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leaching galena chloride

The leaching of galena in cupric chloride media

The leaching rate is in-dependent of CuCl 2 concentrations >0.1 M but increases with increasing concentrations of either HC1 or NaCl. The leaching rate decreases with the accumulation of either the PbCl 2 or CuCl reaction product in the leaching medium but is insensitive to the disk rotation speed.

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Electrogenerative leaching of galena with ferric

2003-9-1  Electrogenerative leaching is a new research field in hydrometallurgy. In the present paper, various factors affecting the electrogenerative leaching of galena with ferric chloride have been studied. It was obvious that the low resistance ion membrane and high active electrode of sulfide are of most important in the leaching.

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Kinetics of galena leaching in hydrochloric acid

This article presents a series of studies on the nonoxidative leaching of galena with hydrochloric acid in the presence of a metallic chloride. A systematic study was carried out using a succession of metallic chlorides with cations of different valencies in an attempt to generalize the leaching

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The leaching of galena in cupric chloride media

The kinetics of dissolution of galena (PbS) in CuCl2-HCl-NaCl media have been investigated using the rotating disk technique. Rapid nonlinear kinetics are observed over the temperature range 45 °C to 90 °C and for NaCl concentrations from 0 to 4.0 M. The leaching rate is in-dependent of CuCl2 concentrations >0.1 M but increases with increasing concentrations of either HC1 or NaCl.

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Ferric Chloride Brine Leaching of Galena Lead

2021-1-2  Proposed Process for Recovery of Metal Values from Galena Concentrate The aforementioned tests indicated that, for optimum results, the concentrate should be ground to 90 pct minus 325 mesh and leached with the theoretical amount of FeCl3 at

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The leaching of galena in cupric chloride media

In fact, two major pilot-scale campaigns t2,31have been carried out on the ferric chloride leaching of lead concentrates, and a significant amount of fundamental research has been done on the relevant kinetics of reaction of galena with ferric chloride solutions.

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Kinetics of galena leaching in hydrochloric acid

1990-2-1  This article presents a series of studies on the nonoxidative leaching of galena with hydrochloric acid in the presence of a metallic chloride. A systematic study was carried out using a succession of metallic chlorides with cations of different valencies in an attempt to generalize the leaching behavior of these solutions.

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Leaching kinetics of lead from galena with acidified ...

2018-6-8  The leaching of lead from galena in acidic hydrogen peroxide in presence of sodium chloride solution has been investigated with respect to the effects of hydrochloric acid and hydrogen peroxide concentrations, by changing the stirring speed, leaching temperature and the particle size.

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Kinetics of Leaching Galena Concentrates with Ferric ...

2020-8-12  Figure 23. Leaching of lead from galena concentrate at various initial Pb2 concentrations and 45°C, 300m1 lixiviant(Fe3=35.3 g/l, free H2SiF6=32.9gil) 77 Figure 24. Leaching of zinc from galena concentrate at various initial Pb2 concentrations and 45°C 78 Figure 25. Leaching of lead from galena concentrate for various pulp densities at 65°C ...

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Leaching kinetics of lead from galena with acidified ...

2018-6-8  (2015). Leaching kinetics of lead from galena with acidified hydrogen peroxide and sodium chloride solution. Mineral Processing and Extractive Metallurgy: Vol. 124, No. 3, pp. 137-142.

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The leaching of galena in cupric chloride media

The kinetics of dissolution of galena (PbS) in CuCl2-HCl-NaCl media have been investigated using the rotating disk technique. Rapid nonlinear kinetics are observed over the temperature range 45 °C to 90 °C and for NaCl concentrations from 0 to 4.0 M. The leaching rate is in-dependent of CuCl2 concentrations >0.1 M but increases with increasing concentrations of either HC1 or NaCl.

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Frontiers Bioleaching of Indonesian Galena

2020-10-8  Dutrizac, J. E., and Chen, T. T. (1990). The effect of the elemental sulfur reaction product on the leaching of galena in ferric chloride media. MTB 21, 935–943. doi: 10.1007/BF02670264. CrossRef Full Text Google Scholar

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Representation of the Kinetics of Leaching of Galena

Galena (PbS) is leached by a solution concentrated in NaCl and containing ferrous and ferric chloride. The ferric ion concentration is kept constant by adding KMnO4 or the potential is kept constant by adding a concentrated ferric chloride solution. The ferrous concentration of the solution has no effect upon the kinetics, the temperature and the chloride concentration have only a weak effect ...

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Direct Leaching of Lead from Galena Using Acetic

Investigations on the kinetics of leaching lead from galena (PbS), using acetic acid (HAc) solutions in iron(III) chloride (FeCl 3) solutions, were conducted using shrinking core models.The effects of operational parameters, such as temperature, acetic acid iron(III) chloride concentration, and galena particle size, on the leaching process were also studied.

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Ferric Chloride Brine Leaching of Galena Lead

2021-1-2  The objective of the present investigation was to optimize the method developed for treating galena concentrate that would produce lead by FeCl3 leaching and fused-salt electrolysis and would minimize sulfur oxide and lead emissions.

