Improvement of Copper Recovery of Low-Grade Deposit Using Optimization of Flotation Process Parameters with Hydrofroth as a Frother — Oak Academic Publishing
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Improvement of Copper Recovery of Low-Grade Deposit Using Optimization of Flotation Process Parameters with Hydrofroth as a Frother
School of Mines, Université Officielle de Bukavu, Bukavu, Democratic Republic of the Congo
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Ivanhoe, Kamoa Copper SA, Kolwezi, Democratic Republic of the Congo
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School of Mines, University of Zambia, Lusaka, Zambia
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Department of Mining and Mineral Processing Engineering, School of Mines and Geosciences, University of Dar es Salam, Dar es Salam, Tanzania
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School of Mines, Université Officielle de Bukavu, Bukavu, Democratic Republic of the Congo
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School of Mines, Université Officielle de Bukavu, Bukavu, Democratic Republic of the Congo
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School of Chemical and Mineral Engineering, North-West University (Potchefstroom Campus), Potchefstroom, South Africa
1 School of Mines, Université Officielle de Bukavu, Bukavu, Democratic Republic of the Congo
2 Ivanhoe, Kamoa Copper SA, Kolwezi, Democratic Republic of the Congo
3 School of Mines, University of Zambia, Lusaka, Zambia
4 Department of Mining and Mineral Processing Engineering, School of Mines and Geosciences, University of Dar es Salam, Dar es Salam, Tanzania
5 School of Mines, Université Officielle de Bukavu, Bukavu, Democratic Republic of the Congo
6 School of Mines, Université Officielle de Bukavu, Bukavu, Democratic Republic of the Congo
7 School of Chemical and Mineral Engineering, North-West University (Potchefstroom Campus), Potchefstroom, South Africa
The study uses flotation process optimization to explore how to improve copper recovery from the Kakula deposit. Given the variability in ore grade, achieving high recovery rates and maintaining an optimal copper grade is critical. This research employs the Taguchi experimental design and multi-objective optimization to determine the most effective flotation parameters. Key factors investigated include solid mass percentage, air flow rate, particle size, frother dosage (HYDOFROTH), collector dosage (SIBX), and secondary collector dosage (AERO). The Taguchi method determined optimal conditions for maximum copper recovery at 96.4%, with 14.2% copper content in concentrate. The multi-objective approach provided a more balanced result: 95.4% copper recovery, 48.0% mass pull, 12.2% copper content. Comparing the results obtained by these two methods, it is noted that the multi-objective approach contributes more to the minimisation of silica, 24% versus 35.4%. ANOVA analysis revealed that collector dosage (SIBX) was the most significant factor influencing copper recovery. At the same time, solid mass percentage had the most significant impact on copper content, mass pull, and silica yield. The findings provide practical insights for improving the flotation performance of the Kakula deposit, ensuring higher efficiency and better concentrate quality.
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