基于“伽马-软测量”的稳定萃取段“镧-铈-镨-钕”四组分定量分析
DOI:
作者:
作者单位:

东华理工大学核科学与工程学院

作者简介:

通讯作者:

中图分类号:

TL99

基金项目:

国家自然科学基金(12105043,12265003);江西省自然科学基金(20224BAB211023);核资源与环境国家重点实验室开放基金项目(2022NRE30)


Quantitative analysis on 'Lanthanum-Cerium-Praseodymium-Neodymium' in the stable extraction stage based on 'gamma ray-soft measurement'
Author:
Affiliation:

School of Nuclear Science and Engineering,East China University of Technology

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    质量配分检测是稀土萃取过程调控的重要依据,皂化P507-煤油萃取镧(La)-铈(Ce)-镨(Pr)-钕(Nd)溶液体系变化剧烈,时变、强耦合等非线性特征明显,且溶液体系无明显颜色变化,现有基于机器视觉和人工神经网络的软测量方法应用效果不佳。为解决以上问题,论文首先采用机理建模法构建四组分定量分析的数理模型,其次通过测量La天然放射性同位素138La@1.436 MeV特征伽马射线强度信息(辅助变量),同时预测四组分质量配分(主变量)信息,最后基于高纯锗探测器开展实验验证。结果表明:La最小可检测质量浓度为1.70 g·L-1,与实验结果相比,La、Ce、Pr、Nd质量浓度预测结果相对误差分别为-3.11%~4.23%、-5.81%~3.74%、-8.16%~6.68%、-19.87%~14.20%,检测灵敏度预测结果相对误差分别为1.33%、5.56%、-3.20%、-0.41%。所提出的“伽马-软测量”方法可实现La、Ce、Pr、Nd四组分高准确度、高灵敏度预测,检测过程不受萃取体系密度、酸度、温度等参数变化的影响,为稀土萃取质量配分检测提供新的技术参考。

    Abstract:

    Quality distribution detection is regarded as a crucial basis for regulating the rare earth extraction process. The variation of the Lanthanum (La), Cerium (Ce), Praseodymium (Pr), and Neodymium (Nd) solution system during the saponified P507-kerosene extraction is significant, showing obvious nonlinear characteristics such as time-varying and strong coupling. Moreover, the solution system exhibits no apparent color change. Existing soft measurement methods based on machine vision and artificial neural networks have shown unsatisfactory application effects. To address these issues, a mechanistic modeling method was first employed to construct a mathematical model for the quantitative analysis of the four components. Subsequently, by measuring the characteristic gamma-ray intensity information of the natural radioactive isotope 138La@1.436 MeV (auxiliary variable), the mass distribution information of the four components (main variable) was predicted simultaneously. Finally, experiments were conducted based on a high-purity germanium detector. The results show that the minimum detectable mass concentration of La is 1.70 g·L-1. Compared with the experimental results, the relative errors of the predicted mass concentrations of La, Ce, Pr, and Nd are -3.11%~4.23%, -5.81%~3.74%, -8.16%~6.68%, and -19.87%~14.20%, respectively. The relative errors of the sensitivity prediction are 1.33%, 5.56%, -3.20%, and -0.41%, respectively. The proposed "gamma ray-soft measurement" method enables high-accuracy and high-sensitivity prediction of the four components La, Ce, Pr, and Nd. The detection process is not affected by changes in extraction system density, acidity, temperature, and other parameters, providing new technical references for rare earth extraction quality distribution detection.

    参考文献
    相似文献
    引证文献
引用本文

王飞亮,赵剑锟,曾韬,等. 基于“伽马-软测量”的稳定萃取段“镧-铈-镨-钕”四组分定量分析[J]. 科学技术与工程, , ():

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2024-04-01
  • 最后修改日期:2024-04-29
  • 录用日期:2024-05-02
  • 在线发布日期:
  • 出版日期:
×
亟待确认版面费归属稿件,敬请作者关注