Effect of Humic Acid Binder on Oxidation Roasting of Vanadium–Titanium Magnetite Pellets via Straight-Grate Process
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Methods
2.2.1. Balling Process
2.2.2. Oxidation Roasting Process
3. Results and Discussion
3.1. Effects of Preheating and Firing Parameters on Fired VTM Pellet Quality
3.2. Microstructure and Phase Analysis
3.3. Metallurgical Properties
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
- Kawatra, S.K.; Claremboux, V. Iron Ore Pelletization: Part I. Fundamentals. Miner. Process. Extr. Metall. Rev. 2021, 1–16. [Google Scholar] [CrossRef]
- Halt, J.A.; Roache, S.C.; Kawatra, S.K. Cold Bonding of Iron Ore Concentrate Pellets. Miner. Process. Extr. Metall. Rev. 2015, 36, 192–197. [Google Scholar] [CrossRef]
- Lu, J.; Zhao, X.; Yuan, Z.; Gao, P.; Li, L. Characterization of the Bonding Effect of Nano-CaCO3 Modified CMC on Magnetite Concentrate Pellets. JOM 2019, 71, 2549–2555. [Google Scholar] [CrossRef]
- Kawatra, S.K.; Claremboux, V. Iron Ore Pelletization: Part II. Inorganic Binders. Miner. Process. Extr. Metall. Rev. 2021, 1–20. [Google Scholar] [CrossRef]
- Mohamed, O.A.; Shalabi, M.E.H.; El-Hussiny, N.A.; Khedr, M.H.; Mostafa, F. The role of normal and activated bentonite on the pelletization of barite iron ore concentrate and the quality of pellets. Powder Technol. 2003, 130, 277–282. [Google Scholar] [CrossRef]
- Wang, C.; Xu, C.; Liu, Z.; Wang, Y.; Wang, R.; Ma, L. Effect of organic binders on the activation and properties of indurated magnetite pellets. Int. J. Miner. Metall. Mater. 2021, 28, 1145–1152. [Google Scholar] [CrossRef]
- Halt, J.A.; Kawatra, S.K. Review of organic binders for iron ore concentrate agglomeration. Min. Metall. Explor. 2014, 31, 73–94. [Google Scholar] [CrossRef]
- Lu, S.; Yuan, Z.; Zhang, C. Binding mechanisms of polysaccharides adsorbing onto magnetite concentrate surface. Powder Technol. 2018, 340, 17–25. [Google Scholar] [CrossRef]
- De Moraes, S.L.; Lima, J.R.B.D.; Neto, J.B.F.; Fredericci, C.; Saccoccio, E.M. Binding Mechanism in Green Iron Ore Pellets with an Organic Binder. Miner. Process. Extr. Metall. Rev. 2020, 41, 247–254. [Google Scholar] [CrossRef]
- Qiu, G.; Jiang, T.; Fa, K.; Zhu, D.; Wang, D. Interfacial characterizations of iron ore concentrates affected by binders. Powder Technol. 2004, 139, 1–6. [Google Scholar] [CrossRef]
- Zhou, Y.; Kawatra, S.K. Humic Substance-based Binder in Iron Ore Pelletization: A Review. Miner. Process. Extr. Metall. Rev. 2017, 38, 321–337. [Google Scholar] [CrossRef]
- Copeland, C.R.; Claremboux, V.; Kawatra, S.K. A Comparison of Pellet Quality from Straight-grate and Grate-kiln Furnaces. Miner. Process. Extr. Metall. Rev. 2019, 40, 218–223. [Google Scholar] [CrossRef]
- Athayde, M.; Cotta, L.C.V.S.; Bagatini, M.C. Case Study of Thermal Profile Design for Traveling Grate Pellet Furnace. Miner. Process. Extr. Metall. Rev. 2019, 40, 24–34. [Google Scholar] [CrossRef]
- Chen, W.; Dong, Z.; Jiao, Y.; Liu, L.; Wang, X. Preparation, Sintering Behavior and Consolidation Mechanism of Vanadium-Titanium Magnetite Pellets. Crystals 2021, 11, 188. [Google Scholar] [CrossRef]
- Han, Y.; Kim, S.; Go, B.; Lee, S.; Park, S.; Jeon, H.S. Optimized magnetic separation for efficient recovery of V and Ti enriched concentrates from vanadium-titanium magnetite ore: Effect of grinding and magnetic intensity. Powder Technol. 2021, 391, 282–291. [Google Scholar] [CrossRef]
