| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alumina and Bauxite
|
| Presentation Title |
Bayer Process Towards the Circular Economy – Metal Recovery from Bauxite Residue |
| Author(s) |
Paula de Freitas Marques Araújo, Patrícia Magalhães Pereira Silva, Andre Luiz Vilaça do Carmo, Fernando Gama Gomes, Alex Mota dos Santos , Adriano Lucheta, Raphael Vieira Da Costa, Caio Cesar Amorim de Melo, Marcelo Montini |
| On-Site Speaker (Planned) |
Adriano Lucheta |
| Abstract Scope |
In a global scale, 150 million tons of bauxite residue (BR) are produced every year and the total inventory exceeds 2.7 billion tons. BR still contains significative amounts of valuable metals such as Ti (2-12%), Fe (14-45%), Al (4-14%) and rare earth elements, being considered an expressive secondary source of raw materials. Its reuse contributes to the implementation of the circular economy principles in mining sector and environmental impacts mitigation. In 2017, Brazil produced 11 million tons of alumina and around 8.8-16.5 million tons of BR (alumina:BR rate 0.8-1.5). Considering the Fe average value in Brazilian´s BR of 35% and a conservative magnetic recovery rate of 10%, we could potentially recover around 0.3-0.6 million tons of Fe, yearly. Here we evaluated the potential for direct magnetic Fe recovery from a Brazilian BR using different intensities. |
| Proceedings Inclusion? |
Planned: Light Metals |