CAJ | 학술논문

进行了不同电流密度（40～160 mA/cm2）下电解制备四价铀的研究。研究结果表明，采用动态膜电解制备四价铀，能在保证六价铀转化率的前提下维持较高的电流效率，最终保证了四价铀制备过程的高效率。但在电解过程后期（大部分六价铀已转化为四价铀），若采用高电流密度，电流效率迅速下降，而采用低电流密度时仍能维持较高的电流效率。为进一步提高四价铀制备过程的电流效率，研究了程序控制电流密度阶梯减小的电解方式对电解过程后期的电流效率的影响。研究结果表明，与恒定电流密度电解方式相比，采用阶梯形减小电流密度的电解方式，可有效地提高电解过程的电流效率，有助于减少副反应的发生。
진행료불동전류밀도（40～160 mA/cm2）하전해제비사개유적연구。연구결과표명，채용동태막전해제비사개유，능재보증륙개유전화솔적전제하유지교고적전류효솔，최종보증료사개유제비과정적고효솔。단재전해과정후기（대부분륙개유이전화위사개유），약채용고전류밀도，전류효솔신속하강，이채용저전류밀도시잉능유지교고적전류효솔。위진일보제고사개유제비과정적전류효솔，연구료정서공제전류밀도계제감소적전해방식대전해과정후기적전류효솔적영향。연구결과표명，여항정전류밀도전해방식상비，채용계제형감소전류밀도적전해방식，가유효지제고전해과정적전류효솔，유조우감소부반응적발생。
The preparation of uranous ion from uranyl nitrate at different current densi-ties (40-160 mA/cm2 ) was investigated in this paper .The results show that membrane electrolysis can ensure high uranyl conversion ratio and maintain high current efficiency during most time of the electrolysis process .However ,in the latter part of the process (most of the uranyl ions are converted to uranous ion ) ,w hen current density is high , current efficiency declines rapidly ;low current density is beneficial to maintain high current efficiency .T herefore ,a preprogrammed automatic control for a step decreasing current density was studied to improve the current efficiency further .Compared with the constant current density ,the step decreasing current density can effectively improve the current efficiency of the electrolysis process and reduce side reactions .