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Treatment of uranium ores by natural leaching in Portugal; Traitement par lixiviation naturelle des minerais uraniferes portugais

Conference:

Abstract

The technique described for treating uranium ores by natural leaching has been developed as a result of research carried out in Portugal with a view to determining and eliminating the causes of uranium migration in ores stored in the open. With the natural leaching method, which has been successfully applied to primary uranium ores, the ore is piled up on a waterproof surface and sprayed intermittently with mine water. Pyrite and ferrous sulphate are used as solid reagents and are mixed with the ore in amounts averaging 0.4% and 0.2% respectively. Over 70 000 tons of ore with a U{sub 3}O{sub 8} content of between 0.076 and 0.150% have been treated at five natural leaching plants. The average recovery in these operations was between 57.7 and 85.9%. The average cost was US $3.31/lb U{sub 3}O{sub 8}. (author) [French] Le traitement des minerais uraniferes par lixiviation naturelle est le fruit des recherches effectuees au Portugal dans le but de determiner et d'eliminer les causes de la migration de l'uranium contenu dans les minerais emmagasines a ciel ouvert. La methode de lixiviation naturelle, appliquee avec succes aux mineraux primaires d'uranium, consiste essentiellement en l'arrosage intermittent, avec l'eau des mines, du minerai entasse  More>>
Authors:
Lacerda, J de [1] 
  1. Junta de Energia Nuclear, Lisbonne (Portugal)
Publication Date:
Jun 15, 1967
Product Type:
Conference
Resource Relation:
Conference: Panel on Processing of Low-Grade Uranium Ores, Vienna (Austria), 27 Jun - 1 Jul 1966; Other Information: 7 figs, 7 tabs, 6 refs; Related Information: In: Processing of Low-Grade Uranium Ores. Proceedings of a Panel, 260 pages.
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; COST; LEACHING; NUCLEAR FACILITIES; ORE PROCESSING; PORTUGAL; PYRITE; RADIONUCLIDE MIGRATION; SULFATES; URANIUM; URANIUM MINES; URANIUM ORES; URANIUM OXIDES U3O8; WATER; ACTINIDE COMPOUNDS; ACTINIDES; CHALCOGENIDES; DEVELOPING COUNTRIES; DISSOLUTION; ELEMENTS; ENVIRONMENTAL TRANSPORT; EUROPE; HYDROGEN COMPOUNDS; MASS TRANSFER; METALS; MINERALS; MINES; ORES; OXIDES; OXYGEN COMPOUNDS; PROCESSING; SEPARATION PROCESSES; SULFIDE MINERALS; SULFUR COMPOUNDS; UNDERGROUND FACILITIES; URANIUM COMPOUNDS; URANIUM OXIDES; WESTERN EUROPE
OSTI ID:
21594175
Research Organizations:
International Atomic Energy Agency, Vienna (Austria)
Country of Origin:
IAEA
Language:
French
Other Identifying Numbers:
Other: ISSN 0074-1876; TRN: XA12N1505072622
Availability:
Also available on-line: http://www-pub.iaea.org/MTCD/Publications/PDF/Pub146_web.pdf; Enquiries should be addressed to IAEA, Marketing and Sales Unit, Publishing Section, E-mail: sales.publications@iaea.org; Web site: http://www.iaea.org/books
Submitting Site:
INIS
Size:
page(s) 101-118
Announcement Date:
Sep 06, 2012

Conference:

Citation Formats

Lacerda, J de. Treatment of uranium ores by natural leaching in Portugal; Traitement par lixiviation naturelle des minerais uraniferes portugais. IAEA: N. p., 1967. Web.
Lacerda, J de. Treatment of uranium ores by natural leaching in Portugal; Traitement par lixiviation naturelle des minerais uraniferes portugais. IAEA.
Lacerda, J de. 1967. "Treatment of uranium ores by natural leaching in Portugal; Traitement par lixiviation naturelle des minerais uraniferes portugais." IAEA.
@misc{etde_21594175,
title = {Treatment of uranium ores by natural leaching in Portugal; Traitement par lixiviation naturelle des minerais uraniferes portugais}
author = {Lacerda, J de}
abstractNote = {The technique described for treating uranium ores by natural leaching has been developed as a result of research carried out in Portugal with a view to determining and eliminating the causes of uranium migration in ores stored in the open. With the natural leaching method, which has been successfully applied to primary uranium ores, the ore is piled up on a waterproof surface and sprayed intermittently with mine water. Pyrite and ferrous sulphate are used as solid reagents and are mixed with the ore in amounts averaging 0.4% and 0.2% respectively. Over 70 000 tons of ore with a U{sub 3}O{sub 8} content of between 0.076 and 0.150% have been treated at five natural leaching plants. The average recovery in these operations was between 57.7 and 85.9%. The average cost was US $3.31/lb U{sub 3}O{sub 8}. (author) [French] Le traitement des minerais uraniferes par lixiviation naturelle est le fruit des recherches effectuees au Portugal dans le but de determiner et d'eliminer les causes de la migration de l'uranium contenu dans les minerais emmagasines a ciel ouvert. La methode de lixiviation naturelle, appliquee avec succes aux mineraux primaires d'uranium, consiste essentiellement en l'arrosage intermittent, avec l'eau des mines, du minerai entasse sur des aires impermeabilisees. On utilise comme reactifs solides la pyrite et le sulfate ferreux melanges avec le minerai a raison de 0,4% et 0,2% respectivement en moyenne. Plus de 70 000 t de minerai, dont les teneurs en U{sub 3}O{sub 8} etaient comprises entre 0,076% et 0,150%, ont ete traitees dans cinq installations de lixiviation naturelle ou on a obtenu des recuperations moyennes oscillant entre 57,7% et 85,9%, pour le prix de revient moyen de 3,31 dollars par livre de U{sub 3}O{sub 8}. (author)}
place = {IAEA}
year = {1967}
month = {Jun}
}