The work is focused on the rotary-kilns at LKAB and theirs functionalities and robustness. Rotary-kilns are large cylindrical constructions, measuring up to 7.5×40 m. The cylinder is made of steel and because of the high temperatures it has an insulating lining consisting of bricks. The bricks are exposed to very tough conditions: high temperatures, temperature variations, chemical degradation, wear, load oscillation (rotation of the kiln in combination with the weight of the brick layer itself and the load of pellets) and more. Commonly high-alumina brick are used for this application.
To study the process in detail, numerical modelling and simulations will be used. The idea is to work both on a global and a local level to study the behaviour of the furnace during operation. The main purpose of this work is to create numerical models to predict the influence of mechanical and thermo-mechanical effects on the entire furnace system for predicting errors and improve service life.
The project is funded by LKAB.