MINERAL CONTAMINANTS OF THE SEDIMENTARY KAOLIN ORE FROM IPIXUNA MINE, BRAZIL

Authors

DOI:

https://doi.org/10.18316/rca.v11i3.4008

Keywords:

Fe-Ti Contaminants, Kaolin ore Contaminants, Sedimentary Kaolin.

Abstract

The sedimentary kaolin ore of the Ipixuna Mine, in the Brazilian Amazon, contains mineral contaminants such as anatase, hematite and goethite, among others, which change the original white color of kaolin blocks to red, yellow, gray and purple. The main objective of the present study was to identify the mineral contaminants in the ROM kaolin, the textures and their relationships with the deposition environment. Binocular stereomicroscopy and X-ray diffraction were used to define the paragenesis of contaminants from different places of the ore, as well as to characterize the deposition conditions. The contaminants change the white color of kaolin ore to red, yellow, gray and purple. Red is associated with disseminated goethite and hematite in the kaolin ore. Yellow is associated with disseminated quartz, muscovite and anatase in the kaolin ore. Gray results from thin kaolinite multilayers containing low and high concentrations of anatase. Purple results from the disseminated hematite in the kaolin ore.

Author Biographies

Sydney Sabedot, Universidade La Salle - UNILASALLE

Programa de Pós-Graduação em Avaliação de Impactos Ambientais

Carlos Otávio Petter, Universidade Federal do Rio Grande do Sul - UFRGS

Departamento de Engenharia de Minas

Carlos Hoffmann Sampaio, Universidade Federal do Rio Grande do Sul - UFRGS

Departamento de Metalurgia

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Published

2017-11-27

Issue

Vol. 11 No. 3 (2017)

Section

Artigos

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