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Effect of frictional grinding on ore characteristics and selectivity of magnetic separation.
- Source :
-
Minerals Engineering . Jun2018, Vol. 122, p251-257. 7p. - Publication Year :
- 2018
-
Abstract
- Frictional grinding was evaluated to improve the selectivity of two magnetite samples A and B in the magnetic separation process. Sample A containing 64.42% Fe was a magnetite concentrate upgraded from a low grade magnetite Ore, Sample B, containing 46.63% Fe, through an upgrading process involving 1-stage ball milling and 3-stage wet magnetic separation in a beneficiation plant. Frictional grinding was found extremely efficient in dispersing the grains in the agglomerates and on the surface, consequently improving the selectivity of the sample. A magnetite concentrate containing 66.22% Fe was produced from Sample A at an iron recovery of 96.86% by introducing a simple dry frictional grinding step prior to the magnetic separation process. The results have demonstrated that Sample A can be further upgraded even though it was processed through 3-stage magnetic separation. Given its beneficial effects, frictional grinding was further adopted in a multiple-stage flowsheet to upgrade both Samples A and B. A magnetite concentrate containing 68.75% Fe was produced from Sample A at an iron recovery of 97.23% through the multiple-stage wet frictional grinding-magnetic separation flowsheet. When the same flowsheet was applied to process Sample B, a concentrate of 69.97% Fe, higher than Sample A obtained by ball milling, was produced at an iron recovery of 86.44%. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 08926875
- Volume :
- 122
- Database :
- Academic Search Index
- Journal :
- Minerals Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 129701180
- Full Text :
- https://doi.org/10.1016/j.mineng.2018.04.015