Effect of the Morphological Types in Grinding of Iron-Ore Products |
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| Authors: | L. M. Graça L. E. Lagoeiro R. M. F. Lima P. F. Barbosa M. M. Machado |
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| Affiliation: | 1. School of Mines, Federal University of Ouro Preto, Campus Morro do Cruzeiro, Ouro Preto, MG, Brazilleonardomgraca@gmail.com;3. School of Mines, Federal University of Ouro Preto, Campus Morro do Cruzeiro, Ouro Preto, MG, Brazil;4. Center of Microscopy, Federal University of Minas Gerais, MG, Brazil;5. Vale S.A., Jardim Camburi, Vitória, ES, Brazil |
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| Abstract: | The iron-ore products are characterized in order to investigate the effect of the mineralogical features on the grinding results into pelletizing plant. The studied materials are from four mines of the different regions of Iron Quadrangle, processed by flotation, magnetic separator and produced from screening with P80 in 8 mm. In this study, we apply for the first time the novelty of electron backscatter diffraction technique for the iron ore phase identification and quantification of the microstructural parameters. The mineralogical and microstructural parameters were introduced as a base in the specific grinding test applied in the industrial routine. Each sample was characterized based on the mineral shape, pores, fractures, polycrystalline hematite, and aggregate of hematite with goethite. The test results demonstrate that there is a strong relationship between the gain of the specific surface area, represented by the K-factor, and the morphological types. |
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| Keywords: | EBSD grinding test iron ore microstructures specific surface |
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