Effects of lead nitrate and pre-aeration on the deportment of base/precious metals in cyanide leaching of a pyritic refractory gold concentrate

• Autorzy: Deveci Hacı , Yazıcı Ersin Yener , Celep Oktay , Mercimek Murat , Demirel Cumhur , Çakmak Serkan , Cingöz Melih Baki , Kavlu Ömer Hami , Kömürcü Hüseyin

Identyfikatory

DOI

10.37190/ppmp/166259

• Języki publikacji: EN

Abstrakty

EN

This study was undertaken to improve gold and silver extraction from a pyritic gold flotation concentrate, which assayed 11 g/t Au, 42 g/t Ag, 0.21% Cu, 3.57% Zn, and 31% Fe. Direct cyanide leaching of the concentrate at 1.5 g/L NaCN yielded a low gold extraction (37%), confirming its refractory nature. Effects of lead nitrate (200-500 g/t Pb(NO₃)₂) and pre-aeration (24 h) before cyanide leaching at 1.5-3.5 g/L NaCN were investigated. Earlier studies have focused on the impact of these parameters on gold leaching. Besides gold, this study demonstrated the behaviour of silver and base metals (copper and zinc) from the pyritic gold concentrate. Adding lead nitrate had a negligible effect on gold extraction whilst improving silver extraction. Dissolution of copper was substantially suppressed by adding lead nitrate, i.e., from 23% (no Pb(NO₃)₂) to 4% (500 g/t Pb(NO₃)₂) over 24 h. Zinc dissolution was negligible (≤0.01%). Pre-aeration of the concentrate improved the gold and silver extractions by 4-14% and 23-44% at the subsequent cyanide leaching (1.5-3.5 g/L NaCN). However, it did not affect the leaching of copper. Only negligible leaching of zinc (≤0.6%) occurred during cyanide leaching. Pre-aeration also reduced cyanide consumption in subsequent cyanide leaching (1.5 g/L NaCN), i.e., from 2.83 kg/t to 2.03 kg/t NaCN per solids. These results suggested that lead nitrate can improve silver extraction while suppressing copper dissolution, which would be advantageous in the leaching-adsorption circuit (CIP), mitigating the dissolved copper-associated problems. Pre-aeration can also be suitable for improved gold/silver extractions and reduced reagent consumption.

Słowa kluczowe

EN

gold; cyanide leaching; pyrite; copper; refractory ore; lead nitrate

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2023
• Tom: Vol. 59, iss. 5
• Strony: art. no. 166259
• Opis fizyczny: Bibliogr. 24 poz., tab., wykr.

Twórcy

autor

Deveci Hacı

• Karadeniz Technical University, Faculty of Engineering, Mining Engineering Department, 61080, Trabzon, Türkiye

autor

Yazıcı Ersin Yener

• Karadeniz Technical University, Faculty of Engineering, Mining Engineering Department, 61080, Trabzon, Türkiye

autor

Celep Oktay

• Karadeniz Technical University, Faculty of Engineering, Mining Engineering Department, 61080, Trabzon, Türkiye

