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

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)
Publication Information
Resources Recycling / v.16, no.5, 2007 , pp. 65-70 More about this Journal
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.
Keywords
RTD model; solvent extraction; stimulus-response method; multistage extractor;
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