SO2/O-2 as an oxidant in hydrometallurgy

Citation
W. Zhang et al., SO2/O-2 as an oxidant in hydrometallurgy, MINER ENG, 13(13), 2000, pp. 1319-1328
Citations number
40
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Geological Petroleum & Minig Engineering
Journal title
MINERALS ENGINEERING
ISSN journal
0892-6875 → ACNP
Volume
13
Issue
13
Year of publication
2000
Pages
1319 - 1328
Database
ISI
SICI code
0892-6875(200011)13:13<1319:SAAOIH>2.0.ZU;2-J
Abstract
Oxygen mixed with SO2 can function as a powerful oxidant in acid solution. This paper summarises basic studies on the mechanism of SO2/O-2 oxidation, the kinetics of oxidation in acidic media, and potential applications in hy drometallurgy. The SO2/O-2 system readily oxidises Fe(II) to Fe(III) and pr ovides a simple method of regenerating Fe(III) for leaching minerals like C u2S or U3O8. It also oxidises As(III), which in the presence of iron(III) e nables a stable ferric arsenate compound to be precipitated.. A method for the leaching and removal of arsenic front smelter fumes is proposed. Oxidat ion of Mn(II) to Mn(III)/Mn(IV) oxides by SO2/O-2 allows manganese impurity to be removed from leach liquors and electrolytes. (C) 2000 Elsevier Scien ce Ltd. All rights reserved.