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Abstract
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Article Information:
Determination of Malfunctions in Gold Processing Tanks by RTD Modelling
C.P.K. Dagadu, E.H.K. Akaho, K.A. Danso and H.A. Affum
Corresponding Author: C.P.K. Dagadu
Submitted: 2011 July, 07
Accepted: 2011 September, 07
Published: 2012 February, 15 |
Abstract:
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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 131I 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.
Key words: 131I, mean residence time, radiation detector, residence time distribution, stagnant volume, tanks-in-series model,
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Cite this Reference:
C.P.K. Dagadu, E.H.K. Akaho, K.A. Danso and H.A. Affum, . Determination of Malfunctions in Gold Processing Tanks by RTD Modelling. Research Journal of Applied Sciences, Engineering and Technology, (04): 262-268.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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