758 Figure 7 – Cumulative copper recovery increase in Bagdad (Reproduced from Liu et al. 2022). Taken measurements illustrates that the recovery of copper in the upgraded Line A was 2.3% higher at the end of the line, despite the underperformance of Line A compared to Line B at the beginning. The reduced froth recovery in fourth cell (RC-4) may be attributed to equipment wear and inaccurate calibration of the airflow instrument. Overall, these results indicate that the recovery in the line upgraded with a center launder shows significant improvements in copper recoveries compared to the baseline. The process survey conducted in Bagdad included also the study of copper recovery based on different particle sizes. This particle size analysis revealed that the most substantial recovery increase of copper occurred with coarser particles. Specifically, the cumulative recovery of particles larger than 300 m increased by over 16%. This notable improvement in the recovery of coarser particles is supported by literature, which denotes that a shorter froth transport distance and a smaller froth surface area provide stability and prevent bubble bursting caused by the instability of coarser particles (Vallejos et al. 2022). The differences in recovery based on particle size are illustrated in Fig. 8 (Liu et al. 2022). Figure 8 – Size-by-size Cu recovery to rougher concentrate in Bagdad (Reproduced from Liu et al. 2022).
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