Beyond-design-basis regimes of uranium stripping and of carbonate regeneration of the solvent


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Beyond-design-basis regimes of centrifugal contactors for U stripping and of mixer–settlers for carbonate regeneration of the solvent, 30% TBP in Isopar M, were studied from the viewpoint of the influence of incomplete uranium stripping on the phase stability of the extraction system in the step of the carbonate scrubbing of the solvent. Dynamic relationship between these two operations was determined. A mathematical model of uranium stripping at stepwise–20% deviation from the nominal value was developed and verified; it was shown that the beyond-design-basis regime develops in such apparatuses within 4 h at the total trial time longer than 8 h. The mathematical relationships obtained were used in the development of software for calculating transient processes that occur when the stream parameters in the course of carbonate regeneration of the solvent change. The beyond-design-basis regime of the solvent regeneration was found to have two regions: region of stoichiometric excess of carbonate ions over uranyl ions with the risk of precipitation and region of excess of uranyl ions over carbonate ions with acidification of the unit and uranium breakthrough with the recycled solvent. The conditions of the tests performed correspond to the second region.

作者简介

E. Puzikov

Khlopin Radium Institute

编辑信件的主要联系方式.
Email: egor_puzikov@mail.ru
俄罗斯联邦, 2-i Murinskii pr. 28, St. Petersburg, 194021

N. Goletskii

Khlopin Radium Institute

Email: egor_puzikov@mail.ru
俄罗斯联邦, 2-i Murinskii pr. 28, St. Petersburg, 194021

B. Zilberman

Khlopin Radium Institute

Email: egor_puzikov@mail.ru
俄罗斯联邦, 2-i Murinskii pr. 28, St. Petersburg, 194021

A. Kudinov

Khlopin Radium Institute

Email: egor_puzikov@mail.ru
俄罗斯联邦, 2-i Murinskii pr. 28, St. Petersburg, 194021

A. Naumov

Khlopin Radium Institute

Email: egor_puzikov@mail.ru
俄罗斯联邦, 2-i Murinskii pr. 28, St. Petersburg, 194021

D. Kukharev

Khlopin Radium Institute

Email: egor_puzikov@mail.ru
俄罗斯联邦, 2-i Murinskii pr. 28, St. Petersburg, 194021

M. Agafonova-Moroz

Khlopin Radium Institute

Email: egor_puzikov@mail.ru
俄罗斯联邦, 2-i Murinskii pr. 28, St. Petersburg, 194021

D. Ryabkov

Khlopin Radium Institute

Email: egor_puzikov@mail.ru
俄罗斯联邦, 2-i Murinskii pr. 28, St. Petersburg, 194021

O. Shmidt

Bochvar High-Tech Research Institute of Inorganic Materials

Email: egor_puzikov@mail.ru
俄罗斯联邦, ul. Rogova 5a, Moscow, 123098

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