Öz
The effects of roasting temperature (200-800 °C), roasting time (15-120 min) and acid type (nitric acid, hydrochloric acid and sulfuric acid) on recovery of copper from chalcopyrite concentrate by roasting in stagnant air media-acid leaching method were investigated and most suitable roasting temperature, roasting time and acid type for high copper recovery were determined. The roasted chalcopyrite concentrates were leached under the standard leaching conditions (room temperature, 1 g/10 mL solid/liquid ratio, 300 rpm/min stirring speed, 60 minutes leaching time, 0.5 N acid concentration). Increase in roasting temperature up to 500 oC has positive effect on recovery of copper. Above 500 oC, increase of temperature does negative effect. 500 ° C was chosen to be most suitable roasting temperature for roasting-acid leaching procces of chalcopyrite concentrate. The most suitable roasting time is 60 minutes. There are no significant effect on the copper recovery of advanced roasting times. The recovery of copper obtained from leaching with nitric acid solution is the highest but iron amount passed to solution media under this condition is also the highest. The copper recovery obtained from leaching with nitric acid solution of 0.5 N of chalcopyrite concentrate roasted at 500 ° C is 99.0%. The iron content of the solution is 21.4% under the same conditions
Anahtar Kelimeler
Acid leaching Chalcopyrite concentrates Copper Recovery Roasting
Kaynakça
- Adebayo, A.O., Ipinmoroti, K.O., Ajayi, O.O., 2003. Dissolution kinetics of chalcopyrite with hydrogen peroxide in sulphuric acid medium. Chemical and Biochemical Engineering Quarterly, 17:213–218. Al-Harahsheh, M., Kingman, S., Al- Harahsheh, A., 2008. Ferric chloride leaching of chalcopyrite: Synergetic effect of CuCl2. Hydrometallurgy, 91: 89-97.
- Bahar, N., 2004. Kalkopirit konsantresinin persülfatlı ortamda liçinin incelenmesi, Fırat Üniversitesi, Fen Bilimleri Enstitisü,Yüksek Lisans Tezi, Elazığ.
- Bahar, N., 2014. Recovery of copper from chalcopyrite concentrate by sulphation roasting-water and hydrochloric acid leaching. Conference Applied Science, Seul. International Engineering and
- Bahar, N., Altundoğan, H.S., Tümen, F., 2012. Kalkopiritten elde edilen liç çözeltilerinden demirin uzaklaştırılması üzerine bir araştırma. 10. Ulusal Kimya Mühendisliği Kongresi, 3-6 Eylül 2012, İstanbul. N.T., Bailey, Woods, S.I., 1974. A comparasion of two rapid methods for the analyses of copper smelting slags by atomic absorption spectrometry. Analytica Chimica Acta,69: 19-25.
- Cai, Y., Chen, X., Ding, J., Zhou, D., 2012. Leaching mechanism for chalcopyrite in hydrochloric acid. Hydrometallurgy, 113: 109–118. J.E., Dutrizac, 1989. Elemental sulfur formation during the ferric sulfate leaching of chalcopyrite. Canadian Metallurgical Quarterly, 28: 337-344.
- Hackl, R.P., Dreisinger, D.B., Peters, E., King, J.A., 1995. Passivation of chalcopyrite during oxidative leaching in sulfate media. Hydrometallurgy, 39: 25–48.
- Hirato, T., Majima, H., Awakura, Y., 1987. The leaching of chalcopyrite with ferric sulfate. Metallurgical and Materials Transactions B, 18: 489–496.
- Hua, Y., Cai, C., Cui, Y., 2006. Microwave enhanced roasting of copper sulfide concentrate in the presence of CaCO3. Separation Purification Technology, 50: 22-29.
- Lu, J., Dreisinger, D., 2013. Copper chloride leaching from chalcopyrite and bornite concentrates containing high levels of impurities Hydrometallurgy, 138: 40–47.
- Lu, Z.Y., Jeffrey, M.I., Lawson, F., 2000. The effect of chloride ions on the dissolution of chalcopyrite in acidic solutions. Hydrometallurgy, 56: 189– 202.
- Marsden, J.O., Wilmot, J.C., 2007. Medium- temperature copper concentrates-Part I: Chemistry and process initial development. Minerals Processing, 24: 193-204. Metallurgical
- Olubambi, P.A., Borode, J.O., Ndlovu, S., 2006. Sulfuric acid leaching of zinc and copper from Nigerian complex sulphide ore in the precence of hydrogen peroxide. The Journal of Southern African Institute of Mining and Metallurgy, 106: 765-770.
