Poducts

  • Leaching Galena Chloride jugendblasmusikfestival.de

    Leaching Galena Chloride. 2019-9-21the galena concentrate used in ferric chloride leaching was a concentrate from southeastern missourinalysis of the concentrate is shown in table 1he lead concentrate contained primarily galena and small amounts of chalcopyrite, sphalerite, marcasite, and siegenitehe gangue material contained a small concentration of dolomite.

  • Continuous Ferric Chloride Leaching of Galena |

    The US Bureau of Mines demonstrated ferric chloride leaching of galena concentrate on a continuous bench scale basis. Leaching was performed at 95°C (200°F) and with a contact time of 15 minutes. The ferric chloride leaching solution was continuously fed to a leaching tank at a constant rate for periods up to 45 hours. In each test, a constant redox potential was maintained in the slurry

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  • Electrogenerative leaching of galena with ferric chloride

    01.09.2003· The effects of ferric chloride concentration in the leaching are similar to the traditional leaching. The activation energy was determined to be 14.96 kJ mol −1 for FeCl 3 leaching of galena under the present conditions. Previous article in issue Next article in issue

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  • Kinetics of galena leaching in hydrochloric acid-chloride

    01.02.1990· The reaction order for leaching galena, in terms of the mean ionic activity of HCl, is 3/2 over a wide range of concentration. The addition of soluble chlorides to a HCl solution increases the leaching rate of the galena by augmenting the mean ionic activity of the acid.

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  • 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.

  • Cited by: 21
  • Electrogenerative leaching of galena with ferric chloride

    The effects of ferric chloride concentration in the leaching are similar to the traditional leaching. The activation energy was determined to be 14.96 kJmol−1 for FeCl3 leaching of galena under the...

  • Leaching kinetics of lead from galena with acidified

    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.

  • Cited by: 4
  • Leaching of galena by regenerated ferric ion (Fe 3+ ) via

    With galena leaching by regenerated Fe ³⁺, the effects of temperature, S/L ratio and leaching time have been investigated, and the leaching rate of 87.3% can be realized in just 12 minutes under...

  • Leaching kinetics of lead from galena with acidified

    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

  • The kinetics of leaching galena concentrates with ferric

    01.02.2014· The chemistry of galena leaching with ferric methanesulfonate is as follows. Elemental sulfur may be further oxidized to sulfate (SO 4− 2) which precipitates lead (Pb + 2) to form lead sulfate (PbSO 4) product. Reaction 1 2Fe (CH3SO3)3 + PbS → 2Fe (CH3SO3)2 + Pb (CH3SO3)2 + S0 Reaction 2S0 + 4H2O → SO4− 2 + 8H+ + 6e−

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  • Kinetics of galena leaching in hydrochloric acid-chloride

    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. The reaction order for leaching galena, in terms of the mean ionic

  • Pressure Leaching of Galena to Recover Lead by

    Table of ContentsPressure LeachingPurification of LeachatesLead ElectrowinningPressure LeachingOxygen PressureTemperatureCatalystsTimeFree H2SiF6Purification of

  • Kinetics of leaching galena concentrates with ferric

    The ferric fluosiicate leaching oflead has the potential to overcome the problems met in the ferric chloride leachingsystem.The purpose of this investigation was:(1) To investigate whether lead can be selectively recovered from galena concentratesby dissolution in an aqueous ferric fluosilicate solution.(2) To study the effect of time, stirring speed, temperature, concentration of Pb2,Fe3and

  • Kinetics of Leaching Galena Concentrates with Ferric

    During the course of the galena leaching, zinc extraction is much lower than lead extraction, especially at temperatures below 65°C. Separation of lead and zinc by selective leaching seems to be feasible and effective. Therefore, the ferric fluosilicate leaching system appears to have great potential to treat both conventional lead sulfide concentrates and complex sulfideconcentrates, such as

  • The effect of chloride ion on the ferric chloride leaching

    Previous investigations of the ferric chloride brine leaching of galena concentrate have shown that additions of chloride ion result in accelerated dissolution rates. The current study has provided the necessary information to extend and modify these previous results by incorporating the important effect of chloride ion on the dissolution kinetics.

