액체 카드뮴 음극을 사용한 용융염 전해제련로 전산해석

Computational Analysis for a Molten-salt 티ectrowinner with Liquid Cadmium Cathode

김광락, 정용주, 백승우, 김지용, 권상운, 윤달성, 김시형, 심준보, 김정국, 안도희, 이한수

Abstract

In the present work, an electrowinning process in the LiCl-KCVCd system is considered to model and analyze the electrotransport of the actinide and rare-earth elements. A simple dynamic modeling of this process was performed by taking into account the material balances and diffusion-controlled electrochemical reactions in a diffusion boundary layer at an electrode interface between the molten salt electrolyte and liquid cadmium cathode. The proposed modeling approach was based on the half-cell reduction reactions of metal chloride occurring on the cathode. This model demonstrated a capability for the prediction of the concentration behaviors, a faradic current of each element and an electrochemical potential as function of the time up to the corresponding electrotransport satisψing a given applied current based on a galvanostatic electrolysis. The results of selected case studies including five elements (U, Pu, Am, La, Nd) system are shown, and a preliminary simulation is carried out to show how themodel can be used to understand the electrochemical characteristics and provide betler information for developing an advanced electrowinner.

Key Words : 전해제련로, LiCI-KCI, 액체 카드융 음극, 확산제한 전해이동, 악티늄족 원소, 회토류 원소, Electrowinner, LiCI-KCl, Liquid cadmium cathode, Diffusion-controlled electrotransport, Actinide elements, Rare-earth elements

Reference

JNFCWT

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Waste Society (KRS)

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