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The leaching of sulphide minerals in chloride media ...

1992-6-1  LEACHING SULPHIDE MINERALS IN CHLORIDE MEDIA 21 CHLORIDE LEACHING PROCESSES FOR LEAD CONCENTRATES Galena (PbS) is the only lead sulphide mineral of any commercial signifi- cance. Galena concentrates are readily processed by pyrometallurgical meth- ods, but problems persist with fugitive SO2 emissions from some operations, and all plants are ...

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Leaching kinetics of lead from galena with acidified ...

2018-6-8  The leaching of lead from galena in acidic hydrogen peroxide in presence of sodium chloride solution has been investigated with respect to the effects of hydrochloric acid and hydrogen peroxide concentrations, by changing the stirring speed, leaching temperature and the particle size.

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Ferric Chloride Leaching - 911 Metallurgist

2018-10-15  Ferric chloride leaching of galena was investigated by Christiansen in 1923, later by Agracheva and recently by Cottam, Baker, Milner , and Demarthe. Molten-salt electrolysis of lead chloride was reported by Ashcroft in 1925 and later by Starliper. An

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How to Dissolve Galena - 911metallurgist

2018-8-24  The effect of concentration of ferric chloride on the leaching of galena is pronounced up to about 0.2 mol/liter which is probably due to the increase of diffusivity with FeCl3 concentration. Above 0.2 M FeCl3, no increase in rate is observed at 50° and 90°C. The effect of NaCl on leaching rate of galena

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The leaching of sulphide minerals in chloride media ...

Although the chloride leaching of chalcopyrite concentrates has been proven at the demonstration plant scale, the leaching reaction is difficult. In contrast, galena dissolves rapidly in FeCl 3 media, and both the leaching rate and lead solubility increase significantly with increasing chloride concentration. The hydrometallurgical treatment of ...

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Frontiers Bioleaching of Indonesian Galena

2020-10-8  Dutrizac, J. E., and Chen, T. T. (1990). The effect of the elemental sulfur reaction product on the leaching of galena in ferric chloride media. MTB 21, 935–943. doi: 10.1007/BF02670264. CrossRef Full Text Google Scholar

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The Leaching Of Galena In Cupric Chloride Media -

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Representation of the Kinetics of Leaching of Galena

THEkinetics of leaching galena by ferric chloride solutions has recently been studied by several authors: Murray 1 (1972) had a disk of galena leached by a 0.5 tool/1 solution of ferric chloride. He found that the diffusion of the ferric ion through the sulfur layer is the limiting step of the kinetics.

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A Critical Review of the Ferric Chloride Leaching of

2018-6-1  Ferric chloride leaching is a potentially attractive method of processing lead concentrates, and many studies have been carried out on the kinetics of dissolution of galena (PbS). In this paper, th...

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Kinetics of Leaching Galena Concentrates with Ferric ...

2020-8-12  Figure 23. Leaching of lead from galena concentrate at various initial Pb2 concentrations and 45°C, 300m1 lixiviant(Fe3=35.3 g/l, free H2SiF6=32.9gil) 77 Figure 24. Leaching of zinc from galena concentrate at various initial Pb2 concentrations and 45°C 78 Figure 25. Leaching of lead from galena concentrate for various pulp densities at 65°C ...

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A Study on Kinetics of Leaching of Sichuan’s Galena in ...

The kinetics of leaching of Sichuan’s galena in ferric chloride has been investigated in the study.Its aim is to investigate these facts:concentration of ferric chloride and sodium chloride,temperature and particle size,the influence on the kinetics.The results of the ...

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Determination of leaching conditions of galena

View Determination of leaching conditions of galena concentrate in acid medium with chloride ions.pdf from CHEMISTY chem at Curtin University. See discussions, stats, and author profiles for this

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Mechanisms of Surface Passivation during Galena

2020-9-28  Organic solutions are promising lixiviants for fast and environmentally sustainable Pb extraction from ore minerals at low temperatures. However, engineering of novel leaching flowsheets has been hindered by poor understanding of the leaching mechanism, particularly the formation of surface-passivating phases. Here, we studied leaching of galena (PbS), the most abundant Pb ore mineral, in ...

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Hydrometallurgical Processing of a Nigerian Galena Ore

2018-6-5  Warren et al. [14] investigated the effect of chloride ion on the ferric chloride leaching of galena concentrate, using galena obtained from Alabama, Tuscaloo-sa. 0.2 M FeCl 3 was used in the presence of 4 M NaCl and 0.1 M HCl. The tem-perature range used was 27˚C - 57˚C. The activation energy was estimated to be

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Chloride leaching of silver and lead from a solid residue ...

2017-4-19  After that galena is further converted to PbSO 4 (Fig. 4) and the content of PbS remarkably decreases in the leached solid (Table 3). Fig. 2. Galena grain before leaching Fig. 3. Galena grain leached partially Fig. 4. Galena grain after atmospheric leaching The dominating copper mineral identified in the feed for chloride leaching was

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