leaching galena chloride


Leaching kinetics of lead from galena ... - Taylor & Francis

AbstractThe 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.

The effect of chloride ion on the ferric chloride leaching ...

Abstract Previous investigations of the ferric chloride brine leaching of galena concentrate have shown that additions of chloride …

PLEASE DO NOT REMOVE FROM LIBRARY iRII9055

PLEASE DO NOT REMOVE FROM LIBRARY iRII9055 Bureau of Mines Report of Investigations/1986 Hydrometallurgical Process for Producing Lead and Elemental Sulfur From Galena

Recovery of Silver, Gold, and Lead From a Complex …

A ferric chloride (FeCI3 ) preleach, at 40° C in 6 h, extracted about 50 pct of the zinc and formed insoluble silver and lead chlorides. Subsequent acid thiourea leaching, for 1 to 3 h at 40° C, extracted

Kinetics of leaching galena concentrates with ferric ...

Early investigations on the ferricchloride leaching of galena were reported by Russian researchers.Vasilve and Muratova[20] investigated the reaction between galena andacidified ferric chloride solutions and found that galena dissolved in FeC13solutionaccording to the following reaction:PbS + 2FeC13 = PbC12 + 2FeC1 + …

US4181588A - Method of recovering lead through the …

Leaching of the galena concentrate in tank 1 is achieved at a temperature of approximately 95°-100° C., thereby producing a first slurry which comprises ferrous chloride (FeCl 2), lead chloride and sodium chloride in solution, with free sulfur and gangue in suspension. This first slurry is directed to a filter 5 which separates the …

Ferric sulphate/chloride leaching of zinc and minor ...

However, leaching stage with a 0.5 M H2SO4 and Fe2(SO4)3 solution allowed the application of two cross-current leaching stages allows obtain- to leach 60% of the zinc and 10% of the copper contained in the con- ing around 90% of zinc extraction using a solid/liquid ratio of 10% centrate, whereas a second leaching stage in chloride …

Chlorine Oxygen Leaching Process

Lead was recovered from the leaching residue by hot brine leaching-crystallization and fused-salt electrolysis of the lead chloride. The Bureau of Mines has conducted considerable research on recovery of lead from galena concentrates. Since the residue produced in the PDU was similar to residue previously investigated, only 300 lb of …

The leaching of galena in cupric chloride media

The Leaching of Galena in Cupric Chloride Media J.E. DUTRIZAC The kinetics of dissolution of galena (PbS) in CuC12-HC1-NaC1 media have been investigated

Leaching kinetics of lead from galena with acidified ...

AbstractThe 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.

The kinetics of leaching galena concentrates with ferric ...

The kinetics of leaching galena concentrates with ferric methanesulfonate solution. ... galena concentrates with ferric methanesulfonate ... chloride leaching of galena.

Leaching helps to recover metals from complex ores

leaching helps to recover metals from complex It is difficult to process mixed-metal sulfide ores by flotation and smelting, so several nations, including the U.S., Canada and Australia, aie developing leaching routes.

Ferric Chloride-brine Leaching of Galena Concentrate.

Primary lead is produced in the United States by the pyrometallurgical smelting of lead sulfide (galena, pbs) concentrates, which poses sulfur dioxide and lead air pollution control problems.

Process Development - pubs.dggsalaskagov.us

the chloride leaching steps and gold from flotation products during the cyanide leaching. Preliminary economic and technical Preliminary economic and technical evaluation is presented.

Chlorine Leaching of Lead Zinc Flotation Concentrates

The first category refers to a process in which the chlorine is supplied indirectly through hydrogen chloride or a salt such as ferric or cupric chloride while the second category refers to a process in which chlorine is supplied directly as chlorine gas.