- Qui, T.S., Nie, G.H., Wang, J.F., Cui, L.F., 2007. Kinetic process of oxidative leaching of chalcopyrite under low oxygen pressure and low temperature. Transactions of Nonferrous Metals Society of China, 17: 418–422.
- Riveros, G., Marin, T., Puga, C., 2004. Lime- concentrate roasting studies-effect of activated Engineering, 17: 469-471. Minerals
- Ruiz, M.C., Montes, K.S., Padilla, R., 2011. Chalcopyrite chloride media at ambient pressure. Hydrometallurgy, 109: 37–42.
- Sokic, M., Ilıc, I., Zivkovic, D., Vuckovic, N., 2008. Investigation of mechanism and kinetics of chalcopyrite concentrate oxidation process. Metabk, 47: 109- 113.
- Solis-Marcial, O.J., Lapidus, G.T., 2013. Improvement dissolution in acid media using polar organic solvents. Hydrometallurgy, 131: 120–126. chalcopyrite
- Solis-Marcial, O.J., Lapidus, G.T., 2014. Chalcopyrite leaching in alcoholic acid media. Hydrometallurgy, 147: 54–58.
- Qian, G., Li, J., Li, Y., Gerson, A.R., 2014. Probing impurities chalcopyrite conditions. 195–20. of leaching on of controlled
- Hydrometallurgy, 149:
- Vogel, A.I., 1989. Vogel’s Textbook of quantitative chemical analysis. Fifth Edition, John Wiley and Sons, New York, USA, 906 p.
Öz
Kalkopirit konsantresinden durgun hava ortamında sülfatlaştırıcı kavurma-asit liçi yöntemi ile bakır (Cu(II)) kazanılması üzerine, kavurma sıcaklığının (200-800 oC), kavurma süresinin (15-120 dk) ve asit türünün (nitrik asit, hidroklorik asit ve sülfürik asit) etkileri incelendi ve yüksek bakır kazanımı için en uygun kavurma sıcaklığı, kavurma süresi ve asit türü belirlendi. Kavrulmuş kalkopirit konsantreleri, standart liç koşulları altında (oda sıcaklığı, 1 g/10 mL katı/sıvı oranı, 300 dev/dk karıştırma hızı, 60 dakika liç süresi, 0.5 N asit derişimi) liç edildi. Kavurma sıcaklığının artırılması, 500 oC' ye kadar bakır kazanımı üzerine olumlu etki meydana getirmiştir. 500 oC' nin üzerindeki sıcaklık artışları ise, bakır ekstraksiyon verimini düşürmüştür. Bu nedenle, 500 oC, kalkopiritin kavurma-asit liçi prosesi için en uygun kavurma sıcaklığı olarak seçilmiştir. En uygun kavurma süresi, 60 dakikadır. İleri kavurma sürelerinin bakır kazanımı üzerine önemli etkisi olmadığı gözlendi. Asit türüne göre bakır ekstraksiyon verimleri nitrik asit> hidroklorik asit> sülfürik asit şeklindedir. Nitrik asit çözeltisi liçinden elde edilen bakır kazanımı en yüksektir. Aynı zamanda, bu şartlarda çözelti ortamına geçen demir miktarının da en yüksek olduğu gözlendi. 500 oC' de kavrulmuş kalkopirit konsantrelerinin 0.5 N nitrik asit çözeltisi ile liçinden elde edilen bakır kazanımı %99.0' dur. Aynı şartlarda çözeltiye geçen demir miktarı %21.4' tür.
Anahtar Kelimeler
Kaynakça
- Adebayo, A.O., Ipinmoroti, K.O., Ajayi, O.O., 2003. Dissolution kinetics of chalcopyrite with hydrogen peroxide in sulphuric acid medium. Chemical and Biochemical Engineering Quarterly, 17:213–218. Al-Harahsheh, M., Kingman, S., Al- Harahsheh, A., 2008. Ferric chloride leaching of chalcopyrite: Synergetic effect of CuCl2. Hydrometallurgy, 91: 89-97.
- Bahar, N., 2004. Kalkopirit konsantresinin persülfatlı ortamda liçinin incelenmesi, Fırat Üniversitesi, Fen Bilimleri Enstitisü,Yüksek Lisans Tezi, Elazığ.
