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molybdenum concentration ferric chloride leaching

Remove Copper from Moly by Ferric Chloride LeachingTable of ContentsProcess ChemistryGeneral Flow SheetSolution Regeneration The Anaconda Minerals Company operates a molybdenite and copper producing mine and mill facility near Tonopah, Nevada. Included with the milling facility is a ferric chloride leach Hydrometallurgical recovery of molybdenum from the Questa leach solution or presence of chlori

The leaching of chalcopyrite with ferric chloride NASA/ADS

A comparative study of electrochemical leaching and chemical leaching of chalcopyrite was done to elucidate the leaching mechanism of chalcopyrite with FeCl 3 . The leaching rate of chalcopyrite exhibits a half order dependency on the FeCl 3 concentration, whereas it is independent of the FeCl 2 concentration. The mixed potential of chalcopyrite exhibits a 72 mV 183; decadelt;SUPgt;1lt;/SUP

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Leaching of Primary Copper Sulfide Ore in ChlorideFerrous

concentration of ferric ions) promote passivation of chalcopyrite [5]. On the other hand, ferrous ions may increase the leaching kinetics significantly compared to ferric ions [6,20,21]. This is in contrast through to other leaching processes, such as the bacterial leaching of g sulfide concentrates, where

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Recovery of Silver, G, and Lead From a Complex Sulfide

USING FERRIC CHLORIDE, THIOUREA, AND BRINE LEACH SOLUTIONS By R. G. Sandberg 1 and J. L. Huiatt 2 ABSTRACT The Bureau of Mines investigated a hydrometallurgical procedure to re173; cover g, silver, and byproduct lead from a complex leadzinc sulfide ore. A ferric chloride (FeCI3 ) preleach, at 40176; C in 6 h, extracted

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Leaching of chalcopyrite with ferric ion. Part I General

Aug 01, 20080183;32; It favours leaching of the mineral when the ferric concentration is suitable. It causes passivation of the mineral surface and protects it from attack through the formation of intermediate compounds when the ferric concentration is high.

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mining molybdenum beneficiation ferric chloride leaching

Now China is still recovering from a coppermolybdenum ore beneficiation of molybdenum copper and molybdenum is commonly bulk flotation process and thus coppermolybdenum separation and selection of molybdenum concentrate ferric chloride leaching method except molybdenum concentrate impurities Some of the colored system from molybdenum. Read More

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US4083921A Purifying molybdenum flotation concentrates

Copper, iron, and lead impurities are removed from molybdenum flotation concentrates by mixing the feed concentrates with a nonvolatile chloride salt, heating the mixture to a temperature of from about 200176; to 350176; C for a time sufficient to activate the lead impurities in the concentrates so that they can be leached therefrom during the subsequent leach step, and leaching copper, iron, and

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Purification of molybdenum xide calcine by selective

The effects of temperature, concentration, and quantity of ferric chloride, stirring speed, and leaching time on [Show full abstract] metal dissolution have been investigated. Leaching tests

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Process for purifying molybdenite concentrates Brenda

A process for purifying molybdenite concentrate for the removal of impurities therefrom, which comprises providing a reactor with heating and agitator means, which reactor is made of a material that can withstand leaching with the use of ferric chloride containing brine at elevated temperatures and pressures; introducing into said reactor ferrous chloride liquor and makeup water to give a predetermined iron concentration such that, upon chlorination, a sufficient amount of ferric ion

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Oxidative Leaching of Chalcopyrite by Cupric Ion in

Chalcopyrite leaching in sulfuric acid solutions depends on the redox potential determined by the concentration ratio of ferric to ferrous ions, and the leaching rate is higher at redox potentials

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Recovery of Silver, G, and Lead From a Complex Sulfide

USING FERRIC CHLORIDE, THIOUREA, AND BRINE LEACH SOLUTIONS By R. G. Sandberg 1 and J. L. Huiatt 2 ABSTRACT The Bureau of Mines investigated a hydrometallurgical procedure to re173; cover g, silver, and byproduct lead from a complex leadzinc sulfide ore. A ferric chloride (FeCI3 ) preleach, at 40176; C in 6 h, extracted

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Hydrometallurgical recovery of molybdenum from the Questa

leach solution or presence of chloride ions would result in a loss of silver, a large economic factor. A cheaper catalyst, if available, could make this process more attractive. Ferric chloride in acid solution did not oxidize molybdenite under the conditions investigated. In dilute nitric acid, molybdenite is

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Molybdenum Removal from Wastewater Revisited Products

Mar 01, 20100183;32;We then feed a ferricbased coagulant to help precipitate the molybdenum. Normally we have to feed the coagulant at a rate of at least 15215; the moly concentration. The ferricbased coagulant can be ferric chloride, ferric sulfate or a combination of ferric with an organic coagulant mix (the organic coagulant seems to reduce the required dosage).

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Leaching of chalcopyrite in cupric chloride solution

[Cu2+] = 0.79 1.46 M and [Cl] = 2.82 6.21 M at 90 186;C, neither cupric nor chloride ion concentration influences the rate of chalcopyrite dissolution. In HydroCopperTM the leaching of chalcopyrite is done in a cupric chloride solution at atmospheric pressure and at a temperature of 80100 ˚C. The pH is kept in between 1.5 and 2.5.

