New digital 3D model of the Grate-Kiln pelletizing process for reduced energy usage and emissions
| Reference number | |
| Coordinator | Luleå tekniska universitet - Strömningslära och experimentell mekanik |
| Funding from Vinnova | SEK 2 400 000 |
| Project duration | August 2017 - June 2021 |
| Status | Completed |
| Venture | The strategic innovation programme for Swedish mining and metal producing industry - SIP Swedish Mining Innovation |
Purpose and goal
The purpose and main goal of the project was to develop a new digital 3D model that can be used to control and optimize the flow in rotary kilns for reduced energy consumption and environmental impact with increased pellet quality. This has been fulfilled through a model/solver implemented in open source code where flow, combustion, heat transfer and bed reactions are included. The project has further demonstrated the possibilities of advanced flow field measurements in industrial settings and clarified how important the fluid mechanics is for the combustion process in the rotary kiln.
Expected results and effects
The implementation of the model can help reduce the environmental foot-print of mining and contribute to sustainability in terms of more optimal use of energy and reduced emissions, as well as increase the quality of the iron ore pellets produced. The results will also form a firm basis for innovative solutions for direct flow regulation and control of flame properties, making it possible to run simulations for predictive purposes when changing process parameters, as well as to detect and prevent errors before they occur to avoid costly production stoppages.
Planned approach and implementation
The project has consisted of four work packages (WP) containing both numerical simulations and experimental measurements in lab scale and in a more real, industrial environment in pilot scale. A certain adjustment of the original time plan had to be made in order to be able to carry out all tasks. However, the work has gone well with regard to the problems and limitations that have arisen due to Covid-19.