New digital 3D model of the Grate-Kiln pelletizing process for reduced energy usage and emissionsProject leaderSofia Larsson, Luleå University of Technology

PartnersLKAB, Taoshi Energiteknik AB

Project duration2017 - 2020

Goals of the project

The main goal is 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 and increased pellet quality.

Additional goals are:

A general simulation methodology that can be used on any complex system involving fluid flow.

Increased understanding of the pelletizing process regarding at least three fluid mechanical related phenomena.

A demonstration of how advanced experimental techniques can be used in harsh industrial environments.

Results so far

Kiln hood

Results so far

Experimental combustion furnace (ECF)

Results so far

Secondaryflow

Secondaryflow

Secondaryflow

Secondaryflow

Side view

Front view

Single jet, no outerstream

Coaxial jet with outer

stream

Secondary flow 50/50 Secondary flow 70/30

Time-averaged results in the vertical center plane

Mean image Root mean squarefluctuations

Mean image Root mean squarefluctuations

Increasedvelocity ratio

Upcoming activities and next step

Refine the simulations Scale up the model Transfer it to an open source code

Finish and publish the obtained results

Mining innovation for a sustainable future