Flotation of Chromite as Pre-Treatment of Olivine Before Carbonation for CO2 Sequestration

Laura Turri1, Hervé Muhr1, Cristielen Rech1, 2, François Lapicque1, *
1 Laboratoire Réactions et Génie des Procédés, CNRS Université de Lorraine, 54001 Nancy, France.
2 Universidade de Caxias do Sul, UCS - Caxias do Sul, Brasil.

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Creative Commons License
© 2017 Turri et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Laboratoire Réactions et Génie des Procédés, CNRS Université de Lorraine, 54001 Nancy, France; Tel: +33(0)383175266; E-mail:


Background and Objective:

For the sake of optimal beneficiation of the products formed in the chemical sequestration of CO2 on silicates, extraction of the chromite has been carried out prior to carbonation, by flotation in a lab-scale column.


Industrial-grade olivine and serpentine were tested. Flow conditions e.g. gas flow rate, stirring, particle diameter of silicates, and physicochemical considerations (composition if the electrolyte solution) have been examined to optimize the separation efficiency in terms of chromite recovery or enrichment factor.


The high performance observed with chromite-enriched olivine allows a multistage flotation process from low-chromite minerals blends to be designed.


The lower performance with native olivine was attributed to the existence of mixed chromite-silicate particles.

Keywords: Separation techniques, Flotation, Mineral recovery, Multiphase flows, Olivine, Chromite.