Effects of hematite surface characteristicson filtration process
AUTOR(ES)
Graça, Leonardo Martins, Lagoeiro, Leonardo Evangelista, Galéry, Roberto, Peres, Antônio Eduardo Clark
FONTE
Rem: Rev. Esc. Minas
DATA DE PUBLICAÇÃO
2016-06
RESUMO
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 optimized operation conditions. Particle size distribution and specific surface area are controlled during the grinding operations. Moisture, however, is controlled during filtration 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: granular 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 %.
Documentos Relacionados
- Acute effects of antiglomerular basement membrane antibody on the process of glomerular filtration in the rat.
- Heterogeneous fenton process using the mineral hematite for the discolouration of a reactive dye solution
- Dispersion degree and zeta potential of hematite
- Nucleoid structure in freeze fractures of Streptococcus faecalis: effects of filtration and chilling.
- Effects of filtration methods on the neutralization yield of crude marine fish oil