| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Electrode Technology for Aluminum Production
|
| Presentation Title |
CFD Modelling of Air Injection Nozzles in Coke Calcination Kilns, Identification of the Best Compromise Between Carbonaceous Deposit Formation and Kiln Performance |
| Author(s) |
Marie-Josee Dion, Hans Darmstadt, Louis-Michel Malouin, Eric Duplain, Debbie Soriano, Sunny Huang |
| On-Site Speaker (Planned) |
Marie-Josee Dion |
| Abstract Scope |
Rio Tinto operates three coke calcination plants in Canada. The kilns differ in size and production capacity, but also in the design of the nozzles for third air injection. At one site (calciner A) especially, carbonaceous deposits form on the surface of kiln refractories. Computational Fluid Dynamics (CFD) was used to simulate the impact of different nozzle designs on deposit formation. It was shown for calciner A that the design of the nozzles contributes to higher gas velocities and strong vortex. These conditions favour entrainment of fine coke particles, thought to be the origin of deposit formation. The simulation showed that entrainment could be reduced by a nozzle redesign similar to the other two sites. However, any redesign would be accompanied by a lower coke temperature in the calcination zone and thus a poorer process performance. The simulation was used to identify the best compromise between deposit formation and kiln performance. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Modeling and Simulation, Other, Other |