Experimental Compressive Strength and Microstructure Analysis of Magnesium Fluxed Pellets

Zeyu Chen; Changqing Hu; Xuefeng Shi; Qichen Hu; Lianji Liu; Hong Xiao

doi:doi:10.11648/j.ijmpem.20220701.13

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Experimental Compressive Strength and Microstructure Analysis of Magnesium Fluxed Pellets

Zeyu Chen, Changqing Hu, Xuefeng Shi, Qichen Hu, Lianji Liu, Hong Xiao

Published in International Journal of Mineral Processing and Extractive Metallurgy (Volume 7, Issue 1)

Received: 12 January 2022 Accepted: 26 January 2022 Published: 9 February 2022

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Abstract

In this paper, Zhong Guan iron ore is used as raw material. By adjusting the content of lime, raw magnesium powder and bentonite, the effect law of different SiO₂, MgO content and alkalinity on the compressive strength of pellet ore under low silicon conditions was studied, And the pellet strength change law was systematically analyzed from the microscopic morphology and structure perspective. The results of the study show that increasing the roasting temperature and alkalinity can effectively improve the compressive strength of pellets. At low SiO₂ content, the pellet ore is mainly cemented by hematite continuous crystals and the change in strength is not obvious. With the increase of alkalinity, the amount of liquid phase of low silicon flux pellets increases during roasting, and the liquid phase of calcium ferrite system with strength higher than hematite eutectic appears, which improves the pellet strength; With the increase of MgO mass fraction, magnesium ferrite increases, which not only inhibits the formation of liquid phase in pellets, but also inhibits the oxidation of magnetite. Because the strength of magnesium ferrite system is greater than that of magnetite and hematite, the pellet strength increases, but too much magnesium ferrite will also affect the liquid phase bonding inside the pellet, lead to structural deterioration and reduce the pellet strength. Therefore, the compressive strength of pellet increases first and then decreases. The above study provides theoretical guidance and reference for the investigation of low-silica magnesia fluxed pellets.

Published in	International Journal of Mineral Processing and Extractive Metallurgy (Volume 7, Issue 1)
DOI	10.11648/j.ijmpem.20220701.13
Page(s)	14-25
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2022. Published by Science Publishing Group

Keywords

Zhong Guan Iron Ore Powder, Fluxed Pellets, SiO₂, Alkalinity, MgO, Compressive Strength, Roasting Experiment

References

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[2]	Bo Shengyue, Hu Changqing, Shi Xuefeng, et al. Han, W. G. Development and Prospect of MaGnesium Flux Pellets [J]. Journal of North China University of Technology (Natural Science Edition), 2021, 43 (03): 40-48.
[3]	RAJ KUMAR DISHWAR, ARUP KUMAR MANDAL. SINHA. Studies on Highly Fluxed Iron Ore Pellets Hardened at 1100°C to 1200°C [J]. Metallurgical and Materials Transactions B, 2019, 50 (2): 375-435.
[4]	Wang, Shuzhao. Numerical Simulation of Temperature Field and Flow Field Distribution in Rotary Kiln during Flux Pellet Production [D]. North China University of Science and Technology, 2019.
[5]	Wang XD, Jin YL. Steategy analysis and testing study of high ratio of pellet utilized in blast furnace [J]. Iron and Steel, 2021, 56 (05): 7-16.
[6]	Wang, H. F., Pei, Y. D., Zhang, C. X., et al. Green development of sintering/pellet procedure in China iron and steel industry [J]. Iron and Steel, 2016, 51 (01): 1-7.
[7]	Hu Qichen. Problems and countermeasures for the tradition blast furnace ironmaking process [J]. Hebei Metallurgy, 2017 (12): 28-32.
[8]	Xing Y, Zhang W B, Su W, et al. Research of ultra-low emission technologies of the iron and steel industry in China [J]. Journal of Engineering Science, 2021, 43 (01): 1-9.
[9]	Huang D, Chen LY, Zhang LF, et al. Boost the upgrade of energy conservation and environmental protection technology management and promote the green transformation of iron and steel industry [J]. Iron and Steel, 2015, 50 (12): 1-10.
[10]	Xu Manxing, Zhang Yulan. Analysis of pellet technology and production of China in 21st century [J]. Sintered pellets, 2017, 42 (02): 25-30+37.
[11]	Yu Limei, Zhang Ruopeng, Ren Cuiying. Research on establishing standards system of low-carbon development for iron and steel industry [J]. China Metallurgy, 2021, 31 (09): 135-142.
[12]	Zhang Shuhui, Wang Baoyong, Lan Chenchen, et al. Prospects and present status of pellets chemical composition control [J]. Iron and Steel, 2020, 55 (08): 19-26.
[13]	Wang Shuchao, Shi Xuefeng, Zhang Qiaorong, et al. Roasting and Induration Mechanism in Magnesia Pellet [J]. Steel vanadium and titanium, 2018, 39 (05): 79-85.
[14]	Wang Xiaolei, Shi Xuefeng, Hu Changqing, et al. Experimental study on the roasting of High Silica Magnesium Flux Pellet [J]. Mineral Comprehensive Utilization, 2020, (04): 87-92.
[15]	Liu Z, Li J, Yang A, et al. Influence mechanism of basicity on strength of magnesium fluxed pellets [J]. Iron and Steel, 2021, 56 (01): 28-36.
[16]	Hu Changqing, Wang Xiaolei, Shi Xuefeng, et al. Effect of MgO and basicity on liquid phase formation of FeO_x-SiO₂-CaO-MgO-Al₂O₃ system [J]. Iron and Steel, 2020, 55 (04): 27-33.
[17]	Wang Zhixing, Shi Xuefeng, Hu Changqing, et al. Effect of MgO and Al2O3 on the Formation of Calcium Ferriite [J]. Steel Vanadium and Titanium, 2018, 39 (06): 116-121.
[18]	Lv ZY, Chen G, Ma L, et al. Experimental study of pellet ore with different alkalinity and containing magnesium oxide [J]. Baogang Science and Technology, 2003 (04): 1-3+11.

