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Title: Effects of hematite surface characteristics on filtration process.
Authors: Graça, Leonardo Martins
Lagoeiro, Leonardo Evangelista
Galery, Roberto
Peres, Antônio Eduardo Clark
Keywords: Hematite
Optical microscopy
Issue Date: 2016
Citation: GRAÇA, L. M. et al. Effects of hematite surface characteristics on filtration process. Revista Escola de Minas, v. 69, p. 199-205, 2016. Disponível em: <>. Acesso em: 11 jul. 2016.
Abstract: In iron ore pelletizing plants a range of process parameters such as particle size distribution, specific surface area, and moisture, must be controlled to achieve opti¬mized operation conditions. Particle size distribution and specific surface area are con¬trolled during the grinding operations. Moisture, however, is controlled during filtra¬tion of the ground products. This work investigates the relationship between particle morphology, filter cake moisture and filter capacity. The samples were taken during the filtration tests and referred to three different blends presenting distinct mineralogical features and similar chemical compositions in order to investigate the effects of only the hematite surface characteristics. Six types of morphology are distinguished: granu¬lar hematite, tabular hematite, martitic hematite, polycrystalline hematite, hematite-goethite aggregates and goethite. For each filtration test, the filter cloth product was characterised. The characterisation analysis revealed that blends containing martitic hematite concentration above 11.45 percent increased substantially the filter capacity. However, it had also caused an increasing in final moisture content that reached values around 10.0 % compared with industrial moisture specification that can vary on the range of 8.5 to 9.5 %.
ISSN: 1807-0353
metadata.dc.rights.license: A Revista Escola de Minas - REM - autoriza o depósito de cópia de artigos dos professores e alunos da UFOP no Repositório Institucional da UFOP. Licença concedida mediante preenchimento de formulário online em: 12 set. 2013.
Appears in Collections:DEGEO - Artigos de periódicos

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