| About this Abstract |
| Meeting |
2010 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alumina and Bauxite
|
| Presentation Title |
Development of Particle Breakdown and Alumina Strength during Calcination |
| Author(s) |
Benny Erik Raahauge, Claus Jensen-Holm, Susanne Wind |
| On-Site Speaker (Planned) |
Benny Erik Raahauge |
| Abstract Scope |
Since the replacement of rotary kilns with stationary calciners, the impact from hydrate properties and calcination technology on the quality of Smelter Grade Alumina (SGA) have been studied frequently. F.L.Smidth are studying the complex interaction between calcining conditions, particle breakdown and development of alumina particle strength in both bench - scale and full scale calcination units using conventional analytical techniques. The bench – scale unit is simulating the pre-calcination step at 320 – 380°C, common to all stationary calciners and the final calcination stage at 1075°C in Gas Suspension Calciners without Holding Vessel. The calcining capacity of the full scale units are ranging from 2200 – 4500 tpd of SGA and covers stationary calciners with and without Holding Vessel. Representative hydrate samples are calcined and compared from more than eight (8) different alumina refineries. The first results of the above work will be presented with focus on how the calcining conditions impacts the properties of calcined industrial hydrates with respect to particle strength and particle breakdown. |
| Proceedings Inclusion? |
Definite: A combination print-CD volume |