Development of a process for the concentration of the strategic tantalum and niobium oxides from tin slags - Université de Lorraine Accéder directement au contenu
Article Dans Une Revue Minerals Engineering Année : 2019

Development of a process for the concentration of the strategic tantalum and niobium oxides from tin slags

E. Allain
  • Fonction : Auteur
Ndue Kanari
  • Fonction : Auteur
  • PersonId : 1000077
F. Diot
  • Fonction : Auteur
J. Yvon
  • Fonction : Auteur

Résumé

The extraction of tin through smelting of cassiterite (SnO 2) has generated considerable amounts of slag in the main production areas of SouthEast Asia, Africa, and South America. Tantalum and niobium naturally occur in cassiterite deposits and are concentrated in the slag during the smelting process. Tin slags have often been disposed as industrial waste despite contents of tantalum and niobium ranging from 2 to 25 %. Conventional hydrometallurgical processes for the concentration of tantalum and niobium oxides utilizing high concentration of strong acids such as HF or H 2 SO 4 are environmentally and economically challenging. This paper describes an original and greener approach for the selective dissolution of the slag amorphous matrix, and the concentration of tantalum and niobium oxides in a solid residue. Starting from a slag containing about 15 % (Ta,Nb) 2 O 5 , sequential alkaline and acid leaching stages resulted in the production of a 63 % (Ta + Nb) oxides concentrate, which is comparable to commercial grade of mineral concentrates.
Fichier principal
Vignette du fichier
EA_NK_Ta_Nb_Tin_Slags.pdf (1.07 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02168911 , version 1 (29-06-2019)

Licence

Paternité - Pas de modifications

Identifiants

Citer

E. Allain, Ndue Kanari, F. Diot, J. Yvon. Development of a process for the concentration of the strategic tantalum and niobium oxides from tin slags. Minerals Engineering, 2019, 134, pp.97-103. ⟨10.1016/j.mineng.2019.01.029⟩. ⟨hal-02168911⟩
81 Consultations
490 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More