org/10.3390/min8040129
Hu W, Qiu Q, Wei X, Wei H, Zhao Q, Yang F, Liu X. Promote Alumina Leaching through Re-Pelleting: Effects of Directional Coating of Calcite on Silicate Grains. Minerals. 2018; 8(4):129. https://doi.org/10.3390/min8040129
Chicago/Turabian StyleHu, Wentao, Qun Qiu, Xinlei Wei, Hong Wei, Qin Zhao, Feihua Yang, and Xinwei Liu. 2018. "Promote Alumina Leaching through Re-Pelleting: Effects of Directional Coating of Calcite on Silicate Grains" Minerals 8, no. 4: 129. https://doi.org/10.3390/min8040129