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Composite Micropelletization of Slime for Iron Grade and Recovery Maximization to Generate Pellet Feed Materials

  • Ravi Kant SagarEmail author
  • Nishant Chavan
  • Vikash Kumar
  • K. S. Sridhar
  • Rameshwar Sah
Technical Paper
  • 35 Downloads

Abstract

The present research work deals with the upgradation of iron ore slime by maximizing its iron grade and recovery so that it can be used in downstream iron making processes. Slime contains significant amount of iron value and is still being dumped as waste which also requires large area for dumping. Slime (45–48 wt% Fetotal) after converting into dry powder was mixed with desired amount of reductant (NCC), and the mixture was converted into composite micropellets (+ 1 to − 6 mm) by using disc pelletizer. Produced composite micropellets were subjected to reduction at desired reduction conditions. Temperature, NCC dosage and time were the prime parameters whose effect on iron grade and recovery was investigated. Wet magnetic separation tests were performed on reduced samples to upgrade the iron content. Maximum value of iron grade and recovery was achieved at 900 °C with 11% of NCC for 60 min. After magnetic separation, iron content and recovery in the magnetic concentrate were 57.27% and 60%, respectively. This route of reduction for steel plant generated slime may be a helping hand in the usage of slime to prepare magnetic concentrate-based pellet feed materials.

Keywords

Slime NCC Disc pelletizer Composite micropellets Carbo-thermic reduction Iron grade and recovery 

Notes

Acknowledgements

We are thankful to Dr. Rameshwar Sah, Deputy General Manager, R&D, JSW Steel Limited, Karnataka, for his guidance and support throughout the investigation.

References

  1. 1.
    Sarkar S, Hydrometallurgy105 (2011) 364.CrossRefGoogle Scholar
  2. 2.
    Roy S, Open Miner Process J2 (2009) 17.CrossRefGoogle Scholar
  3. 3.
    Srivastava M P, Pan S K, Prasad N, and Mishra B K, Int J Miner Process61 (2001) 93.CrossRefGoogle Scholar
  4. 4.
    Jiang T, Yang L, Li G, Luo J, Zeng J, Peng Z, and Liu M, Can J Metall Mater Sci55 (2016) 345.Google Scholar
  5. 5.
    Li C, Suna H, Baic J, and Li L, J Hazard Mater174 (2010) 71.CrossRefGoogle Scholar
  6. 6.
    Chun T, Long H, and Li J, Sep Sci Technol50 (2015) 760.CrossRefGoogle Scholar
  7. 7.
    Uwadiale G G O O, Miner Process Extr Metall Rev11 (1992) 1.CrossRefGoogle Scholar
  8. 8.
    Fard N A, Shalchian H, Abbasi A R, Khaki J V, and Babakhani A, Iran J Mater Sci Eng13 (2016) 60.Google Scholar
  9. 9.
    Ajeel A W A A, and Abdullahm S N, Iraqi Bull Geol Min5 (2009) 119.Google Scholar
  10. 10.
    Farisa N, Tardio J, Ram R, Bhargava S, and Pownceby M I, Miner Eng114 (2017) 37.CrossRefGoogle Scholar
  11. 11.
    Bai S J, Li C L, Fu X Y, Lv C, and Wen S M, Clean Technol Environ Policy20 (2018) 1.CrossRefGoogle Scholar
  12. 12.
    Dutta S K, and Sah R, Encyclopedia of Iron, Steel, and Their Alloys, CRC Press, Boca Raton (2016) p 1082.CrossRefGoogle Scholar

Copyright information

© The Indian Institute of Metals - IIM 2019

Authors and Affiliations

  1. 1.JSW Steel LimitedBellaryIndia
  2. 2.College of Engineering PunePuneIndia

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