An investigation on the dissolution of synthetic brannerite (UTi 2O6)

Charalambous, F, Ram, R, McMaster, S, Tardio, J and Bhargava, S 2013, 'An investigation on the dissolution of synthetic brannerite (UTi 2O6)', Hydrometallurgy, vol. 139, pp. 1-8.

Document type: Journal Article
Collection: Journal Articles

Title An investigation on the dissolution of synthetic brannerite (UTi 2O6)
Author(s) Charalambous, F
Ram, R
McMaster, S
Tardio, J
Bhargava, S
Year 2013
Journal name Hydrometallurgy
Volume number 139
Start page 1
End page 8
Total pages 8
Publisher Elsevier BV
Abstract A number of different uranium minerals are processed in different regions of the world to produce the uranium that is used to generate electricity. The three main types of uranium minerals that are found at the world's largest single uranium bearing ore body at Roxbury Downs, South Australia are uraninite (nominally UO2), coffinite [U(SiO4) 1 - x(OH)4x], and brannerite [U(Ti, Fe)2O 6]. Detailed knowledge of the influence of temperature, [H 2SO4] and [Fe]/solution oxidation-reduction potential (ORP) on the dissolution of uraninite are well known, yet little information on the influence of the aforementioned on the dissolution of brannerite has been reported in the literature. In this study the influence of three key parameters on the rate of synthetic brannerite (UTi2O6) dissolution was investigated. The parameters that were investigated included temperature, [H2SO4] and [Fe(III)]. Of these parameters [H 2SO4] and temperature were found to have the most significant effect on the rate/overall extent of UTi2O6 dissolution under the test conditions used. Tests conducted on synthetic brannerite residues combined with fresh synthetic brannerite showed that decreases in dissolution rates observed during the dissolution of synthetic brannerite were predominantly not due to decreasing brannerite slurry concentration. The significant decreases in dissolution observed were most likely due to one or more of the following: changes in surface composition/surface passivation, changes in surface morphology and/or changes in particle size.
Subject Physical Chemistry not elsewhere classified
Resources Engineering and Extractive Metallurgy not elsewhere classified
Keyword(s) Leaching
Synthetic brannerite
Synthetic brannerite dissolution
DOI - identifier 10.1016/j.hydromet.2013.06.017
Copyright notice © 2013 Elsevier B.V. All rights reserved
ISSN 0304-386X
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Citation counts: TR Web of Science Citation Count  Cited 10 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 7 times in Scopus Article | Citations
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