Skip to main content Accessibility help
×
Home

Selective Fragmentation of Oolitic Iron Ores by Microwave Pretreatment

  • Ernesto F. Campos-Toro (a1), Shaoxian Song (a1) and Alejandro López-Valdivieso (a1)

Abstract

There are plentiful of oolitic iron ore resources on the earth, which cannot be currently exploited because of great difficulties for beneficiating the ore. In this work, the selective fragmentation of a Chinese oolitic iron ore (which fragments ore particles along the interfaces of iron and gangue minerals) through microwave was studied in order to liberate the iron minerals at a coarse particle size and thus to effectively concentrate the iron minerals from the ore. The experimental results have shown that a large amount of fractures on the oolitic iron ore were formed along iron and gangue mineral interfaces after being treated by microwave radiation at an appropriate frequency and potential. Following a microwave treatment, the oolitic iron ore was ground by using a ball vertimill. It was indicated that the pretreatment increased the liberation of the iron and gangue minerals at the same particle size, about 10-20% and 10-30% respectively.

Copyright

References

Hide All
1. Fuerstenau, D.W., Chander, S., Abouzeid, A.M., (1979), Beneficiation of Mineral Fines: Problems and Research Needs, Somasundaran, P. and Arbiter, N. (Ed.), National Science Foundation, 359
2. Song, S., Lu, S., Lopez-Valdivieso, A., (2002), Magnetic separation of hematite and limonite fines as hydrophobic flocs from iron ore , Minerals Engineering, 15, 415422.
3. Fitzgibbon, K., Veasey, T., (1990), Thermally assisted liberation—a review , Minerals Engineering 3, 181185.
4. Jones, D.A., Kingman, S.W., Whittles, D.N. Lowndes, I.S., (2005), Understanding microwave assisted breakage , Minerals Engineering 18, 659669.
5. Wang, G., Radziszewski, P., Ouellet, J., (2008), Particle modeling simulation of thermal effects on ore breakage , Computational Materials Science 43, 892901.
6. Rasband, W.S., (1997-2009), ImageJ, U.S. National Institutes of Health, Bethesda, Maryland, USA, http://rsb.info.nih.gov/ij/.
7. Whittles, D.N., Kingman, S.W., Reddish, D.J., (2003), Application of numerical modeling for prediction of the influence of power density on microwave-assisted breakage , International Journal of Mineral Processing 68, 7191.
8. Salsman, J.B., Williamson, R.L., Tolley, W.K., Rice, D.E., (1996), Short pulse microwave treatment of disseminated ores , Minerals Engineering 9, 1 4354.
9. Ali, A.Y., Bradshaw, S.M., (2009), Quantifying damage around grain boundaries in microwave treated ores , Chemical Engineering and Processing 48, 15661573.

Related content

Powered by UNSILO

Selective Fragmentation of Oolitic Iron Ores by Microwave Pretreatment

  • Ernesto F. Campos-Toro (a1), Shaoxian Song (a1) and Alejandro López-Valdivieso (a1)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.