- Eisele, T.C.; Kawatra, S.K. A review of binders in iron ore pelletization. Miner. Process. Extr. Metall. Rev. 2003, 24, 1–90. [Google Scholar] [CrossRef]
- Zhang, Y.; Lu, M.; Zhou, Y.; Su, Z.; Liu, B.; Li, G.; Jiang, T. Interfacial Interaction between Humic Acid and Vanadium, Titanium-Bearing Magnetite (VTM) Particles. Miner. Process. Extr. Metall. Rev. 2020, 41, 75–84. [Google Scholar] [CrossRef]
- Wang, S.; Guo, Y.; Zheng, F.; Chen, F.; Yang, L. Improvement of roasting and metallurgical properties of fluorine-bearing iron concentrate pellets. Powder Technol. 2020, 376, 126–135. [Google Scholar] [CrossRef]
- Halt, J.A.; Nitz, M.C.; Kawatra, S.K.; Dubé, M. Iron Ore Pellet Dustiness Part I: Factors Affecting Dust Generation. Miner. Process. Extr. Metall. Rev. 2015, 36, 258–266. [Google Scholar] [CrossRef]
- Geerdes, M.; Toxopeus, H.; van der Vliet, C. Ch. 3: The Ore Burden: Sinter, Pellets, Lump ore. In Modern Blast Furnace Ironmaking: An Introduction, 2nd ed.; IOS Press: Amsterdam, The Netherlands, 2009; pp. 19–35. [Google Scholar]
Component | TFe | FeO | SiO2 | Al2O3 | CaO | MgO | TiO2 | V2O5 | K2O | Na2O |
---|---|---|---|---|---|---|---|---|---|---|
VTM | 55.45 | 32.36 | 4.39 | 3.05 | 0.75 | 3.16 | 11.17 | 0.61 | 0.02 | 0.11 |
Bentonite | - | - | 59.66 | 12.43 | 4.60 | 3.40 | - | - | 0.94 | 2.68 |
Component | Mad | Aad | Vad | FCad | Ash Chemical Composition/wt% | |||||
---|---|---|---|---|---|---|---|---|---|---|
TFe | SiO2 | Al2O3 | CaO | K2O | Na2O | |||||
Content | 15.62 | 39.51 | 18.21 | 26.66 | 2.52 | 56.90 | 24.69 | 0.58 | 2.48 | 6.80 |
Binder | Preheating | Firing | Qualities of Fired Pellets | |||||
---|---|---|---|---|---|---|---|---|
T/°C | Time/min | T/°C | Time/min | Compressive Strength/(N/P) | Tumble Index (+6.3 mm)/% | Abrasion Index (−0.5 mm)/% | Crack Ratio/% | |
HA binder | 950 | 15 | 1733 | 88.9 | 8.9 | 15 | ||
950 | 18 | 1280 | 10 | 1978 | 91.0 | 6.8 | 33 | |
1000 | 18 | 2153 | 93.4 | 4.5 | 18 | |||
950 | 18 | 1300 | 10 | 2344 | 94.2 | 3.6 | 24 | |
1280 | 12 | 2067 | 91.3 | 6.9 | 16 | |||
Bentonite | 950 | 15 | 1280 | 10 | 2279 | 94.1 | 4.2 | 10 |
Standard * | - | - | - | - | ≥2300 | ≥90.0 | ≤6.0 | - |
Binder | TFe | FeO | SiO2 | Al2O3 | CaO | MgO | TiO2 | V2O5 | K2O | Na2O | P | S |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Bentonite | 53.61 | 2.09 | 4.61 | 3.09 | 0.75 | 3.03 | 11.05 | 0.59 | 0.02 | 0.16 | 0.01 | 0.01 |
HA binder | 54.58 | 1.57 | 4.02 | 2.91 | 0.66 | 2.97 | 11.14 | 0.60 | 0.02 | 0.19 | 0.01 | 0.01 |
Binder | RI/% | RDI+3.15mm/% | RSI/% | T10/°C | T40/°C | ΔT1/°C | Td/°C | ΔT2/°C |
---|---|---|---|---|---|---|---|---|
Bentonite | 59.59 | 97.98 | 10.56 | 1051 | 1182 | 131 | 1299 | 248 |
HA binder | 58.40 | 98.71 | 9.35 | 1075 | 1184 | 109 | 1285 | 210 |
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Yi, Y.; Li, G.; Cao, P.; Zhang, X.; Zhang, Y.; Zhang, J.; Huang, J. Effect of Humic Acid Binder on Oxidation Roasting of Vanadium–Titanium Magnetite Pellets via Straight-Grate Process. Crystals 2021, 11, 1283. https://doi.org/10.3390/cryst11111283
Yi Y, Li G, Cao P, Zhang X, Zhang Y, Zhang J, Huang J. Effect of Humic Acid Binder on Oxidation Roasting of Vanadium–Titanium Magnetite Pellets via Straight-Grate Process. Crystals. 2021; 11(11):1283. https://doi.org/10.3390/cryst11111283
Chicago/Turabian StyleYi, Yihui, Guanghui Li, Pengxu Cao, Xin Zhang, Yongkang Zhang, Jin Zhang, and Jiahao Huang. 2021. "Effect of Humic Acid Binder on Oxidation Roasting of Vanadium–Titanium Magnetite Pellets via Straight-Grate Process" Crystals 11, no. 11: 1283. https://doi.org/10.3390/cryst11111283