autor

Mercimek Murat

• Yıldız Bakır Mining Inc. 29100, Gümüşhane, Türkiye

autor

Demirel Cumhur

• Yıldız Bakır Mining Inc. 29100, Gümüşhane, Türkiye

autor

Çakmak Serkan

• Yıldız Bakır Mining Inc. 29100, Gümüşhane, Türkiye

autor

Cingöz Melih Baki

• Yıldız Bakır Mining Inc. 29100, Gümüşhane, Türkiye

autor

Kavlu Ömer Hami

• Yıldız Bakır Mining Inc. 29100, Gümüşhane, Türkiye

autor

Kömürcü Hüseyin

• Yıldız Bakır Mining Inc. 29100, Gümüşhane, Türkiye

Bibliografia

• BAS, A. D., KUCUK, A., YAZICI, E. Y., DEVECI, H., 2012. Assesment of ammoniacal ammonium sulphate leaching as a pretreatment process for copper bearing gold ores, XIII. International Mineral Processing Symposium, 10-12 October, Bodrum, Türkiye, 563-569.
• CELEP, O., 2015. Altın Cevherlerinin Zenginleştirilmesi (Processing of Gold Ores), Türkiye Alim Kitapları, ist ein Imprint der, Deutschland/Almanya, ISBN 13 9783639672138, p. 221.
• CELEP, O., ALP, İ., DEVECI, H., 2010. Effect of lead nitrate on cyanidation of antimonial refractory gold and silver ores, International Conference of Modern Management of Mine Producing, Geology and Environmental Protection, SGEM, June, Bulgaria, 639–644.
• CELEP, O., BAS, A.D., YAZICI, E.Y., ALP, İ., DEVECI, H., 2015. Improvement of silver extraction by ultra-fine grinding prior to cyanide leaching of the plant tailings of a refractory silver ore, Mineral Processing and Extractive Metallurgy Review, 36, 227–236.
• CORRANS, I.J., ANGOVE, J.E., 1991. Ultra fine milling for the recovery of refractory gold, Minerals Engineering, 4 (11), 763–776.
• DESCHÊNES, G., LACASSE, S., FULTON, M., 2003. Improvement of cyanidation practice at Goldcorp Red Lake Mine, Minerals Engineering 16, 503–509.
• DESCHÊNES, G., LASTRA, R., BROWN, J. R., JIN, S., MAY, O., GHALI, E., 2000. Effect of lead nitrate on cyanidation of gold ores: progress on the study of the mechanisms, Minerals Engineering, 13 (12), 1263–1279.
• DESCHÊNES, G., MCMULLEN, J., ELLIS, S., FULTON, M., ATKIN, A., 2005. Investigation on the cyanide leaching optimisation for the treatment of KCGM gold flotation concentrate—phase 1, Minerals Engineering, 18, 832–838.
• DESCHÊNES, G., RAJALA, J., PRATT, A. R., GUO, H., FULTON, M., MORTAZAVI, S., 2011. Advances in the cyanidation of silver, Minerals & Metallurgical Processing, 28, 37–43.
• DESCHÊNES, G., ROUSSEAU, M., TARDIF, J., PRUD’HOMME, P.J.H., 1998. Effect of the composition of some sulphide minerals on cyanidation and use of lead nitrate and oxygen to alleviate their impact, Hydrometallurgy, 50, 205–221.
• DEVECI, H., YAZICI, E.Y., CELEP, O., 2018. An overview of pretreatment and leaching options for gold extraction from refractory copper-gold ores, 16th International Mineral Processing Symposium and Exhibition (IMPS), Antalya, Türkiye, 23-25 October, 439–451.
• DUNNE, R., 2005. Flotation of Gold and Gold-bearing Ores (Chapter 14), Advances in Gold Ore Processing, Adams A.D. (ed.), Developments in Mineral Processing, Vol 15, Elsevier, Amsterdam, The Netherlands, 309–344.
• FENG, Q., YANG, W., WEN, S., WANG, H., ZHAO, W., HAN, G., 2022. Flotation of copper oxide minerals: A review, International Journal of Mining Science and Technology, 32, 1351–1364.
• FENG, Q., WANG, M., ZHANG, G., ZHAO, W., HAN, G., 2023. Enhanced adsorption of sulfide and xanthate on smithsonite surfaces by lead activation and implications for flotation intensification, Separation and Purification Technology, 307, 122772.
• GUNYANGA, F.P., MAHLANGU, T., ROMAN, R.J., MUNGOSHI, J., MBEVE, K., 1999. An acidic pressure oxidation pretreatment of refractory gold concentrates from the Kwekwe roasting plant-Zimbabwe, Minerals Engineering, 12 (8), 863–875.
• IGLESIAS, N., CARRANZA, F., 1994. Refractory gold-bearing ore: a review of treatment methods and recent advances in biotechnological techniques, Hydrometallurgy, 34, 383–395.
• KONDOS, P.D., DESCHENES, G., MORRISON, R.M., 1995. Process optimisation studies in gold cyanidation, Hydrometallurgy, 39, 235–250.
• LA BROOY, S.R., LINGE, H.G., WALKER, G.S., 1994. Review of gold extraction from ores, Minerals Engineering, 7 (10), 1213–1241.
• LI, Q., LI, D., QIAN, F., 2009. Pre-oxidation of high-sulfur and high-arsenic refractory gold concentrate by ozone and ferric ions in acidic media, Hydrometallurgy, 97, 61–66.
• LIA, J., DABROWSKI, B., MILLER, J. D., ACAR, S., DIETRICH, M., LEVIER, K. M., WAN, R. Y., 2006. The influence of pyrite pre-oxidation on gold recovery by cyanidation, Minerals Engineering, 19, 883–895.
• MARSDEN, J.O., HOUSE, C.L., 2006. The chemistry of gold extraction, Society for Mining Metallurgy and Exploration, p. 651.
• RAJALA, J., DESCHENES, G., 2009. Extraction of gold and silver at The Kupol Mill using CELP, The World Gold Conference, The Southern African Institute of Mining and Metallurgy, 35–42.
• ROSHAN, B.B., 1990. Hydrometallurgical processing of precious metal ores, Mineral Processing and Extractive Metallurgy Review, 6, 67–80.
• SCERESINI, B., 2005. Gold-copper ores (Chapter 32), Advances in Gold Ore Processing, Adams A.D. (ed.), Developments in Mineral Processing, Vol 15, Elsevier, Amsterdam, The Netherlands, 789–824.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).