Study on the Basic Characteristics of Iron Ore Powder with Different Particle Sizes
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials Properties
2.2. Experiment Method
3. Results
3.1. Assimilation
3.2. Liquid Phase Fluidity
3.3. Binding Phase Strength
4. Conclusions
- (1)
- Through the experimental research on the basic characteristics of seven kinds of iron ore powder, the content of MgO, SiO2, Al2O3, and other substances in the iron ore powder and its own microscopic morphology affected the basic characteristics of the iron ore powder.
- (2)
- The basic characteristics experiment based on the original particle size of ore powder was mainly divided into three particle sizes for comparative analysis. As for the assimilation temperature, with the gradual increase of particle size, the assimilation temperature showed a decreasing trend as a whole. However, due to the large particle size in the process of sample preparation and the positional relationship between the particles, the morphologies of the samples could not be generally unified, so there was a force majeure factor in the assimilation temperature measurement process. Therefore, the assimilation temperature alone cannot determine the performance of the mineral powder.
- (3)
- Next, the system temperature was set to 1350 °C in the fluidity index determination. In order to show the flow characteristics of each mineral powder more intuitively, with the increase of particle size, the flow index from large to small, it was also observed that the fluidity indices of iron ore powders B, F, and G showed a polarized arrangement, while iron ore powder A showed the smallest fluidity index under each particle size of iron ore powder, similar to iron ore powder E. Therefore, the proportions of these ore powders should be appropriately reduced in the sintering to ensure that the final index of the sintered ore conforms to the actual production on site.
- (4)
- The final bonding phase strength was the best feature of the data visualization of each mineral powder. The strength of each ore powder varied significantly, and the binder phase strength of each grade of iron ore powders C and F was the best among all the ore powders. The SiO2 content of C was lower than that of F. If the low-silicon scheme is used for ore blending, the quality of sinter can be guaranteed by increasing the addition ratio of C iron ore powder. Iron ore powder B and iron ore powder E had the worst strength among all the ore powders. Such a binding phase strength cannot guarantee the quality of sintered ore, and it is recommended to reduce the amount used in the subsequent production. It needs to be used with iron ore powder with better basic properties.
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
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Sample | TFe | SiO2 | CaO | MgO | Al2O3 | P | S | LOI |
---|---|---|---|---|---|---|---|---|
A | 58.19 | 5.55 | 0.06 | 0.13 | 3.95 | 0.135 | 0.039 | 7.2 |
B | 58.64 | 5.64 | 0.03 | 0.09 | 2.70 | 0.079 | 0.034 | 6.8 |
C | 62.95 | 5.04 | 0.02 | 0.08 | 1.45 | 0.070 | 0.016 | 4.5 |
D | 57.39 | 5.04 | 0.02 | 0.08 | 6.45 | 0.060 | 0.073 | 6.0 |
E | 60.50 | 4.66 | 0 | 0.09 | 2.52 | 0.079 | 0.031 | 5.5 |
F | 56.79 | 6.33 | 0.04 | 0.10 | 3.34 | 0.080 | 0.030 | 9.0 |
G | 59.20 | 5.72 | 0.05 | 0.12 | 3.26 | 0.046 | 0.038 | 5.5 |
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Li, Z.; Li, Y.; Duan, Y.; Yang, A.; Xu, Z.; Zhi, J. Study on the Basic Characteristics of Iron Ore Powder with Different Particle Sizes. Minerals 2022, 12, 973. https://doi.org/10.3390/min12080973
Li Z, Li Y, Duan Y, Yang A, Xu Z, Zhi J. Study on the Basic Characteristics of Iron Ore Powder with Different Particle Sizes. Minerals. 2022; 12(8):973. https://doi.org/10.3390/min12080973
Chicago/Turabian StyleLi, Zezheng, Yifan Li, Yuanshuai Duan, Aimin Yang, Zhenghan Xu, and Jianming Zhi. 2022. "Study on the Basic Characteristics of Iron Ore Powder with Different Particle Sizes" Minerals 12, no. 8: 973. https://doi.org/10.3390/min12080973