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<p>The acid leaching behavior of copper (Cu) and cobalt (Co) in complex copper ores was investigated via varying and optimizing various leaching parameters to enhance recovery. The study evaluated the effects of different grinding methods (ball mill and Isamill), reaction temperature (25 to 80 ℃), sulfuric acid concentration (0 to 2.0&#xa0;M), solid/liquid ratio (10% to 30%), stirring speed (100 to 500&#xa0;rpm), and leaching time (0 to 2.5&#xa0;h) on Cu and Co recovery from Baluba and Luanshya low-grade ores. Furthermore, kinetic analysis of Co recovery from Luanshya complex ore was studied. The Cu and Co recovery from both ores increased with increasing reaction temperature, H<sub>2</sub>SO<sub>4</sub> concentration, stirring speed, and leaching time. The optimum recovery of Cu and Co from both ores occurred at reaction temperature of 80 ℃, sulfuric acid concentration of 0.5&#xa0;M, stirring speed of 300&#xa0;rpm, and leaching time 1.5&#xa0;h. Moreover, cobalt was co-leached together with copper due to higher correlation coefficient (<i>R</i><sup>2</sup>), suggesting a degree of correlation of cobalt to copper mineral phases in both ores. In addition, the kinetic analysis of Co recovery from Luanshya ore at 30 to 75 ℃ via an Avrami model with <i>R</i><sup>2</sup> &gt; 97% indicated an activation energy of 11.42&#xa0;kJ/mol, suggesting diffusion control through product layer. These findings provide critical insights for optimizing leaching processes in complex ore treatment.</p>

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A Comparative Study on Copper and Cobalt Recovery from Acid Leaching of Complex Ores

  • 期刊论文

  • 发表日期：

    2025年3月22日

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  • Gairong Wang,
  • Hongying Yang,
  • Suxing Zhao,
  • Yanhua Liu

摘要

The acid leaching behavior of copper (Cu) and cobalt (Co) in complex copper ores was investigated via varying and optimizing various leaching parameters to enhance recovery. The study evaluated the effects of different grinding methods (ball mill and Isamill), reaction temperature (25 to 80 ℃), sulfuric acid concentration (0 to 2.0 M), solid/liquid ratio (10% to 30%), stirring speed (100 to 500 rpm), and leaching time (0 to 2.5 h) on Cu and Co recovery from Baluba and Luanshya low-grade ores. Furthermore, kinetic analysis of Co recovery from Luanshya complex ore was studied. The Cu and Co recovery from both ores increased with increasing reaction temperature, H2SO4 concentration, stirring speed, and leaching time. The optimum recovery of Cu and Co from both ores occurred at reaction temperature of 80 ℃, sulfuric acid concentration of 0.5 M, stirring speed of 300 rpm, and leaching time 1.5 h. Moreover, cobalt was co-leached together with copper due to higher correlation coefficient (R2), suggesting a degree of correlation of cobalt to copper mineral phases in both ores. In addition, the kinetic analysis of Co recovery from Luanshya ore at 30 to 75 ℃ via an Avrami model with R2 > 97% indicated an activation energy of 11.42 kJ/mol, suggesting diffusion control through product layer. These findings provide critical insights for optimizing leaching processes in complex ore treatment.