The Effect of the Redox Potential on the Leaching of Chalcopyrite in Chloride Media

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2008 Vol.45, Issue 1 Next Page

The Effect of the Redox Potential on the Leaching of Chalcopyrite in Chloride Media 염산용액에서의 황동광 침출에 대한 산화환원전위의 영향: 유경근, 이재천, 정진기, 손정수
Kyoungkeun Yoo, Jae-chun Lee*, Jinki Jeong and Jeong-soo Sohn

29 February 2008. pp. 1-7

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Abstract

Redox potential dependence of chalcopyrite leaching has been investigated to improve low leaching rate of chalcopyrite and it was reported that there is an optimum redox potential for high leaching rate in relatively low redox potential zone. In the present study, chalcopyrite leaching test was performed in chloride media with ferric ions at 50℃ or 80℃, and the redox potential dependence was investigated. The concentration of copper increases gradually with time, and then rapidly increases after around 20 minutes at 80℃ and after around 7 hours at 50℃, respectively. Oxidation-reduction potential (ORP) decreases with time because ferrous ions are leached from chalcopyrite. Leaching rate of chalcopyrite is much faster in the experiment at 80℃than at 50℃. There is the highest leaching rate around 440 mV (vs Ag/AgCl), and this result indicates that chalcopyrite leaching depends on redox potential in chloride media.

Keywords

Chalcopyrite

Hydrometallugy

Copper leaching

Redox potential dependence

침출속도를 개선하기 위한 방법으로서 황동광 침출의 산화환원전위 의존성이 연구되었고, 상대적으로 낮은 산화환원전위대에서 높은 침출속도를 나타내는 최적전위가 존재한다고 보고되었다. 본 연구에서는 산화제로서 Fe3+ 이온을 포함하는 염산용액을 사용하여 50℃와 80℃에서 각각 침출실험을 진행하고 염산용액에서 황동광 침출의 산화환원전위 의존성을 조사하였다.구리의 농도는 침출이 진행됨에 따라 증가하였으며,80℃ 실험에서는 20분 후에, 50℃ 실험에서는 7시간 후에 농도가 급격히 증가하였다. 황동광 침출이 진행됨에 따라서 Fe2+이 온농도가 증가하여 산화환원전위는 감소하였다.침출속도는50℃침출실험에 비하여 80℃침출실험에서 빠르게 나타났으며, 440 mV(Ag/AgCl)에서 침출속도가 가장 빠른 것을 알 수 있었다. 이 결과는 염산용액에서도 황동광의 침출은 산화환원전위 의존성을 갖는다는 사실을 나타낸다.

