Preparation of lead sulfate powder directly from galena concentrates

Qin, Wenqing; Liu, Hui; Tang, Shuang-hua; Sun, Wei

doi:10.1016/s1003-6326(08)60299-x

Cited by 14 publications

(4 citation statements)

References 13 publications

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“…Lead is an important industry material, which is widely used in electrical, mechanical, chemical, metallurgy, pharmaceutical, military, and other fields [1]. Naturally, lead resources are divided into lead oxide ore and lead sulfide ore. Lead sulfide ore, especially galena, is the main raw material for lead production, because of its good natural floatability [2][3][4]. However, with the increasing consumption of lead metal, the resources of lead sulfide cannot meet the continuing high demand, so the exploitation and utilization of lead oxide ore is imperative.…”

Section: Introductionmentioning

confidence: 99%

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A Case Study of Enhanced Sulfidization Flotation of Lead Oxide Ore: Influence of Depressants

et al. 2020

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The refractory lead oxide ore has become an important source of lead metal with the continuous depletion of lead sulfide minerals. Lead oxide ore is of poor floatability and there are few cases to concentrate it successfully. In this study, the sulfidization-xanthate flotation method is applied for the beneficiation of lead oxide ore in Yunnan Province (China) with sodium hexametaphosphate and carboxymethyl cellulose as depressant. Chemical analysis and phase analysis was performed to explore the physicochemical property of raw ore, which provides a research basis for process design and operational control. The main influencing factors during the process, including grinding fineness, reagent types, and dosage, etc., have been studied through flotation tests. Zeta potential measurements and Fourier transfer-infrared spectrometry (FTIR) analysis were conducted to reveal the function mechanism of the reagents. Based on the determined experimental conditions, open circuit tests and closed circuit tests with one stage rougher, three-stage scavenger, and two-stage cleaner flotation, were carried out with the run-of-mine ore with a lead grade of 4.57%. Through close circuit bench test, the lead concentrate with a lead grade of 64.08% and recovery of 92.30% was obtained. This study is of special value, as it provides referencing significance for economically exploiting lead oxide ore.

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Section: Introductionmentioning

confidence: 99%

“…Stable complexes [(RO)2CSS]2Pb and [(RO)2PSS]2Pb form on mineral surface through ionic bonding, thus enhancing the hydrophobicity of mineral surfaces. The chemical reactions that may occur on the mineral surface are as following in Equations(1)and(2) [26,27].…”

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confidence: 99%

A Case Study of Enhanced Sulfidization Flotation of Lead Oxide Ore: Influence of Depressants

et al. 2020

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“…Hydrometallurgical routes of leaching lead concentrates have been developed progressively by testing a number of solvents to overcome such problems ( Greet and Smart, 2002 ; Aydoğan et al, 2007 ; Long et al, 2009 ; Wu et al, 2014 ). However, the chemical solvents used are reported to have a very low solubility of lead, a high corrosiveness, and very high toxicity, and a significantly high temperature (65–85°C) is required to achieve a high lead recovery as listed in Table 1 ( Warren et al, 1987 ; Pashkov et al, 2002 ; Aydoğan et al, 2007 ; Qin et al, 2009 ; Zárate-Gutiérrez et al, 2010 , 2015 ; Baba and Adekola, 2013 ; Wu et al, 2014 ; Anugrah et al, 2017 ; Allen and Igboayaka, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Bioleaching of Indonesian Galena Concentrate With an Iron- and Sulfur-Oxidizing Mixotrophic Bacterium at Room Temperature

2020

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Biohydrometallurgy is believed to be a promising future study field for the recovery of lead (Pb) from ores/concentrates since the pyrometallurgical/hydrometallurgical processes have been largely applied to recover Pb to date, which operates at high temperature and generates volatile Pb matters that are hazardous and carcinogenic to human health. Hence, the main purpose of this study was to investigate the biohydrometallurgical extraction of Pb from the Indonesian galena concentrate through bioleaching using an iron- and sulfur-oxidizing mixotrophic bacterium (identified as Citrobacter sp.). The bioleaching experiments were conducted in shake flasks containing the modified LB broth medium supplemented with galena concentrate with a particle size of d 80 = 75 μm at room temperature. Both semi-direct and direct bioleaching methods were employed in this study. The bacterium was able to extract lead (Pb) from galena concentrate with high selectivity to Cu and Zn (0.99 and 0.86, respectively). The highest extraction level of 90 g lead dissolved/kg galena concentrate was achieved using direct bioleaching method at bioleaching conditions of 2% w/v pulp density, 5 g/L FeCl 3 , 50 g/L NaCl, 20 g/L molasses and a rotation speed of 180 rpm at room temperature (25°C). The addition of FeCl 3 , NaCl, and molasses increased the lead leaching efficiencies, which were also evidenced by the FTIR, XRD, and SEM-EDS analyses. From industrial and commercial standpoints, the selective bioleaching represented in this study may be beneficial to the development of lead leaching from sulfide minerals, since insoluble anglesite (PbSO 4 ) precipitates are formed during ferric sulfate oxidation, thus making the recovery of lead through bioleaching unpractical.

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“…Under the world situation of advocating energy saving, emission reduction and environmental protection, many researchers pay more attention to the preparation of metal materials by electrochemical methods. [7][8][9] In recent years, the "FFC Cambridge process" has proposed a new electrochemical route for the direct reduction of solid metal compounds to metals or alloys in high temperature molten salts. 10,11 Although this method can not only obtain metals or alloys with a low impurity content, but also effectively shorten the technological process.…”

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confidence: 99%

Eco-Friendly Extraction of Lead from Galena by In Situ Electrochemical Reduction in ChCl-EG Deep Eutectic Solvent

Zhang

et al. 2021

J. Electrochem. Soc.

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One-step electrochemical extraction of metallic lead from solid galena in choline chloride-ethylene glycol deep eutectic solvent (ChCl-EG DES) was studied for the first time. Cyclic voltammetry on a Pt powder microcavity electrode shows that solid galena can be directly reduced to metallic lead by a one-step, two-electron transfer reaction at a potential of −0.47 V (vs Ag). The constant voltage electrolysis using galena powders as cathode in the range of 5 h to 30 h reaction time and 3.0 V to 3.8 V cell voltage further proves that metallic lead can be obtained at the cathode. With the extension of reaction time, the morphology of lead powders transforms from interconnected wax to irregular rod-like and needle particles. As the cell voltage is elevated, the microstructure of metallic lead changes from irregular flake and rod to nano-needle particles. The direct electrolysis process of solid galena is analyzed, and a schematic diagram is also exhibited. It is pointed out that the close contact between galena powders and current collector is the key to facilitate the in situ reduction. These findings put forward a green and convenient route for direct extraction of metals from sulphide ores at near room temperature.

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Preparation of lead sulfate powder directly from galena concentrates

Cited by 14 publications

References 13 publications

A Case Study of Enhanced Sulfidization Flotation of Lead Oxide Ore: Influence of Depressants

A Case Study of Enhanced Sulfidization Flotation of Lead Oxide Ore: Influence of Depressants

Bioleaching of Indonesian Galena Concentrate With an Iron- and Sulfur-Oxidizing Mixotrophic Bacterium at Room Temperature

Eco-Friendly Extraction of Lead from Galena by In Situ Electrochemical Reduction in ChCl-EG Deep Eutectic Solvent

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