Iron ore classification by XRD-Rietveld and cluster analysis

Authors

  • Fábio Ramos Dias de Andrade Instituto de Geociências, Departamento de Mineralogia e Geotectônica, Universidade de São Paulo - USP
  • Luciano de Andrade Gobbo PANalytical Inc., São Paulo, SP
  • Lyvia Fernanda Amaral Sousa Instituto de Geociências, Departamento de Mineralogia e Geotectônica, Universidade de São Paulo - USP

DOI:

https://doi.org/10.11606//issn.2316-9095.v16i2p19-24

Keywords:

Iron ore, X-ray diffraction, Rietveld method, Cluster analysis.

Abstract

This study establishes a routine for quantitative phase analysis by X-ray diffraction (XRD-Rietveld) in iron ore samples. Studied samples came from Quadrilátero Ferrífero, Southeastern Brazil, and are mainly composed by hematite, magnetite, goethite, quartz and kaolinite, being divided in three clusters: cluster 1 (n = 8), characterized by the presence of hydrated phases goethite (25 to 72 wt %), kaolinite (< 25 wt %) and gibbsite (< 10 wt %), plus hematite (7 to 54 wt %) and quartz (2 to 19 wt %); cluster 2 (n = 16), which consists of hematite (22 to 81 wt %) and quartz (2 to 58 wt %) and smaller proportions of goethite (< 22 wt %) and kaolinite (< 13 wt %); and cluster 3 (n = 3), that has a predominance of quartz (62 to 74 wt %) and smaller amounts of hematite (17 to 33 wt %) and kaolinite (< 5 wt %). Classification of ores by XRD-Rietveld  and cluster analysis is a fast, low-cost and reliable option for substituting ore classification with chemical analysis.

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Author Biography

  • Fábio Ramos Dias de Andrade, Instituto de Geociências, Departamento de Mineralogia e Geotectônica, Universidade de São Paulo - USP


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Published

2016-07-28

Issue

Vol. 16 No. 2 (2016)

Section

Articles

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How to Cite

Andrade, F. R. D. de, Gobbo, L. de A., & Sousa, L. F. A. (2016). Iron ore classification by XRD-Rietveld and cluster analysis. Geologia USP. Série Científica, 16(2), 19-24. https://doi.org/10.11606//issn.2316-9095.v16i2p19-24