Microwave and Ultrasonic Pretreatment-Assisted Upgradation of Iron Ore of Karnataka Region from India

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Authors

  • Mohan Poojari
     Department of Mechanical Engineering, NITTE (Deemed to be University), NMAM Institute of Technology, NITTE, Karkala - 574110 ,IN
  • Harsha Vardhan
     Department of Mining Engineering, National Institute of Technology, Surathkal, Mangalore - 575025, Karnataka ,IN
  • Harshitha Madhusoodan Jathanna
     Department of Biotechnology Engineering, NITTE (Deemed to be University), NMAM Institute of Technology, NITTE, Karkala - 574110, Karnataka ,IN
  • Dhananjaya G. Reddy
     M/s. R. Praveen Chandra, E Ramamurthy Group, Bangalore - 560011, Karnataka ,IN

DOI:

https://doi.org/10.18311/jmmf/2023/33576

Keywords:

Grinding Energy, Iron Ore, Microwave, Ultrasonication, Work Index

Abstract

Essentially, size reduction is the very first and vital segment of mineral processing. Microwaves (MW) for comminution have piqued the interest of researchers and industrialists in recent years. The use of microwaves in processing industries is solely due to some of the unique benefits they provide. Because MW heating does not rely on temperature gradients but instead generates heat as a result of molecules interacting with microwaves and the resulting internal friction, this treatment can result in rapid and volumetric heating. Because of these factors, this treatment can significantly reduce process times while also improving product quality. The current study demonstrated the formation of intergranular fractures and their influence on comminution energy after MW treatment of Indian iron ore. Scanning Electron Microscopy (SEM) analysis confirmed that pretreatment with MW made the ore more brittle, making it more amenable to grinding, and a decrease in grinding energy of the pretreated ore was observed in comparison to the untreated sample. The X-Ray Diffraction (XRD) results demonstrated an increase in ore crystallinity following MW exposure, substantiating the pretreated sample's lower grinding energy consumption. Additionally, ultrasonication of MW pretreated ore was attempted to determine whether the combined treatment method could improve the ore quality, and the combination techniques were successful in increasing the iron content by 41% while decreasing the alumina and silica contents by 59% and 38%, respectively. The findings support the use of both MW irradiation and ultrasonication as promising methods of improving mineral quality.

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Author Biographies

Harsha Vardhan, Department of Mining Engineering, National Institute of Technology, Surathkal, Mangalore - 575025, Karnataka

 

 

Harshitha Madhusoodan Jathanna, Department of Biotechnology Engineering, NITTE (Deemed to be University), NMAM Institute of Technology, NITTE, Karkala - 574110, Karnataka

 

 

Dhananjaya G. Reddy, M/s. R. Praveen Chandra, E Ramamurthy Group, Bangalore - 560011, Karnataka

 

 

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Published

2023-11-15

How to Cite

Poojari, M., Vardhan, H., Jathanna, H. M., & Reddy, D. G. (2023). Microwave and Ultrasonic Pretreatment-Assisted Upgradation of Iron Ore of Karnataka Region from India. Journal of Mines, Metals and Fuels, 71(10), 1359–1373. https://doi.org/10.18311/jmmf/2023/33576

Issue

Volume 71, Issue 10, October 2023

Section

Articles

License

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

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Received 2023-04-22
Accepted 2023-11-15
Published 2023-11-15

 

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