Oxidants for uranium leaching

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dc.contributor.authorHo, Een_AU
dc.contributor.authorRing, RJen_AU
dc.date.accessioned2022-06-27T02:16:13Zen_AU
dc.date.available2022-06-27T02:16:13Zen_AU
dc.date.issued2007-05-24en_AU
dc.date.statistics2022-06-24en_AU
dc.descriptionPhysical copy held by ANSTO Library at DDC 669.2931/5en_AU
dc.description.abstractMost uranium ores are leached with sulfuric acid under oxidising conditions. This paper reviews the oxidants that have been traditionally used in uranium leaching and discusses their merits in the context of overallow sheet considerations. Options for alternative oxidants are also discussed. In acid leaching, ferric ion (Fey) in solution oxidises insoluble uranium(IV) to soluble uranium(VI). Though ferric ion may be added directly, usually an oxidant is added to the circuit to convert ferrous ion to ferric ion in the liquor so that leaching can continue. The most common oxidants are pyrolusite and sodium chlorate. Pyrolusite is relatively cheap but introduces manganese ions into the liquor and consumes twice as much acid as sodium chlorate. Sodium chlorate is a slow reacting oxidant at low temperatures and acidities, and introduces chloride into the leach liquor. Caro ’s acid, HZSO5, is a non-polluting reagent that was used successfully at the Nabarlek uranium mine, and provided very good control of oxidising conditions. Other oxidants that are now being considered to overcome the disadvantages of pyrolusite and sodium chlorate are oxygen, hydrogen peroxide and SO/O2. Some performance data for these oxidants are presented. © The Authorsen_AU
dc.identifier.citationHo, E., & Ring, R. (2007). Oxidants for uranium leaching. Paper presented to the ALTA 2007 Uranium Conference, Rendezvous Observation City Hotel, Perth, Australia, May-24-25 2007.en_AU
dc.identifier.conferenceenddate25 May 2007en_AU
dc.identifier.conferencenameALTA 2007 Uranium Conferenceen_AU
dc.identifier.conferenceplacePerth, Australiaen_AU
dc.identifier.conferencestartdate24 May 2007en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/13313en_AU
dc.language.isoenen_AU
dc.publisherALTA Metallurgical Servicesen_AU
dc.subjectUraniumen_AU
dc.subjectLeachingen_AU
dc.subjectOre processingen_AU
dc.subjectSulfuric aciden_AU
dc.subjectOxidationen_AU
dc.subjectIron compoundsen_AU
dc.subjectManganese ionsen_AU
dc.subjectTemperature range 0065-0273 Ken_AU
dc.subjectSodium chloridesen_AU
dc.subjectHydrogen peroxideen_AU
dc.subjectOxygenen_AU
dc.titleOxidants for uranium leachingen_AU
dc.typeConference Paperen_AU
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