- Bahar, N., 2014. Recovery of copper from chalcopyrite concentrate by sulphation roasting-water and hydrochloric acid leaching. Conference Applied Science, Seul. International Engineering and
- Bahar, N., Altundoğan, H.S., Tümen, F., 2012. Kalkopiritten elde edilen liç çözeltilerinden demirin uzaklaştırılması üzerine bir araştırma. 10. Ulusal Kimya Mühendisliği Kongresi, 3-6 Eylül 2012, İstanbul. N.T., Bailey, Woods, S.I., 1974. A comparasion of two rapid methods for the analyses of copper smelting slags by atomic absorption spectrometry. Analytica Chimica Acta,69: 19-25.
- Cai, Y., Chen, X., Ding, J., Zhou, D., 2012. Leaching mechanism for chalcopyrite in hydrochloric acid. Hydrometallurgy, 113: 109–118. J.E., Dutrizac, 1989. Elemental sulfur formation during the ferric sulfate leaching of chalcopyrite. Canadian Metallurgical Quarterly, 28: 337-344.
- Hackl, R.P., Dreisinger, D.B., Peters, E., King, J.A., 1995. Passivation of chalcopyrite during oxidative leaching in sulfate media. Hydrometallurgy, 39: 25–48.
- Hirato, T., Majima, H., Awakura, Y., 1987. The leaching of chalcopyrite with ferric sulfate. Metallurgical and Materials Transactions B, 18: 489–496.
- Hua, Y., Cai, C., Cui, Y., 2006. Microwave enhanced roasting of copper sulfide concentrate in the presence of CaCO3. Separation Purification Technology, 50: 22-29.
- Lu, J., Dreisinger, D., 2013. Copper chloride leaching from chalcopyrite and bornite concentrates containing high levels of impurities Hydrometallurgy, 138: 40–47.
- Lu, Z.Y., Jeffrey, M.I., Lawson, F., 2000. The effect of chloride ions on the dissolution of chalcopyrite in acidic solutions. Hydrometallurgy, 56: 189– 202.
- Marsden, J.O., Wilmot, J.C., 2007. Medium- temperature copper concentrates-Part I: Chemistry and process initial development. Minerals Processing, 24: 193-204. Metallurgical
- Olubambi, P.A., Borode, J.O., Ndlovu, S., 2006. Sulfuric acid leaching of zinc and copper from Nigerian complex sulphide ore in the precence of hydrogen peroxide. The Journal of Southern African Institute of Mining and Metallurgy, 106: 765-770.
- Qui, T.S., Nie, G.H., Wang, J.F., Cui, L.F., 2007. Kinetic process of oxidative leaching of chalcopyrite under low oxygen pressure and low temperature. Transactions of Nonferrous Metals Society of China, 17: 418–422.
- Riveros, G., Marin, T., Puga, C., 2004. Lime- concentrate roasting studies-effect of activated Engineering, 17: 469-471. Minerals
- Ruiz, M.C., Montes, K.S., Padilla, R., 2011. Chalcopyrite chloride media at ambient pressure. Hydrometallurgy, 109: 37–42.
- Sokic, M., Ilıc, I., Zivkovic, D., Vuckovic, N., 2008. Investigation of mechanism and kinetics of chalcopyrite concentrate oxidation process. Metabk, 47: 109- 113.
- Solis-Marcial, O.J., Lapidus, G.T., 2013. Improvement dissolution in acid media using polar organic solvents. Hydrometallurgy, 131: 120–126. chalcopyrite
- Solis-Marcial, O.J., Lapidus, G.T., 2014. Chalcopyrite leaching in alcoholic acid media. Hydrometallurgy, 147: 54–58.
- Qian, G., Li, J., Li, Y., Gerson, A.R., 2014. Probing impurities chalcopyrite conditions. 195–20. of leaching on of controlled
- Hydrometallurgy, 149:
- Vogel, A.I., 1989. Vogel’s Textbook of quantitative chemical analysis. Fifth Edition, John Wiley and Sons, New York, USA, 906 p.
Ayrıntılar
| Birincil Dil | Türkçe |
|---|---|
| Bölüm | Makaleler |
| Yazarlar | |
| Yayımlanma Tarihi | 7 Eylül 2015 |
| Gönderilme Tarihi | 7 Eylül 2015 |
| Yayımlandığı Sayı | Yıl 2015 Cilt: 1 Sayı: 1 |