키워드

황동광

습식제련

구리 침출

산화환원전위 의존성

References

유경근 등, 2007, 황동광 제련기술의 특허 동향분석, 한국지구시스템공학회지, 제44권 2호, pp. 169-176.
Balaz, P., 2003, Mechanical Activation in Hydrometallurgy, International journal of mineral processing, Vol. 72, pp. 341-354.
Barta, L, Buban, K., Collins, M. J., and Stiksma, J., 1999, Pressure leaching of chalcopyrte concentrates by dynatec, Copper 99-Cobre 99, Vol. 4(Hydrometallugy of Copper),
The Minerals, Metals and Materials Society, Warrendale, PA, USA, pp. 167-180.
Carranza, F., Palencia, I., and Romero, R., 1997, Silver Catalyzed IBES Process: Application to a Spanish Copper-Zinc Sulphide Concentrate, Part 1, Hydrometallurgy, Vol. 44, pp. 29-42.
Dutrizac, J. E., 1992, The leaching of sulphide minerals in chloride media, Hydrometallugy, Vol. 29, pp. 1-45.
Elsherief, A. E., 2002, The Influence of Cathodic Reduction, Fe2+ and Cu2+ Ions on the Electrochemical Dissolution of Chalcopyrite in Acidic Solution, Minerals Engineering, Vol. 15, pp. 215-223.
Flett, D. S., 2002, Chloride hydrometallugy for complex sulphides: A review, CIM bulletin, Vol. 95, pp. 95-103.
Hiroyoshi, N., Arai, M., Miki, H., Tsunekawa, M., and Hirajima, T., 2002, A New Reaction Model for the Catalytic Effect of Silver Ions on Chalcopyrite Leaching in Sulfuric Acid Solutions, Hydrometallurgy, Vol 63, pp. 257-267
Hiroyoshi, N., Hajime, M., Hirajima, T., and Tsunekawa, M., 2000, A Model for Ferrous-promoted Chalcopyrite Leaching, Hydrometallurgy, Vol. 57, pp. 31-38.
Hiroyoshi, N., Hajime, M., Hirajima, T., and Tsunekawa, M., 2001, Enhancement of Chalcopyrite Leaching by Ferrous Ions in Acidic Ferric Sulfate Solutions, Hydrometallurgy, Vol. 60, pp. 185-197.
Hiroyoshi, N., Hirota, M., Hirajima, T., Tsunekawa, M., 1997, A Case of Ferrous Sulfate Addition Enhancing Chalcopyrite Leaching, Hydrometallurgy, Vol. 47, pp. 37-45.
Hiroyoshi, N., Kuroiwa, S., Miki, H., Tsunekawa, M., and Hirajima, T., 2004, Synergetic Effect of Cupric and Ferrous Ions on Active-Passive Behavior in Anodic Dissolution of Chalocpyrite in Sulfuric Acid Solutions, Hydrometallurgy, Vol. 74, pp. 103-116.
Kametani, H. and Aoki, A., 1985, Effect of suspension potential on the oxidation rate of copper concentrate in a sulfuric acid solution, Metallugical transactions. B, Vol. 16B, pp. 695-705.
Mikhlin, Y. L., Tomashevich, Y. V., Asanov, I. P., Okotrub, A. V., Varnek, V. A., Vyalikh, D. V., 2004, Spectroscopic and Electrochemical Characterization of the Surface Layers of Chalcopyrite (CuFeS2) Reacted in Acidic Solutions, Applied surface science, Vol. 225, pp. 395-409.
Nakazawa, H., Fujisawa, H., and Sato, H., 1998, Effect of Activated Carbon on the Bioleaching of Chalcopyrite Concentrate, International Journal of Mineral Processing, Vol. 55, pp. 87-94.
Peacey, J., Guo, X. J., and Robles, E., 2003, Copper Hydrometallurgy - Current Status, Preliminary Economic, Future Direction and Positioning versus Smelting, Proceeding of the Copper 2003 - Cobre 2003, Vol. 4, Santiago, Chile, pp. 205-222.
Romeo, R., Mazuelos, A., Palencia, I., and Carranza, F., 2003, Copper Recovery from Chalcopyrite Concentrates by the BRISA Process, Hydrometallurgy, Vol. 70, pp. 205-215.
Sanchez, E. C., Umetsu, Y., and Saito, F., 1996, Effect of Iron Powder on Copper Extraction by Acid Leaching of Chalcopyrite Concentrate, Journal of chemical engineering of Japan, Vol. 29, pp. 720-722.
Sandstrom, A., Shchukarev, A., and Paul, J., 2005, XPS Characterization of Chalcopyrite Chemically and Bioleached at High and Low Redox Potential, Mineral Engineering, Vol. 18, pp. 505-515.
Wang, S., 2005, Copper Leaching from Chalcopyrite Concentrates, JOM, Vol. 57, No. 7, pp. 48-51
Zeitler, K. M., 2003, Hydrometallurgical Processes for Copper Concentrates, Proceedings of 16th International Copper Conference, Portugal, pp. 1-27.

Information

Publisher :The Korean Society of Mineral and Energy Resources Engineers
Publisher(Ko) :한국자원공학회
Journal Title :Journal of the Korean Society for Geosystem Engineering
Journal Title(Ko) :한국지구시스템공학회지
Volume : 45
No :1
Pages :1-7

[1] 유경근 등, 2007, 황동광 제련기술의 특허 동향분석, 한국지구시스템공학회지, 제44권 2호, pp. 169-176.

[2] Balaz, P., 2003, Mechanical Activation in Hydrometallurgy, International journal of mineral processing, Vol. 72, pp. 341-354.

[3] Barta, L, Buban, K., Collins, M. J., and Stiksma, J., 1999, Pressure leaching of chalcopyrte concentrates by dynatec, Copper 99-Cobre 99, Vol. 4(Hydrometallugy of Copper),

[4] The Minerals, Metals and Materials Society, Warrendale, PA, USA, pp. 167-180.

[5] Carranza, F., Palencia, I., and Romero, R., 1997, Silver Catalyzed IBES Process: Application to a Spanish Copper-Zinc Sulphide Concentrate, Part 1, Hydrometallurgy, Vol. 44, pp. 29-42.

