EFFECT OF SODIUM CHLORIDE DOSAGE ON THE ROASTING AND HYDROCHLORIC ACID LEACHING OF LEAD CAKE FROM ZINC PRODUCTION
DOI:
https://doi.org/10.5281/zenodo.23402663Abstract
This study investigates the processing of lead cake generated at the Zinc Plant of the Almalyk Mining and Metallurgical Complex (AMMC), Uzbekistan, using sodium chloride roasting followed by hydrochloric acid leaching. The research aims to evaluate the influence of sodium chloride dosage on the processing of lead-bearing metallurgical residues and the potential recovery of valuable components. Laboratory experiments were conducted using lead cake-to- NaCl mass ratios of 1:0.5, 1:1, 1:2, and 1:3. The samples were roasted at 550°C for 1.5 hours, followed by leaching with hydrochloric acid solution and precipitation using sodium carbonate. Experimental results demonstrated variations in the masses of roasted products, leaching residues, and dried precipitates depending on the reagent ratio. The highest dried precipitate mass of 130 g was obtained at a ratio of 1:3, while the lowest mass of 43 g was recorded at 1:1. These findings indicate that sodium chloride dosage influences the distribution of products during lead cake processing. However, further chemical and mineralogical analyses are necessary to determine individual metal recovery efficiencies and product purity. The study provides preliminary experimental evidence supporting the development and optimization of technologies for processing lead-bearing industrial residues and improving the utilization of secondary metallurgical resources.Keywords
lead cake, sodium chloride roasting, hydrochloric acid leaching, hydrometallurgy, metal recovery, sodium carbonate precipitation, metallurgical wasteReferences
1. Aparajith, B., Mohanty, D. B., & Gupta, M. L. (2011). Recovery of enriched lead–silver residue from silverrich concentrate of hydrometallurgical zinc smelter. Hydrometallurgy, 109(3–4), 228–234. https://doi.org/10.1016/j. hydromet.2010.08.010
2. Farahmand, F., Moradkhani, D., Safarzadeh, M. S., & Rashchi, F. (2009). Brine leaching of lead-bearing zinc plant residues: Process optimization using orthogonal array design methodology. Hydrometallurgy, 95(3–4), 316–324. https://doi. org/10.1016/j.hydromet.2008.07.012
3. Haghighi, H. K., Hoseinian, F. S., & Sastre, A. M. (2024). A new feasible opportunity for recycling lead and silver from zinc plant residues by flotation. Materials, 17(21), Article 5218. https://doi.org/10.3390/ma17215218 3 Source: Author’s elaboration 304 10/2026
4. Höber, L., & Steinlechner, S. (2021). A comprehensive review of processing strategies for iron precipitation residues from zinc hydrometallurgy. Cleaner Engineering and Technology, 4, Article 100214. https://doi.org/10.1016/j. clet.2021.100214
5. Jiménez-Lugos, C., Flores-Favela, M., Romero-Serrano, A., Hernández-Ramírez, A., Cruz-Ramírez, A., Sanchez- Vite, E., Ortiz-Landeros, J., & Colin-García, E. (2025). Pyrometallurgical process to recover lead and silver from zinc leaching residue. Recycling, 10(5), Article 167. https://doi.org/10.3390/recycling10050167
6. Liu, F., Wang, J., Peng, C., Liu, Z., Wilson, B. P., & Lundström, M. (2019). Recovery and separation of silver and mercury from hazardous zinc refinery residues produced by zinc oxygen pressure leaching. Hydrometallurgy, 185, 38–45.
7. Lucheva, B., Iliev, P., & Kazakova, N. (2026). Combined process of chlorination roasting and acid leaching of lead and silver from lead cake. Materials, 19(1), Article 170. https://doi.org/10.3390/ma19010170
8. Onghena, B., & Binnemans, K. (2019). Recovery of lead and silver from zinc leaching residue using methanesulfonic acid. ACS Sustainable Chemistry & Engineering, 7(24), 19807–19815. https://doi.org/10.1021/acssuschemeng.9b05116
9. Raghavan, R., Mohanan, P. K., & Patnaik, S. C. (1998). Innovative processing technique to produce zinc concentrate from zinc leach residue with simultaneous recovery of lead and silver. Hydrometallurgy, 48(2), 225–237. https://doi. org/10.1016/S0304-386X(97)00082-0
10. Raghavan, R., Mohanan, P. K., & Swarnkar, S. R. (2000). Hydrometallurgical processing of lead-bearing materials for the recovery of lead and silver as lead concentrate and lead metal. Hydrometallurgy, 58(2), 103–116. https://doi. org/10.1016/S0304-386X(00)00108-0
11. Rashchi, F., Dashti, A., Arabpour-Yazdi, M., & Abdizadeh, H. (2005). Anglesite flotation: A study for lead recovery from zinc leach residue. Minerals Engineering, 18(2), 205–212. https://doi.org/10.1016/j.mineng.2004.10.014
12. Turan, M. D., Altundoğan, H. S., & Tümen, F. (2004). Recovery of zinc and lead from zinc plant residue. Hydrometallurgy, 75(1–4), 169–176. https://doi.org/10.1016/j.hydromet.2004.07.008
13. Wang, R., Yang, Y., Liu, C., Zhou, J., Fang, Z., Yan, K., Tian, L., & Xu, Z. (2020). Recovery of lead and silver from zinc acid-leaching residue via a sulfation roasting and oxygen-rich chlorination leaching method. Journal of Central South University, 27(12), 3567–3580. https://doi.org/10.1007/s11771-020-4569-6
14. Zhang, Y., Yu, X., & Li, X. (2012). Kinetics of simultaneous leaching of Ag and Pb from hydrometallurgical zinc residues by chloride. Rare Metals, 31, 402–409. https://doi.org/10.1007/s12598-012-0528-1
15. Qiang, L., Cun-xiong, L., Zhi-hui, G., Chang-wen, L., & Qi-liang, W. (2024). Study on pre-oxidation of silver concentrate and leaching behaviour of Zn, Cu and In during oxygen-pressure leaching. Hydrometallurgy, 228, Article 106358. https://doi.org/10.1016/j.hydromet.2024.106358
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