AI Article Synopsis
- The study utilized a radioactive tracer technique to measure the residence time distribution (RTD) of water in gold leaching tanks at the Damang processing plant in Ghana, aiming to assess tank performance and validate design specifications post-upgrade.
- I-131 was injected into the first tank, and both sampling and online methods were employed to track the tracer concentration throughout the system, yielding consistent RTD results.
- The research concluded that the tanks-in-series model effectively described the flow structure, confirming increased mixing and effective volumes that aligned with the plant engineer's expectations following process intensification.
Article Abstract
Measurement and analysis of residence time distribution (RTD) is a classical method to investigate performance of chemical reactors. In the present investigation, the radioactive tracer technique was used to measure the RTD of aqueous phase in a series of gold leaching tanks at the Damang gold processing plant in Ghana. The objective of the investigation was to measure the effective volume of each tank and validate the design data after recent process intensification or revamping of the plant. I-131 was used as a radioactive tracer and was instantaneously injected into the feed stream of the first tank and monitored at the outlet of different tanks. Both sampling and online measurement methods were used to monitor the tracer concentration. The results of measurements indicated that both the methods provided identical RTD curves. The mean residence time (MRT) and effective volume of each tank was estimated. The tanks-in-series model with exchange between active and stagnant volume was used and found suitable to describe the flow structure of aqueous phase in the tanks. The estimated effective volume of the tanks and high degree of mixing in tanks could validate the design data and confirmed the expectation of the plant engineer after intensification of the process.
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| http://dx.doi.org/10.1016/j.apradiso.2011.09.003 | DOI Listing |
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