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APA Style

Zeyu Chen, Changqing Hu, Xuefeng Shi, Qichen Hu, Lianji Liu, et al. (2022). Experimental Compressive Strength and Microstructure Analysis of Magnesium Fluxed Pellets. International Journal of Mineral Processing and Extractive Metallurgy, 7(1), 14-25. https://doi.org/10.11648/j.ijmpem.20220701.13

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ACS Style

Zeyu Chen; Changqing Hu; Xuefeng Shi; Qichen Hu; Lianji Liu, et al. Experimental Compressive Strength and Microstructure Analysis of Magnesium Fluxed Pellets. Int. J. Miner. Process. Extr. Metall. 2022, 7(1), 14-25. doi: 10.11648/j.ijmpem.20220701.13

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AMA Style

Zeyu Chen, Changqing Hu, Xuefeng Shi, Qichen Hu, Lianji Liu, et al. Experimental Compressive Strength and Microstructure Analysis of Magnesium Fluxed Pellets. Int J Miner Process Extr Metall. 2022;7(1):14-25. doi: 10.11648/j.ijmpem.20220701.13

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@article{10.11648/j.ijmpem.20220701.13,
  author = {Zeyu Chen and Changqing Hu and Xuefeng Shi and Qichen Hu and Lianji Liu and Hong Xiao},
  title = {Experimental Compressive Strength and Microstructure Analysis of Magnesium Fluxed Pellets},
  journal = {International Journal of Mineral Processing and Extractive Metallurgy},
  volume = {7},
  number = {1},
  pages = {14-25},
  doi = {10.11648/j.ijmpem.20220701.13},
  url = {https://doi.org/10.11648/j.ijmpem.20220701.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmpem.20220701.13},
  abstract = {In this paper, Zhong Guan iron ore is used as raw material. By adjusting the content of lime, raw magnesium powder and bentonite, the effect law of different SiO2, MgO content and alkalinity on the compressive strength of pellet ore under low silicon conditions was studied, And the pellet strength change law was systematically analyzed from the microscopic morphology and structure perspective. The results of the study show that increasing the roasting temperature and alkalinity can effectively improve the compressive strength of pellets. At low SiO2 content, the pellet ore is mainly cemented by hematite continuous crystals and the change in strength is not obvious. With the increase of alkalinity, the amount of liquid phase of low silicon flux pellets increases during roasting, and the liquid phase of calcium ferrite system with strength higher than hematite eutectic appears, which improves the pellet strength; With the increase of MgO mass fraction, magnesium ferrite increases, which not only inhibits the formation of liquid phase in pellets, but also inhibits the oxidation of magnetite. Because the strength of magnesium ferrite system is greater than that of magnetite and hematite, the pellet strength increases, but too much magnesium ferrite will also affect the liquid phase bonding inside the pellet, lead to structural deterioration and reduce the pellet strength. Therefore, the compressive strength of pellet increases first and then decreases. The above study provides theoretical guidance and reference for the investigation of low-silica magnesia fluxed pellets.},
 year = {2022}
}

