Recovery of lead and silver from zinc acid-leaching residue via a sulfation roasting and oxygen-rich chlorination leaching method

Abstract

A large amount of acid-leaching residue is produced during the conventional Zn hydrometallurgy process, and this residue has a large concentration of a variety of valuable metals. The purpose of this study was to evaluate the ability of a procedure that entails the use of sulfation roasting, water leaching, and chlorination leaching (blowing oxygen technique) to recover Pb and Ag, followed by cooling crystallization and the replacement of Ag with lead sheet, to realize the full recovery of all valuable metals from zinc acid-leaching residue; consequently, good results were achieved. The best results were obtained under the following conditions: a sulfuric acid at 70% of the raw material quality, roasting temperature of 300 °C and roasting time of 2 h, followed by the process of leaching the roasted residue for 1 h by applying a water-to-solid ratio of 5:1 at room temperature. The recovery rates of Zn and Fe were 98.69% and 92.36%, respectively. The main parameters of the chlorine salt leaching system were as follows: Cl⁻ concentration of 300 g/L, Fe³⁺ concentration of 25 g/L, acid concentration of 2 mol/L, liquid-to-solid ratio of 9 mL:1 g, temperature of 90 °C, and leaching time of 0.5 h; this leaching process was followed by filtration separation. These conditions resulted in high extents of leaching for Pb and Ag (i.e., 98.87% and 96.74%, respectively). Finally, the kinetics of the process of Ag leaching using Cl⁻ ions in an oxygen-rich medium was investigated. It was found that the leaching process was controlled by the diffusion of the product layers, and the activation energy was 19.82 kJ/mol.

Keywords

acid-leaching residue / sulfation roasting / chlorine salt / Pb, Ag / kinetics

References

[1] DutrizacJ E, DinardoO. The co-precipitation of copper and zinc with lead jarosite [J]. Hydrometallurgy, 1983, 11(1): 61-78

[2] LuoW, FengQ, OuL, ZhangG, ChenY. Kinetics of saprolitic laterite leaching by sulphuric acid at atmospheric pressure [J]. Minerals Engineering, 2010, 23(6): 458-462

[3] LiC-c, XieF-c, MaY, CaiT-t, LiH-y, HuangZ-y, YuanG-qing. Multiple heavy metals extraction and recovery from hazardous electroplating sludge waste via ultrasonically enhanced two-stage acid leaching [J]. Journal of Hazardous Materials, 2010, 178(1–3): 823-833

[4] NagibS, InoueK. Recovery of lead and zinc from fly ash generated from municipal incineration plants by means of acid and/or alkaline leaching [J]. Hydrometallurgy, 2000, 56(3): 269-292

[5] ZverdA, ErdemM. Environmental risk assessment and stabilization/solidification of zinc extraction residue: I. Environmental risk assessment [J]. Hydrometallurgy, 2010, 100(3–4): 103-109

[6] TuranM D, AltundoganH S, TumenF. Recovery of zinc and lead from zinc plant residue [J]. Hydrometallurgy, 2004, 75(1): 169-176

[7] SteerJ M, GriffithsA J. Investigation of carboxylic acids and non-aqueous solvents for the selective leaching of zinc from blast furnace dust slurry [J]. Hydrometallurgy, 20133441

[8] RuşenA, SunkarA S, TopkayaY A. Zinc and lead extraction from Çinkur leach residues by using hydrometallurgical method [J]. Hydrometallurgy, 2008, 93(12): 45-50

[9] ZhangY-h, JinB-j, SongQ-h, ChenB-m, WangC-yan. Leaching behavior of lead and silver from lead sulfate hazardous residues in NaCl-CaCl₂-NaClO₃ media [J]. JOM, 2019, 71(7): 2388-2395

[10] AparajithB, MohantyD B, GuptaM L. Recovery of enriched lead-silver residue from silver-rich concentrate of hydrometallurgical zinc smelter [J]. Hydrometallurgy, 2010, 105(12): 127-133

[11] ZhengY-x, LvJ-f, LiuW, QinW-q, WenS-ming. An innovative technology for recovery of zinc, lead and silver from zinc leaching residue [J]. Physicochemical Problems of Mineral Processing, 2016, 52(2): 943-954

[12] XingP, MaB-z, ZengP, WangC-y, WangL, ZhangY-l, ChenY-q, WangS, WangQ-yin. Deep cleaning of a metallurgical zinc leaching residue and recovery of valuable metals [J]. International Journal of Minerals, Metallurgy, and Materials, 2017, 24(11): 1217-1227

[13] BehnajadyB, MoghaddamJ. Optimization of lead and silver extraction from zinc plant residues in the presence of calcium hypochlorite using statistical design of experiments [J]. Metallurgical and Materials Transactions B, 2014, 45(6): 2018-2026

[14] RodriguezN, OnghenaB, BinnemansK. Recovery of lead and silver from zinc leaching residue using methanesulfonic acid [J]. ACS Sustainable Chemistry & Engineering, 2019, 7(24): 19807-19815

[15] JiangG-m, PengB, LiangY-j, ChaiL-y, WangQ-w, LiQ-z, HuMing. Recovery of valuable metals from zinc leaching residue by sulfate roasting and water leaching [J]. Transactions of Nonferrous Metals Society of China, 2017, 27(5): 1180-1187

[16] HanH-s, SunW, HuY-h, JiaB-l, TangH-hu. Anglesite and silver recovery from jarosite residues through roasting and sulfidization-flotation in zinc hydrometallurgy [J]. Journal of Hazardous Materials, 2014, 278: 49-54

[17] NadirovR K. Recovery of valuable metals from copper smelter slag by sulfation roasting [J]. Transactions of the Indian Institute of Metals, 2018, 72(3): 603-607

[18] LiuW F, YangT Z, XiaX. Behavior of silver and lead in selective chlorination leaching process of gold-antimony alloy [J]. Transactions of Nonferrous Metals Society of China, 2010, 20(2): 322-329

[19] ZhangY-l, YuX-j, LiX-bin. Leaching of silver and lead by chloride simultaneously from residue after zinc extraction of low-grade zinc oxide ores [J]. The Chinese Journal of Nonferrous Metals, 2012, 22(1): 296-303

[20] WangR-x, TangM-t, YangS-h, ZhagnW-h, TangC-b, HeJ, YangJ-guang. Leaching kinetics of low grade zinc oxide ore in NH₃-NH₄Cl-H₂O system [J]. Journal of Central South University of Technology, 2008, 15(5): 679-683

[21] JuS-h, TangM-t, YangS-h, LiY-nian. Dissolution kinetics of smithsonite ore in ammonium chloride solution [J]. Hydrometallurgy, 2005, 80(1): 67-74

[22] LiuJ-n, ZhaiY-c, WuY, ZhangJ, ShenX-yi. Kinetics of roasting potash feldspar in presence of sodium carbonate [J]. Journal of Central South University, 2017, 24(7): 1544-1550

[23] WangH-d, ZhouA-a, GuoH, LüM-h, YuH-zhao. Kinetics of leaching lithium from lepidolite using mixture of hydrofluoric and sulfuric acid [J]. Journal of Central South University, 2020, 27(1): 27-36

[24] GuoY-dongComplex gold ore roasting-acid leaching-fluoride salt pretreatment-cyanidaton process[D], 2019, Ganzhou, Jiangxi University of Science and Technology, 4243

[25] YangH-b, PanX-l, YuH-y, TuG-f, SunJ-min. Effect of ferrite content on dissolution kinetics of gibbsitic bauxite under atmospheric pressure in NaOH solution [J]. Journal of Central South University, 2017, 24(3): 489-495