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PhD THESIS PROPOSAL : "Simulation of Pre-reduction of Mn ores in FeMn Submerged Arc Furnaces"

Lieu:  Trappes,France
Type de contrat:  Thèse - CIFRE

Context:

High carbon ferromanganese (HCFeMn) is produced by carbothermic reduction of manganese ores, primarily in submerged arc furnaces (SAF).

SAF used for FeMn are generally circular and have three electrodes. Carbon monoxide is produced in the lower meltingreduction zone and flows through the furnace burden.

The burden is composed of a mix of Mn ores and coke which is used as reductant. It is located in the upper part of the furnace. In this region, known as the pre-reduction zone, CO reacts with the manganese oxides of the ores.

These chemical reactions, when completed, result in a better usage of each mole of carbon and are exothermic. They thus release heat which is a key parameter regarding the overall energy balance of the furnace.

 

Today, the pre-reduction yield in industrial furnaces is estimated to be below 50%.

Optimizing pre-reduction to reach 100% yield has been identified as a priority action in

an Eramet large program called “CO2 reduction” aiming at reducing the overall CO2 emissions in the production of Mn alloys.

Moreover, optimization of pre-reduction would result in other significant gains such as the reduction of the furnaces overall energy consumption.

 

A 4-year program has been launched in Eramet IDEAS to work on this specific subject: the optimization of the pre-reduction inside HCFeMn furnaces’ burden.

 

This program consists in an extensive benchmark and a literature review, the design of an experimental equipment able to reproduce pre-reduction phenomenon at different scale (up to pilot scale), and the development of a numerical model describing this reacting flow-field to improve the knowledge of this

Work context

The PhD student will work most of the time at IJL Nancy, within the ‘Metallurgical process engineering’ research group, also associated with the ‘Laboratory of Excellence DAMAS’, under the supervision of Prof. Fabrice Patisson and Dr. Olivier Mirgaux.

 

She/he will be hired by ERAMET IDEAS through a CIFRE contract. Occasional periods of work will take place in ERAMET IDEAS innovation center in Trappes.

General information

Workplace: Nancy, France

Type of contract: PhD contract (CIFRE with the ERAMET IDEAS company)

Contract period: 36 months

Expected date of employment: Sept. or Oct. 2019

Proportion of work: Full time

Remuneration: from 31 335€ (gross) per year depending on profile and experience

Desired level of education: Master’s or engineering degree in chemical, metallurgical or energy

engineering, with excellent academic record.

Skills

Competences in process engineering, gas-solid reactions, fluid mechanics, heat and mass transfer, and numerical modelling.

Fluent in French and in English.

 

Constraints and risks : No major risk.

About Institut Jean Lamour

The Institut Jean Lamour (IJL) is a joint research unit (UMR 7198) of CNRS and Université de Lorraine It is linked to the Institute of Chemistry of CNRS.

Focused on materials and processes science and engineering, it covers: materials, metallurgy, plasmas, surfaces, nanomaterials and electronics.

It regroups 183 researchers/lecturers, 91 engineers/technicians/administrative staff, 150 doctoral students and 25 post-doctoral fellows.

Partnerships exist with 150 companies and our research groups collaborate with more than 30 countries throughout the world.

Its exceptional instrumental platforms are spread over 4 sites; the main one is located on Artem campus in Nancy.