The effect of tailings recirculation on the kinetic response of laboratory-scale reactor-separator flotation cells well-described by a plug-flow regime
Luis Vinnett , Cristóbal López , Juan Yianatos , Francisca Justel , Ahmad Hassanzadeh
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Abstract
The application of intensified flotation cells, also known as reactor-separator cells, has become widespread. The tailings recirculation back to a feed conditioning tank is a unique characteristic of these cells compared to mechanical cells and columns. This short communication evaluates, by simulation, the impact of the volume of this conditioning tank on the overall (exhaustion) kinetic response of a flotation cell that is well-described as a plug-flow reactor. The results show that the overall flotation response only converges to that of a plug-flow reactor when the volume of the conditioning tank is negligible regarding the cell volume. However, the exhaustion response proves to be representable as a first-order system, with an apparent rate constant kapp. This apparent rate constant is strongly correlated with the rate constant in the evaluated cell, allowing for comparisons with other flotation machines and systems.
期刊介绍：
The purpose of the journal is to provide for the rapid publication of topical papers featuring the latest developments in the allied fields of mineral processing and extractive metallurgy. Its wide ranging coverage of research and practical (operating) topics includes physical separation methods, such as comminution, flotation concentration and dewatering, chemical methods such as bio-, hydro-, and electro-metallurgy, analytical techniques, process control, simulation and instrumentation, and mineralogical aspects of processing. Environmental issues, particularly those pertaining to sustainable development, will also be strongly covered.
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