Removal of uranium and radium from uranium ores by using sodium containing molten salts

Nobuaki Sato, Tomihiro Taki, Kohta Yamada, Takeo Fujino

Research output: Contribution to conferencePaperpeer-review

Abstract

Separation study of uranium and radium as their mixed oxides from the uranium ores was conducted by the reaction with NaCl or NaOH molten salts followed by leaching with dilute HNO3 with the aim of decontamination of the ore tailing. When the ore was heated in the NaCl melt bubbling with nitrogen or oxygen, even though 50% of uranium remained in the residue, the amount of radium in the residue was selectively reduced to 5-8%. In the case of NaOH melt, on the other hand, the amount of uranium in the residue was reduced to less than 1%, while radium was a few %. The composition of the bubbling gas did not effect the leaching behavior. Agitation of NaOH melt promoted the disintegration of the ore and the formation of mixed oxides.

Original languageEnglish
Pages795-802
Number of pages8
Publication statusPublished - 1999 Dec 1
EventGlobal Symposium on Recycling, Waste Treatment and Clean Technology (REWAS 1999) - San Sebastian, Spain
Duration: 1999 Sep 51999 Sep 9

Other

OtherGlobal Symposium on Recycling, Waste Treatment and Clean Technology (REWAS 1999)
CountrySpain
CitySan Sebastian
Period99/9/599/9/9

ASJC Scopus subject areas

  • Filtration and Separation

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