| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alumina & Bauxite
|
| Presentation Title |
Numerical Simulations for Performance Optimization of Circulating Fluidized Bed Calciner |
| Author(s) |
Bharathesh Kumar, Abhishek Seth, Chandrakala Kari, Vilas Tathavadkar, Ashish Mishra, Prasanta Bose, Amit Gupta |
| On-Site Speaker (Planned) |
Amit Gupta |
| Abstract Scope |
Large-scale circulating fluidized beds are used as calciners in alumina refineries. Alumina product quality (Loss On Ignition) depends on heat transfer pattern and particle trajectories in the calciner. The operational parameters of fluidization such as air and fuel flow rates along with pressure drop across the furnace, are sensitive to changes in production rate. In this context, Lagrangian Discrete phase model is used to simulate gas-solid hydrodynamics and visualize the thermal profile. The model is validated against the actual calciner temperature. Simulations are performed for various hydrate feed rate, air and fuel flow rate. The results revealed a strong influence of fluidization air flow rate and its split to primary & secondary air on the overall thermal profile. Therefore, an optimum ratio of primary to secondary air flow rate was deduced to achieve the desired thermal profile for varied production rates. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Modeling and Simulation, Other, Other |