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TY  - JOUR
T1  - Experimental Compressive Strength and Microstructure Analysis of Magnesium Fluxed Pellets
AU  - Zeyu Chen
AU  - Changqing Hu
AU  - Xuefeng Shi
AU  - Qichen Hu
AU  - Lianji Liu
AU  - Hong Xiao
Y1  - 2022/02/09
PY  - 2022
N1  - https://doi.org/10.11648/j.ijmpem.20220701.13
DO  - 10.11648/j.ijmpem.20220701.13
T2  - International Journal of Mineral Processing and Extractive Metallurgy
JF  - International Journal of Mineral Processing and Extractive Metallurgy
JO  - International Journal of Mineral Processing and Extractive Metallurgy
SP  - 14
EP  - 25
PB  - Science Publishing Group
SN  - 2575-1859
UR  - https://doi.org/10.11648/j.ijmpem.20220701.13
AB  - In this paper, Zhong Guan iron ore is used as raw material. By adjusting the content of lime, raw magnesium powder and bentonite, the effect law of different SiO2, MgO content and alkalinity on the compressive strength of pellet ore under low silicon conditions was studied, And the pellet strength change law was systematically analyzed from the microscopic morphology and structure perspective. The results of the study show that increasing the roasting temperature and alkalinity can effectively improve the compressive strength of pellets. At low SiO2 content, the pellet ore is mainly cemented by hematite continuous crystals and the change in strength is not obvious. With the increase of alkalinity, the amount of liquid phase of low silicon flux pellets increases during roasting, and the liquid phase of calcium ferrite system with strength higher than hematite eutectic appears, which improves the pellet strength; With the increase of MgO mass fraction, magnesium ferrite increases, which not only inhibits the formation of liquid phase in pellets, but also inhibits the oxidation of magnetite. Because the strength of magnesium ferrite system is greater than that of magnetite and hematite, the pellet strength increases, but too much magnesium ferrite will also affect the liquid phase bonding inside the pellet, lead to structural deterioration and reduce the pellet strength. Therefore, the compressive strength of pellet increases first and then decreases. The above study provides theoretical guidance and reference for the investigation of low-silica magnesia fluxed pellets.
VL  - 7
IS  - 1
ER  -

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Author Information

Zeyu Chen

School of Metallurgy and Energy, North China University of Technology, Tangshan, China
Changqing Hu

School of Metallurgy and Energy, North China University of Technology, Tangshan, China
Xuefeng Shi

School of Metallurgy and Energy, North China University of Technology, Tangshan, China
Qichen Hu

Hbis Group CO., LTD, Shijiazhuang, China
Lianji Liu

Hbis Group Tangsteel Company, Tangshan, China
Hong Xiao

Hbis Group Tangsteel Company, Tangshan, China

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Plain Text BibTeX RIS

APA Style

Zeyu Chen, Changqing Hu, Xuefeng Shi, Qichen Hu, Lianji Liu, et al. (2022). Experimental Compressive Strength and Microstructure Analysis of Magnesium Fluxed Pellets. International Journal of Mineral Processing and Extractive Metallurgy, 7(1), 14-25. https://doi.org/10.11648/j.ijmpem.20220701.13

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ACS Style

Zeyu Chen; Changqing Hu; Xuefeng Shi; Qichen Hu; Lianji Liu, et al. Experimental Compressive Strength and Microstructure Analysis of Magnesium Fluxed Pellets. Int. J. Miner. Process. Extr. Metall. 2022, 7(1), 14-25. doi: 10.11648/j.ijmpem.20220701.13

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AMA Style

Zeyu Chen, Changqing Hu, Xuefeng Shi, Qichen Hu, Lianji Liu, et al. Experimental Compressive Strength and Microstructure Analysis of Magnesium Fluxed Pellets. Int J Miner Process Extr Metall. 2022;7(1):14-25. doi: 10.11648/j.ijmpem.20220701.13

