749 subprocesses is described by Falutsu and Dobby (1989). Fig. 1 describes the relationship between collection and froth zone recoveries, as defined by Eq. 1 (Finch and Dobby. 1990). A@ = A"AA 1−A"U1−AAY (1) where Vn represents the total recovery, V3 is the froth recovery, and VD denotes the collection zone recovery. Figure 1 – Overall recovery based on froth and collection zone recoveries. 2. FROTH ZONE OPTIMIZATION IN LARGE FLOTATION CELLS The significant increase in flotation cell sizes has introduced new challenges to efficient froth management. To address these challenges, larger cells require effective solutions to optimize froth stability and transport, ensuring efficient operation. This section examines the current issues arising from larger froth surface parameters and explores how the innovative design of the center launder can be implemented to enhance process performance and the recovery of valuable minerals. 2.1 Evaluation of Current Challenges in Froth Management In recent years, the size of mechanical flotation cells has trended towards larger volumes (Bermudez et al. 2022). Nowadays, the average size of flotation cells is 1000 times larger than the beginning of the 1990s, when the technology was patented (Lopez-Pacheco 2021). When examining the last four decades, the size of the flotation cells has increased tenfold, reaching volumes larger than 600 m3 (Corona-Arroyo et al. 2021). Fig. 2 shows this significant increase in flotation tank sizes in recent decades, based on the cell sizes launched by Metso.
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