| About this Abstract |
| Meeting |
2010 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alumina and Bauxite
|
| Presentation Title |
New Polymers for Improved Flocculation of High DSP-Containing Muds |
| Author(s) |
Matthew Davis, Qi Dai, H.-L Tony Chen, Matthew Taylor |
| On-Site Speaker (Planned) |
Matthew Davis |
| Abstract Scope |
The production of alumina from bauxite requires effective solid-liquid separation in gravity thickeners to generate liquor containing low amounts of suspended solids. As global resources of high quality bauxite are depleted and efforts are made to exploit lower quality deposits which contain increased levels of reactive silica, this separation becomes more difficult. This is an expected consequence of increased levels of desilication product (DSP) and other silica-derived mineral species in the mud residue which are poorly flocculated by conventional polymeric flocculants. It has been discovered that polymers incorporating silane functionality show improved flocculation of suspended DSP solids when added to the slurry in combination with hydroxamated polyacrylamide (HXPAM). Recent developments will be presented to demonstrate the utility of these new molecules for improved clarification of red mud-containing slurries generated in the Bayer Process. |
| Proceedings Inclusion? |
Definite: A combination print-CD volume |