RAMR2D network scholarship holders

RAMR2D > Scholars > BEAVOGUI Marie Constance

Affiliated CEAs :

Main supervision:

LOGINOVA Irina Viktorovna, Ural Federal University in Ekaterinburg, i.v.loginova@urfu.ru


TRAORE Sékou, Gamal Abdel Nasser University of Conakry, sktraore@gmail.com

Other supervision and contributions:

LEVARD Clément, Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement, levard@cerege.fr

Additional funding obtained:

Ministry of Higher Education, Scientific Research and Innovation (Guinea)


Scientific publications:

Marie Constance Béavogui, Irina Viktorovna Loginova, AhmedAmara Konaté and Sékou Amadou Condé /Influence of lime (CaO) on low temperature leaching of some types of bauxite from Guinea. Journal physical Sciences, Reviews 2021 https://doi.org/10.1515/psr-2020-0141

Marie Constance Béavogui, Boris Grigorievich Balmaev, Oumar Barou Kaba, Ahmed Amara Konaté and Irina Viktorovna Loginova/ Bauxite enrichment process (Bayer process): Bauxite cases From Sangaredi (Guinea)
and Sierra Leone / Journal AIP conference proceeding 2022 https://doi.org/10.1063/5.0074812

Andrei Shoppert, Dmitry Valeev, Mamodou Malal Diallo, Irina Loginova,Marie Constance Beavogui , Abdukhakim Rakhmonov , Yevgeniy Ovchenkov and Denis Pankratov/ High-Iron Bauxite Residue (Red Mud) Valorization Using Hydrochemical Conversion of Goethite to Magnetite/ [Material] 2022 https://www.mdpi.com/1996-1944/15/23/8423

Marie Constance Béavogui, L'extraction de l'alumine à partir de la bauxite gibbsite: Overview/Edition Notre Savoir 2023, https://www.morebooks.de/shop-ui/shop/product/9786204634739


RAMR2D > Scholars > BEAVOGUI Marie Constance

Thesis defence: 19.05.2023
The special nature of Guinean bauxite processing

Study of the potential for increasing alumina extraction from Guinean bauxites using different beneficiation methods

Summary of doctoral topic:

My PhD thesis focuses on the optimization of Guinean bauxite leaching in order to increase alumina production and reduce red mud emissions. The study aims to develop the alumina industry in the Boke region of Guinea by proposing technological solutions to improve the technical and economic performance of production. The use of lime and the pre-treatment of bauxite for low-temperature leaching are considered effective methods. The aim is to optimize the leaching of Guinean bauxite in order to increase alumina production while reducing red mud emissions. In addition, a study is being carried out into the use of red mud as a raw material for iron metallurgy, requiring an appropriate approach to the treatment and utilization of this waste.

Summary of results:

The study focused on the physico-chemical and mineralogical characterization of West African bauxites, particularly from Guinea and Sierra Leone, revealing significant diversity in composition and mineralogy. The addition of CaO during low-temperature leaching of Sangaredi and Fria bauxites improved leaching efficiency, with specific effects varying according to bauxite type. Pre-treatment and leaching studies have shown that bauxite enrichment prior to leaching can improve alumina extraction efficiency. In addition, optimization of the red mud leaching process revealed significant effects of temperature, duration and solution concentration on aluminum dissolution, enabling process improvement and waste recovery. These results provide valuable information for the aluminium extraction industry.

CEREGE, April 2023
CEREGE, April 2023

Integration of the thesis project into the local, regional and international scientific community:

Today, bauxite ore is attracting the attention of the world's major aluminum-producing industries. It is therefore imperative that technological innovations in this sector will be a great step forward, and reduce the energy cost argument of processing bauxite on Guinean soil. Information on the raw material for alumina production in Guinea and other countries will be provided. A detailed analysis of the main components and impurities of bauxite raw materials will be presented.

Their behavior in the technological cycle of the main alumina production process, the Bayer process, will be studied in depth. Environmental assessment, now a major concern in bauxite processing, is an important part of our research. Some technological schemes for obtaining alumina used in refineries are described. All in all, this would enable rational use of resources with the aim of making a considerable contribution to the sustainable development of our country.

Perspective at the end of the thesis:

At the end of my thesis, I would like to continue to contribute to the development of my country by pursuing my research and sharing my knowledge in the field of mineral recovery, and more specifically of bauxite. Building on the results obtained, I plan to pursue my research to find innovative solutions for the treatment of red mud, enabling the complete transformation of bauxite and offering new economic and environmental prospects for Guinea. My aim is to implement concrete, sustainable projects that will enable the Guinean mining industry to move towards a more efficient and environmentally-friendly approach.

Perspective after the end of the thesis:

After completing my thesis, I aspire to apply my research findings and expertise to contribute to the sustainable development of the Guinean mining industry. I wish to collaborate with industry players, government agencies and research institutions to implement innovative solutions for bauxite beneficiation and red mud treatment, thus promoting economic growth and environmental sustainability in Guinea.