  • leaching galena lead payforwork.nl

    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. The federal Bureau of Mines has investigated an alternative hydrometallurgy procedure that does not generate . Get Price. Kinetics of Galena Leaching

  • Chloride leaching of silver and lead from a solid residue

    Chloride leaching of silver and lead from a solid residue after atmospheric leaching 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 chalcopyrite with a small admixture of bornite and covellite. Pyrite and marcasite were also identified in the

  • Technical Note Dissolution of galena with acidified

    Experimental conditions for the leaching of lead from galena Quantity Values Temperature, oC 30, 35, 40*, 45, 50 Concentration of HOCl, % 10, 15, 20 33.8* Sodium chloride 3.0mol/l* Hydrochloric acid 2.0mol/l* Stirring speed,rpm 300*, 400, 500, 600 Particle size, μm 100, 150*, 200, 300 * The values kept constant The experimental conditions are summarised in Table 2. This involves varying one

  • Leaching of Primary Copper Sulfide Ore in Chloride-Ferrous

    In addition, numerous studies showed that leaching of chalcopyrite in chloride media results in higher copper extractions than in sulfate media [16,23,24]. The main reasons are the formation of chloride complexes, which change the electrochemical behavior of chalcopyrite passivation and/or the higher porosity of the mineral surface [8,16,25]. For example, Dutrizac [7] associated the high

  • US8070851B2 Chloride heap leaching Google Patents

    A heap leaching method to recover copper from a primary copper sulphide mineral wherein the mineral is leached in an acidic chloride/sulphate solution in the presence of oxygen with the surface potential of the mineral below 600 mV (vs. SHE) to cause dissolution of the copper sulphide.

  • Pressure Leaching of Galena to Recover Lead by

    Table of ContentsPressure LeachingPurification of LeachatesLead ElectrowinningPressure LeachingOxygen PressureTemperatureCatalystsTimeFree H2SiF6Purification of

  • Ferric Chloride-brine Leaching of Galena Concentrate

    Ferric Chloride-brine Leaching of Galena Concentrate Ebook written by Frank P. Haver, Morton Min Wong. Read this book using Google Play Books app on your PC, android, iOS devices. Download for offline reading, highlight, bookmark or take notes while you read Ferric Chloride-brine Leaching of Galena Concentrate.

  • Leaching Galena Methods

    Leaching Galena Methods. Cgw develops, manufactures and markets a full line of resinbonded abrasive cutoff wheels and grinding discs for use on wide range of materials metal, stone, concrete and more. Your demand. Contact Information. Zhengzhou High-tech Zone, China [email protected] Product Information. Cut Off Wheels And Grinding Discs Cgw. Cgw develops, manufactures and markets a full

  • Kinetics of leaching galena concentrates with ferric

    The ferric fluosiicate leaching oflead has the potential to overcome the problems met in the ferric chloride leachingsystem.The purpose of this investigation was:(1) To investigate whether lead can be selectively recovered from galena concentratesby dissolution in an aqueous ferric fluosilicate solution.(2) To study the effect of time, stirring speed, temperature, concentration of Pb2,Fe3and

  • Ferric chloride-brine leaching of galena concentrate

    Additional Physical Format: Online version: Haver, Frank P. Ferric chloride-brine leaching of galena concentrate (OCoLC)609298760: Material Type: Government

  • Chloride leaching of silver and lead from a solid residue

    Chloride leaching of silver and lead from a solid residue after atmospheric leaching 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 chalcopyrite with a small admixture of bornite and covellite. Pyrite and marcasite were also identified in the

  • Model for Predictive Analysis of the Concentration of

    chloride brine leaching of galena concentrate have been carried out. The results of the investigation reveal several advantages of ferric chloride over the reagents as a leaching media which includes that it exhibits substantially faster dissolution rates for most sulphides, it is regenerated easily by chlorination of ferrous chloride leaching by-products, and it has greater potential for the

  • Galena-pyrolusite co-extraction in sodium chloride

    Abstract: The co-extraction behavior of galena-pyrolusite in a sodium chloride solution and the electrochemical mechanism of this process were investigated, and some factors affecting the leaching rate of Pb and Mn were optimized. The results show that all the factors such as the concentration of NaCl, HCl and pyrolusite ore, reaction time, temperature, adding times of HCl, affect the leaching

  • Technical Note Dissolution of galena with acidified

    Experimental conditions for the leaching of lead from galena Quantity Values Temperature, oC 30, 35, 40*, 45, 50 Concentration of HOCl, % 10, 15, 20 33.8* Sodium chloride 3.0mol/l* Hydrochloric acid 2.0mol/l* Stirring speed,rpm 300*, 400, 500, 600 Particle size, μm 100, 150*, 200, 300 * The values kept constant The experimental conditions are summarised in Table 2. This involves varying one

  • CHLORIDE HYPOCHLORITE OXIDATION AND LEACHING OF

    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.