A better understanding of the behaviour of pulverised coal particles and lance tip design

Description de l'offre

Country:

FRANCE

Region:

LORRAINE

Sector:

ArcelorMittal Europe - Flat Carbon

Unit:

Site:

R & D Process Maizières les Metz

Field of activity:

Research and Development / Metallurgy Innovation

Title of internship:

A better understanding of the behaviour of pulverised coal particles and lance tip design

Subject of the internship:

Study and simulate the transport of coal particles in blast furnace lances and better understand the effect of lance tip design on particle dispersion and combustion.

Increasing Pulverized Coal Injection (PCI) in blast furnace operations is an important research subject for the steel industry due to its effect on increasing productivity, lowering operating costs, extending coke oven life and decreasing greenhouse emissions. In usual operations, coal particles are transported with gaseous nitrogen and are injected inside the tuyere with a lance. The particles are then heated due to the contact with hot air, and combustion occurs with a release of volatile matter.
A CFD model based on a lagrangian approach coupled with combustion and heat transfer is currently being used at ArcerlorMittal to predict the combustibility of the coal particles in the raceway of a blast-furnace and to optimise injection conditions. However, the behaviour of these particles inside the injection lance is still not very well understood and the effect of the lance tip design on particle dispersion and combustion still needs to be investigated. The purpose of this training is to analyse and develop a CFD submodel capable of predicting the transport of particles inside the lance and their dispersion once they exit into the tuyere.
A literature survey on multiphase modelling of particle transport in pipes will first be realised. The CFD model will then be developed and experimental measurements will be used to validate the modelling approach. Finally, the injection in industrial conditions will be simulated. Lance tip design will be optimised in order to enhance the dispersion and combustion of the coal particles.

Profil recherché

Applicant Profile:

Fluid mechanics background with preliminary competencies in multiphase flows
Good communication and analytical skills
Knowledge of the Ansys Fluent package is a plus.

Education:

Chemical Engineering, Fluid Mechanics

Level of education:

MASTER (Bac+4/5)

Duration of the internship:

6 months

Period of the internship:

February or March 2017 (flexible)

Managers of the internship:

Ghassan GHAZAL
Tel:
Email: ************@*******.**

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