| About this Abstract |
| Meeting |
2010 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alumina and Bauxite
|
| Presentation Title |
Study on Ore Dressing and Characterization of Different Granulometric Fractions that Compound Bauxite from Pará/Brazil |
| Author(s) |
Fernanda Arruda Nogueira Gomes da Silva, Rachel Dias dos Santos, João Alves Sampaio, Francisco Manoel dos Santos Garrido, Marta Eloisa Medeiros |
| On-Site Speaker (Planned) |
Fernanda Arruda Nogueira Gomes da Silva |
| Abstract Scope |
Bauxite from Northeast of Pará/Brazil was ore dressed and characterized by XRD, XRF, chemical and thermal analysis. XRD was performed to determine the mineral content. Such bauxite is essentially gibbsitic and has been associated with kaolinite, aluminum-goethite, goethite and iron and titanium compounds. XRF analysis was carried out in order to determine the sample’s chemical composition and how its content varied after ore dressing. However, the chemical content of Al2O3available and SiO2reactive was determined by back titration and flame atomic absorption. The results found for the Bayer Process sample were 47.2% and 5.3%, respectively. Thermal analysis was performed as a supplemental technique to observe the bauxite decomposition in the mineralogical phases. Thus, based on stoichiometric relations of the bauxite components decomposition and the mass loss observed in the thermal analysis, it was possible to confirm the following phases: gibbsite, aluminum-goethite and kaolinite. |
| Proceedings Inclusion? |
Definite: A combination print-CD volume |