Response surface methodology (RSM) for optimization of chalcopyrite concentrate leaching with silver-coated pyrite

• Autorzy: Salehi S. , Noaparast M. , Shafaei S. Z.

Identyfikatory

DOI

10.5277/ppmp160239

• Języki publikacji: EN

Abstrakty

EN

This study aims to leach copper from chalcopyrite and optimizing the leaching process, using the response surface methodology (RSM). The RSM, a D-optimal design with four factors in three levels was employed to evaluate the effect of particle size, temperature, silver-coated pyrite to chalcopyrite ratio and redox potential parameters on the copper extraction efficiency. A quadratic model was then proposed by the RSM to correlate leaching variables. The tests results indicated that the model was significant with the experimental data at a correlation coefficient (R2) of 0.96. The most important parameters of copper extraction efficiency were particle size and silver-coated pyrite-to-chalcopyrite ratio, and also the squared term of particle size (A2), temperature (B2) and redox potential (D2). In addition, the interaction between redox potential and silver-coated pyrite-to-chalcopyrite ratio (CD) was significant. It was shown that the finer the particle size the faster the leaching rate of copper. It was also indicated that by increasing silver-coated pyrite to chalcopyrite ratio of 6:1 copper recovery increased. The maximum recovery of copper (71%) was obtained for the particle size of -38 μm, 70 °C, 420 mV of redox potential, silver-coated pyrite-to-chalcopyrite ratio of 6 and leaching time of 8 hours.

Słowa kluczowe

EN

chalcopyrite; copper extraction; silver-coated pyrite; optimization; response surface methodology

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2016
• Tom: Vol. 52, iss. 2
• Strony: 1023--1035
• Opis fizyczny: Bibliogr. 25 poz., rys., tab.

Twórcy

autor

Salehi S.

• Department of Mining Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran

autor

Noaparast M.

• School of Mining Engineering, College of Engineering, University of Tehran, Iran

autor

Shafaei S. Z.

• School of Mining Engineering, College of Engineering, University of Tehran, Iran

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