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- Title
Caracterização tecnológica de rejeito de minério de ferro.
- Authors
Gomes, Marcos Antônio; Pereira, Carlos Alberto; Peres, Antônio Eduardo Clark
- Abstract
This paper addresses the characterization of fines stocked in a pond as tailings from an iron ore concentrator. The characterization consisted of size analyses by wet screening, chemical analyses by ICP, and mineralogical analyses by X-ray diffraction. The next stage consisted of technological tests. Two concentration routes were evaluated at bench scale: the first (route I) consisting of classification (0.15mm), magnetic separation (-1.0+0.15mm), desliming and flotation (-0.15mm); and the second (route II) consisting of magnetic separation (-1.0mm global), aiming at achieving a concentrate adequate for use in the metallurgical industry. The size distribution of the iron ore fines indicated 8.21% above 0.150mm and 58.81% passing 0.045mm. The calculated average chemical composition of the sample is 48.08% Fe, 20.58% SiO2, and 3.16% Al2O3. The iron minerals identified by X-ray diffraction were: hematite, martite, magnetite, and goethite; and the detected gangue minerals were: quartz, gibbsite, and kaolinite. The best performance came from route II, magnetic separation only: weight recovery 68.00%, metallurgical recovery 90.81%, 67.54% Fe, 1.50% SiO2, 0.49% Al2O3.
- Subjects
IRON ores; METAL tailings; ANALYTICAL chemistry; X-ray diffraction; MAGNETIC separation of ores; HEMATITE; APATITE; QUARTZ
- Publication
Rem: Revista Escola de Minas, 2011, Vol 64, Issue 2, p233
- ISSN
0370-4467
- Publication type
Article
- DOI
10.1590/S0370-44672011000200016