[6] Dutrizac, J. E., 1992, The leaching of sulphide minerals in chloride media, Hydrometallugy, Vol. 29, pp. 1-45.

[7] Elsherief, A. E., 2002, The Influence of Cathodic Reduction, Fe2+ and Cu2+ Ions on the Electrochemical Dissolution of Chalcopyrite in Acidic Solution, Minerals Engineering, Vol. 15, pp. 215-223.

[8] Flett, D. S., 2002, Chloride hydrometallugy for complex sulphides: A review, CIM bulletin, Vol. 95, pp. 95-103.

[9] Hiroyoshi, N., Arai, M., Miki, H., Tsunekawa, M., and Hirajima, T., 2002, A New Reaction Model for the Catalytic Effect of Silver Ions on Chalcopyrite Leaching in Sulfuric Acid Solutions, Hydrometallurgy, Vol 63, pp. 257-267

[10] Hiroyoshi, N., Hajime, M., Hirajima, T., and Tsunekawa, M., 2000, A Model for Ferrous-promoted Chalcopyrite Leaching, Hydrometallurgy, Vol. 57, pp. 31-38.

[11] Hiroyoshi, N., Hajime, M., Hirajima, T., and Tsunekawa, M., 2001, Enhancement of Chalcopyrite Leaching by Ferrous Ions in Acidic Ferric Sulfate Solutions, Hydrometallurgy, Vol. 60, pp. 185-197.

[12] Hiroyoshi, N., Hirota, M., Hirajima, T., Tsunekawa, M., 1997, A Case of Ferrous Sulfate Addition Enhancing Chalcopyrite Leaching, Hydrometallurgy, Vol. 47, pp. 37-45.

[13] Hiroyoshi, N., Kuroiwa, S., Miki, H., Tsunekawa, M., and Hirajima, T., 2004, Synergetic Effect of Cupric and Ferrous Ions on Active-Passive Behavior in Anodic Dissolution of Chalocpyrite in Sulfuric Acid Solutions, Hydrometallurgy, Vol. 74, pp. 103-116.

[14] Kametani, H. and Aoki, A., 1985, Effect of suspension potential on the oxidation rate of copper concentrate in a sulfuric acid solution, Metallugical transactions. B, Vol. 16B, pp. 695-705.

[15] Mikhlin, Y. L., Tomashevich, Y. V., Asanov, I. P., Okotrub, A. V., Varnek, V. A., Vyalikh, D. V., 2004, Spectroscopic and Electrochemical Characterization of the Surface Layers of Chalcopyrite (CuFeS2) Reacted in Acidic Solutions, Applied surface science, Vol. 225, pp. 395-409.

[16] Nakazawa, H., Fujisawa, H., and Sato, H., 1998, Effect of Activated Carbon on the Bioleaching of Chalcopyrite Concentrate, International Journal of Mineral Processing, Vol. 55, pp. 87-94.

[17] Peacey, J., Guo, X. J., and Robles, E., 2003, Copper Hydrometallurgy - Current Status, Preliminary Economic, Future Direction and Positioning versus Smelting, Proceeding of the Copper 2003 - Cobre 2003, Vol. 4, Santiago, Chile, pp. 205-222.

[18] Romeo, R., Mazuelos, A., Palencia, I., and Carranza, F., 2003, Copper Recovery from Chalcopyrite Concentrates by the BRISA Process, Hydrometallurgy, Vol. 70, pp. 205-215.

[19] Sanchez, E. C., Umetsu, Y., and Saito, F., 1996, Effect of Iron Powder on Copper Extraction by Acid Leaching of Chalcopyrite Concentrate, Journal of chemical engineering of Japan, Vol. 29, pp. 720-722.

[20] Sandstrom, A., Shchukarev, A., and Paul, J., 2005, XPS Characterization of Chalcopyrite Chemically and Bioleached at High and Low Redox Potential, Mineral Engineering, Vol. 18, pp. 505-515.

[21] Wang, S., 2005, Copper Leaching from Chalcopyrite Concentrates, JOM, Vol. 57, No. 7, pp. 48-51

[22] Zeitler, K. M., 2003, Hydrometallurgical Processes for Copper Concentrates, Proceedings of 16th International Copper Conference, Portugal, pp. 1-27.

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