Component content distribution profile control in rare earth countercurrent extraction process

Hui Yang; Fangping Xu; Rongxiu Lu; Yongquan Ding

doi:10.1016/j.cjche.2014.09.046

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Component content distribution profile control in rare earth countercurrent extraction process

过程系统工程与过程安全 | Updated：2026-01-06

- Component content distribution profile control in rare earth countercurrent extraction process
- Chinese Journal of Chemical Engineering Vol. 23, Issue 1, Pages: 192-198(2015)
- Affiliations：
  
  2 Key Laboratory of Advanced Control & Optimization of Jiangxi Province,Nanchang,China,330013
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2014.09.046
  CLC：
- Published：2015
- Accepted：
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Hui Yang, Fangping Xu, Rongxiu Lu, Yongquan Ding. Component content distribution profile control in rare earth countercurrent extraction process[J]. Chin.J.Chem.Eng., 2015, 23(1): 192-198.
DOI：

Hui Yang, Fangping Xu, Rongxiu Lu, Yongquan Ding. Component content distribution profile control in rare earth countercurrent extraction process[J]. Chin.J.Chem.Eng., 2015, 23(1): 192-198. DOI： 10.1016/j.cjche.2014.09.046.

摘要

Abstract

Considering that the on-line measurement and automatic control of element component content (ECC) are difficult to perform in rare earth cascade extraction process

the ECC distribution profile is dynamically regulated at all stages to assess the effect of product purity control. Focusing on the theory of countercurrent extraction

the technology parameters and pre-setting flow-rates during the extract process are designed. Under varying process parameters

a novel step by step model is also proposed for each stage to analyze the impact on the distribution profile change. Combining the mass balance model and ECC changing trend at the monitoring stage

the ECC distribution profile can be automatically regulated by dynamically compensating the related extract or scrubbing liquid flow-rate. To this end

the required product purity at the two outlets is achieved. Based on Wincc and Matlab dynamic simulators

a specific Pr/Nd cascade extraction process is used to illustrate and demonstrate the application of the present approach.

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