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  1 - Experimental investigation of flotation tailing leaching for copper recovery by using a batch mixing tank
  Jalil Pazhoohan Hossein Beiki
  10.30495/jest.2022.26918.3589
  Background and objectives: According to increase in copper demand and reduce high-grade resources, in this research, copper recovery from flotation tailings have been studied in a laboratory mixing tank experimentally. Flotation tailing should be reused judiciously beca More

  Background and objectives: According to increase in copper demand and reduce high-grade resources, in this research, copper recovery from flotation tailings have been studied in a laboratory mixing tank experimentally. Flotation tailing should be reused judiciously because of its negative effects on the environment caused by building up of these industrial wastes in surroundings. Material and Methodology: The leaching experiments have been carried out in a stirred stainless-steel tank, at a constant temperature of 25oC. Sulfuric acid with 98% purity was used as a solvent in the leaching process. The weight of flotation tailings used in experiments was 18 kg. Using various amount of water, different pulp density was achieved. The experiments were done with solid weight percentages of 30%, 35%, 40% and 45% in water. Findings: The results of this study revealed that suddenly addition of acid to the tank due to sudden change of acid concentration caused to increase the efficiency of the leaching process. When acid was added to pulp suddenly, dissolution of iron from tailings was lower than that in gradual addition of acid condition. Solid particles residence time are less due to sudden addition of acid condition. Discussion and Conclusion: The amount of consumed acid in the experiments varied from 31 to 54 kg/t with respect to pulp density. According to experimental conditions, sample contained 40% solid, as appropriate feed for recovery of copper from flotation tailing was recommended. For a solid percent of 40wt% and residence time 15 minutes, copper recovery reached 92.67%. Manuscript profile