Development of RTD Model of the Mixer-Settler-Type Extractor Using the Stimulus-Response Method

자극-반응법(反應法)을 이용(利用)한 혼합침강형(混合沈降型) 추출장치(抽出裝置)의 RTD 모델 개발(開發)

  • Lee, Jin-Young (Minerals & material processing research DIV., Korea Institute Geoscience and Mineral Resources) ;
  • Kim, Joon-Soo (Minerals & material processing research DIV., Korea Institute Geoscience and Mineral Resources) ;
  • Lee, Hoo-In (Minerals & material processing research DIV., Korea Institute Geoscience and Mineral Resources) ;
  • Sohn, Jeong-Soo (Minerals & material processing research DIV., Korea Institute Geoscience and Mineral Resources)
  • 이진영 (한국지질자원연구원 자원활용소재연구부) ;
  • 김준수 (한국지질자원연구원 자원활용소재연구부) ;
  • 이후인 (한국지질자원연구원 자원활용소재연구부) ;
  • 손정수 (한국지질자원연구원 자원활용소재연구부)
  • Published : 2007.10.27

Abstract

This study presents the findings of the experiments that were conducted on single- and multi-stage solvent extractors using the stimulus-response method, with the am of identifying flow characteristics of the material inside the mixer-settler-type extractor. The results of this study show that the response characteristics of a single-stage mixer is the same as that of a completely stirred tank reactor (CSTR), and that the lag time of a mixer-settler-type extractor increases with the number of its extraction stages. The experimental data for the single- and multiple-stage extractors were analyzed using K-RTD, a response analysis program, to obtain a retention time distribution (RTD) model of one-stage and four-stage extractors. The correlation coefficient between the calculated values and the experimental data was 0.963 for the one-stage extractor and 0.995 for the four-stage extractor, showing quite a good correlation.

자극-반응(stimulus-response method)법을 이용하여 1단과 다단 혼합침강형 추출장치의 물질흐름특성을 규명하기 위한 실험을 수행하였다. 실험 결과, 1단 추출장치의 혼합조의 반응특성은 CSTR과 동일한 결과를 나타내었으며 혼합-침강조의 반응특성에서는 시간 지연 효과가 나타나며, 단수가 증가할수록 시간지연효과는 증가하였다. 1단과 다단 추출장치의 반응특성 실험결과를 RTD모델 해석프로그램인 K-RTD를 이용하여 분석하여 1단 및 다단 추출기의 RTD을 개발하였다. 본 연구에서 개발한 1단 및 다단 혼합침강조형 추출기의 RTD 모델에 의한 계산값과 실험값에 대한 상관 계수는 각각 0.963과 0.995로 비교적 높은 것을 확인하였다.

Keywords

References

  1. Hossein, A. et al., 1998 : Residence time distributions in SX-EW equipment, Int. J. Miner. Process, 54, pp. 235-242 https://doi.org/10.1016/S0301-7516(98)00010-6
  2. Bazin, C.M. Hodouin, D., 1993 : Residence time distribution modeling for mineral process evaluation, CIM Bull. 81, 115-125
  3. Kordosky, G.A., 1992 : Copper solvent extraction - the state of the art. J. Mer. 44(5), 40-45
  4. Hanson, C. and Sherif, M., 1970 : Hydrodynamic studies on two multistage mixer-settler, Can. J. Chem. Eng., 48, 132-134 https://doi.org/10.1002/cjce.5450480203