Copy | Download

@article{10.11648/j.ijmpem.20220701.13,
  author = {Zeyu Chen and Changqing Hu and Xuefeng Shi and Qichen Hu and Lianji Liu and Hong Xiao},
  title = {Experimental Compressive Strength and Microstructure Analysis of Magnesium Fluxed Pellets},
  journal = {International Journal of Mineral Processing and Extractive Metallurgy},
  volume = {7},
  number = {1},
  pages = {14-25},
  doi = {10.11648/j.ijmpem.20220701.13},
  url = {https://doi.org/10.11648/j.ijmpem.20220701.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmpem.20220701.13},
  abstract = {In this paper, Zhong Guan iron ore is used as raw material. By adjusting the content of lime, raw magnesium powder and bentonite, the effect law of different SiO2, MgO content and alkalinity on the compressive strength of pellet ore under low silicon conditions was studied, And the pellet strength change law was systematically analyzed from the microscopic morphology and structure perspective. The results of the study show that increasing the roasting temperature and alkalinity can effectively improve the compressive strength of pellets. At low SiO2 content, the pellet ore is mainly cemented by hematite continuous crystals and the change in strength is not obvious. With the increase of alkalinity, the amount of liquid phase of low silicon flux pellets increases during roasting, and the liquid phase of calcium ferrite system with strength higher than hematite eutectic appears, which improves the pellet strength; With the increase of MgO mass fraction, magnesium ferrite increases, which not only inhibits the formation of liquid phase in pellets, but also inhibits the oxidation of magnetite. Because the strength of magnesium ferrite system is greater than that of magnetite and hematite, the pellet strength increases, but too much magnesium ferrite will also affect the liquid phase bonding inside the pellet, lead to structural deterioration and reduce the pellet strength. Therefore, the compressive strength of pellet increases first and then decreases. The above study provides theoretical guidance and reference for the investigation of low-silica magnesia fluxed pellets.},
 year = {2022}
}

Copy | Download

TY  - JOUR
T1  - Experimental Compressive Strength and Microstructure Analysis of Magnesium Fluxed Pellets
AU  - Zeyu Chen
AU  - Changqing Hu
AU  - Xuefeng Shi
AU  - Qichen Hu
AU  - Lianji Liu
AU  - Hong Xiao
Y1  - 2022/02/09
PY  - 2022
N1  - https://doi.org/10.11648/j.ijmpem.20220701.13
DO  - 10.11648/j.ijmpem.20220701.13
T2  - International Journal of Mineral Processing and Extractive Metallurgy
JF  - International Journal of Mineral Processing and Extractive Metallurgy
JO  - International Journal of Mineral Processing and Extractive Metallurgy
SP  - 14
EP  - 25
PB  - Science Publishing Group
SN  - 2575-1859
UR  - https://doi.org/10.11648/j.ijmpem.20220701.13
AB  - In this paper, Zhong Guan iron ore is used as raw material. By adjusting the content of lime, raw magnesium powder and bentonite, the effect law of different SiO2, MgO content and alkalinity on the compressive strength of pellet ore under low silicon conditions was studied, And the pellet strength change law was systematically analyzed from the microscopic morphology and structure perspective. The results of the study show that increasing the roasting temperature and alkalinity can effectively improve the compressive strength of pellets. At low SiO2 content, the pellet ore is mainly cemented by hematite continuous crystals and the change in strength is not obvious. With the increase of alkalinity, the amount of liquid phase of low silicon flux pellets increases during roasting, and the liquid phase of calcium ferrite system with strength higher than hematite eutectic appears, which improves the pellet strength; With the increase of MgO mass fraction, magnesium ferrite increases, which not only inhibits the formation of liquid phase in pellets, but also inhibits the oxidation of magnetite. Because the strength of magnesium ferrite system is greater than that of magnetite and hematite, the pellet strength increases, but too much magnesium ferrite will also affect the liquid phase bonding inside the pellet, lead to structural deterioration and reduce the pellet strength. Therefore, the compressive strength of pellet increases first and then decreases. The above study provides theoretical guidance and reference for the investigation of low-silica magnesia fluxed pellets.
VL  - 7
IS  - 1
ER  -

Copy | Download