Determination of Malfunctions in Gold Processing Tanks by RTD Modelling
نویسنده
چکیده
Radiotracer technique was used to measure the Residence Time Distribution (RTD) of material in 4 leach tanks at AngloGold Ashanti, Iduapriem gold processing plant. The investigation was conducted to determine the mean residence time and possible flow malfunctions in the tanks. The liquid phase of gold ore slurry was traced using I radiotracer which was instantaneously injected into the feed stream of the first tank. RTD curves were generated using sampling data collection method to monitor the radiotracer at tank outlets. The measured RTD data were treated and the Mean Residence Times (MRTs) of material in the tanks determined. For each tank, the experimental MRT calculated from the method of moments exceeded the corresponding theoretical MRT. The experimental curves were simulated using perfect mixers-in-series with exchange model. Results of the simulation indicate exchange of flow between life and stagnant volumes at a very slow rate leading to increase in the MRTs.
منابع مشابه
Nonideal Flow Models in Homogeneous Chemical Reactors
Keywords: Residence time distribution (RTD), moments of RTD, experimental estimation of RTD, RTD of ideal and nonideal flow models, axially dispersed plug flow model, tanks in series model, multiparameter model, dispersion coefficient, microfluid, macrofluid, earliness and lateness of mixing, conversion in nonideal flows.
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