The kinetics of leaching galena concentrates ... - …

Read "The kinetics of leaching galena concentrates with ferric methanesulfonate solution, Hydrometallurgy" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

Technical Note Electrogenerative leaching of …

Technical Note Electrogenerative leaching of galena with ferric chloride S. Wang *, Z. Fang, Y. Wang, Y. Chen College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China

Kinetics of galena leaching in hydrochloric acid …

Kinetics of Galena Leaching in Hydrochloric Acid-Chloride Solutions C. NI~I/qEZ, F. ESPIELL, and J. GARdA-ZAYAS This article presents a series of studies on the nonoxidative leaching of galena with hydrochloric

Predictive Analysis of Dissolved Lead Based on …

chlorination of ferrous chloride leaching by-products, and it has greater potential for the treatment of complex sulfides. The aim of the present work is to carry out a predictive analysis of dissolved lead based on leaching time and reaction temperature during hydro-processing of galena in the ferric nitrate solution. 3. Materials and methods The galena …

lead galena recovery - erfgoedkamerbertem.be

Lead chloride is obtained by leaching lead ... the choice between preparation of … THE CHOICE BETWEEN PREPARATION OF ELEMENTAL LEAD OR LEAD POWDER FROM GALENA CONCENTRATES FROM FYROM MINES Aleksandar Krstev, Boris Krstev, Mirjana Golomeova, Blagoj ...

Dissolution Characteristics of Galena in Aqueous …

Dissolution Characteristics of Galena in Aqueous Ferric Nitrate Lixiviant . C. N. Mbah . Department of Metallurgical and Materials Engineering, Enugu State

FERRIC CHLORIDE-BRINE LEACHING OF GALENA CONCENTRATE.

The Bureau of Mines has investigated an alternative hydrometallurgy procedure that does not generate gaseous sulfur oxides and diminishes the potential for the escape of lead into the atmosphere. The procedure involves leaching galena flotation concentrates with ferric chloride (FeCl//3) solution to ...

Response Evaluation of Leached out Lead Based on …

ferrous chloride leaching by-products, and it has . ... galena during leaching in Ferric sulphate solution. II. MATERIALS AND METHODS (The galena samples used in this study were collected from the deposit, at Enyimgba, Abakaliki, Ebonyi State. The galena which was in association with other minerals (valuable and gangue) was obtained in …

Recovering Lead Metal from Lak Mine Lead …

Several galena leaching processes have been investigated, including processes using ferric chloride [5], ferric sulfate [6], and nitric acid [7]. Chloride leaching, among other processing techniques, is the most recognized and widely used recovery method. Chloride leaching processes have been employed using either NaCl or MgCl 2, and …

FERRIC CHLORIDE OF THE DELTA SULFIDE - …

A hydrometallurgical test involving ferric chloride leaching of galena concentrates, purification of the resulting solution and direct electrolysis of thepud3ed leadchloride solution was performed in the Minemet

Kinetics of Leaching Galena Concentrates With Ferric ...

The addition of soluble metallic chloride to a HC1 solution only increases the leaching rate of the galena by augmenting the mean ionic activity of the acid. the enhancement of the dissolution rate observable at high sodium chloride concentration may be due to the specific adsorption of chloride ions or the surface complexing of chloride ions ...

CHLORIDE HYPOCHLORITE OXIDATION AND …

Chloride–hypochlorite oxidation and leaching of refractory sulfide gold concentrate 63 Fig. 1. The Pourbaix diagram of Fe–S at [Fe] –= 10 4 M, [S] = 10– M and 25 C (the chlorine species regions are also marked) (Marsden and House, 2005) Fig. 2.

Electrogenerative leaching of galena with ferric chloride ...

1.. IntroductionIn most hydrometallurgical leaching processes, such as oxidation leaching of sulfide, the chemical energy released as heat cannot be fully utilized.

The effect of chloride ion on the ferric chloride …

The Effect of Chloride Ion on the Ferric Chloride Leaching of Galena Concentrate G.W. WARREN, SEON-HYO KIM, and H. HENEIN Previous investigations of the ferric chloride brine leaching of galena concentrate have shown that

The effect of the elemental sulfur reaction product …

The Effect of the Elemental Sulfur Reaction Product on the Leaching of Galena in Ferric Chloride Media J.E. DUTRIZAC and T.T. CHEN

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