MINERALOGICAL CHARACTERIZATION OF GOLD ORE OF THE RIO PARACATU MINERAÇÃO (RPM), AIMING AT THE DETERMINATION OF TITANIUM¿BEARING MINERALS / CARACTERIZAÇÃO MINERALÓGICA DO MINÉRIO DE OURO DA RIO PARACATU MINERAÇÃO (RPM), VISANDO A DETERMINAÇÃO DE MINERAIS PORTADORES DE TITÂNIO
AUTOR(ES)
RONALD ROJAS HACHA
DATA DE PUBLICAÇÃO
2010
RESUMO
This work presents studies in Minerals Characterization of gold ore sample from RPM-Kinross with objective to identify their titanium-bearing minerals and to assess its behavior in different size fraction (spectrum release). The methodology involved particle size analysis and minerals separation (separation in dense medium and magnetic separation), followed of mineralogical studies by XRay Diffraction, Optical Microscopy and Scanning Electron Microscopy (SEM) by using the Mineral Liberation Analyzer-MLA. The products obtained were submitted to Chemical Analysis of X-Ray Fluorescence. The analysis of X-Ray Fluorescence revealed that the sample studied was formed essentially by SiO2 (66,4%), Al2O3 (14,2%), Fe2O3 (7,22%) and TiO2 (1%). The studies were focused in six different sizes (-300+212; -212+150; -150+104; -104+74; -74+53 and - 53+37um). ). About 20% of the material from all fractions material is sunk (dense medium), composed mainly of SiO2 (35%), Fe2O3 (30%), Al2O3 (>7%) and TiO2 (<5%). The floated fraction was composed mainly of SiO2 and Al2O3. The XRD of the sunken fraction indicated the presence of ilmenite, rutile and anatase. The sunken fractions were subjected to magnetic separation in the Frantz separator at different current intensities (0.3 to 1.75A), this operation was concentrated up to 8 wt% TiO2 in the fraction -104 +74um and 0.5A. The sunken fractions were subjected to systematic studies in the SEM system with MLA, confirming the presence of ilmenite, rutile and anatase as the titanium-bearing minerals. The gangue has been release of the mineral carrier of titanium was approximately 1% wt%, the denim has released more than 90% wt%. From the results it was observed that it is possible to concentrate the TiO2 contained in the ore.
ASSUNTO(S)
minerios de ouro gold ore titanio titanium caracterizacao de minerios ore characterization
ACESSO AO ARTIGO
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