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Acid Pressure Leach Process for Copper Removal

ric acid, cyanide ion (Dorfler and Laferty, 1981) or with ferric chloride solution (Platzke and Harbuck, 1994). Recently, Ruiz and Padilla (1998) have developed a selective process with sodium dichromate for copper leaching from a molybdenite concentrate containing 41.1 % molybdenum and 3.65 % copper in the form of chalcopyrite and covellite (CuS).

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Representation of the Kinetics of Leaching of Galena by

Abstract. 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 KMnO 4 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

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Chemical miningA study of leaching agents

a ferric chloridesodium chloride solvent which, in turn, leached the semioxidized sulfide copper minerals. In test S40, a saturated solution of sodium chloride dissolved 0.22 gpl of iron from an equal weight of minus 48 mesh, acidwashed pyrite in 9 days. Possibly, sodium chlorideferric chloride solution for subsequent use as a leaching agent

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Molybdenum Removal from Wastewater Revisited Products

Mar 01, 20100183;32;We then feed a ferricbased coagulant to help precipitate the molybdenum. Normally we have to feed the coagulant at a rate of at least 15215; the moly concentration. The ferricbased coagulant can be ferric chloride, ferric sulfate or a combination of ferric with an organic coagulant mix (the organic coagulant seems to reduce the required dosage).

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2008012 MASTER'S THESIS DiVA portal

Leaching with sodium cyanide was carried out with stoichiometric concentration of the salt, 20% solids, at ambient temperature and pH above11 with oxygen as oxidative gas, for 53 and 74 hours. Ferric chloride leaching was carried out at 35% solids with 10% ferric chloride, 1%

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Copper removal from molybdenite concentrate by sodium

May 01, 19980183;32;Common methods of chemical purification in industrial practice include cyanide leaching, ferric chloride leaching, and hydrochloric acid leaching processes . The purpose of this investigation was to study an alternative method to remove copper impurities from molybdenite concentrates by leaching with acid solutions of sodium dichromate (H 2 SO 4 Na 2 Cr 2 O 7 ).

Hydrometallurgical recovery of molybdenum from the

Ferric chloride in acid solution did not oxidize molybdenite under the conditions investigated. In dilute nitric acid, molybdenite is oxidized; but the oxidized form of molybdenum in nitric acid is molybdic acid (H2MoO4), which is not soluble to any appreciable extent unless sulfuric acid is also added to the leach

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Kinetics and mechanisms of g dissolution by ferric

von Bonsdorff (2006) used a maximum chloride concentration of 5.0 M for g leaching, while Lundstr246;m et al. () stated that the chloride concentration in ferric chloride leaching process can be below 120 g L1 (lt;3.39 M). However, it must be noted that the optimal chloride concentration depends on raw material, with increasing im

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Molybdenum removal from copper ore concentrate by sodium

Jan 01, 20110183;32;The removal of molybdenum from a copper ore concentrate by sodium hypochlorite leaching was investigated. The results show that leaching time, liquid to solid ratio, leaching temperature, agitation speed, and sodium hypochlorite and sodium hydroxide concentrations all have a significant effect on the removal of molybdenum.

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US Patent for Recovery of elemental sulfur and metal

The ground solids are then subjected to ferric chloride leach for about three hours at 105.degree. C., after which the pulp is filtered and the filtrate containing the solubilized copper and iron as chlorides is sent back to the main hydrometallurgical leach circuit. The ferric chloride leaching temperature used is

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Iron(III) chloride

Iron(III) chloride is the inorganic compound with the formula (Fe Cl 3).Also called ferric chloride, it is a common compound of iron in the +3 oxidation state.The anhydrous compound is a crystalline solid with a melting point of 307.6 176;C. The color depends on the viewing angle by reflected light the crystals appear dark green, but by transmitted light they appear purplered.

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Remove Copper from Moly by Ferric Chloride Leaching

Table of ContentsProcess ChemistryGeneral Flow SheetSolution Regeneration The Anaconda Minerals Company operates a molybdenite and copper producing mine and mill facility near Tonopah, Nevada. Included with the milling facility is a ferric chloride leach

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US Patent for Recovery of elemental sulfur and metal

The ground solids are then subjected to ferric chloride leach for about three hours at 105.degree. C., after which the pulp is filtered and the filtrate containing the solubilized copper and iron as chlorides is sent back to the main hydrometallurgical leach circuit. The ferric chloride leaching temperature used is

Purification of molybdenite concentrates

Leaching with sodium cyanide was carried out with stoichiometric concentration of the salt, 20% solids, at ambient temperature and pH above11 with oxygen as oxidative gas, for 53 and 74 hours. Ferric chloride leaching was carried out at 35% solids with 10% ferric chloride, 1% cupric chloride, 20% calcium chloride all by weight of solution at an

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Kinetics of Leaching Galena Concentrates with Ferric

Zinc concentration in leachate for various pulp densities at 65176;C 82 Figure 29. Leaching of lead from Type 2 concentrate at 45176;C 83 Figure 30. Results for the leaching of Red Dog concentrate at 45 and 65176;C, using 10 g of concentrate 84 Figure 31. A proposed flowsheet for the recovery of lead by the ferric fluosilicate leaching of a galena

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Mineral Processing 101 Molybdenum Ore Beneficiation

The beneficiation processing of molybdenum ore is mainly performed by flotation, and the recovered molybdenum mineral is molybdenite(MoS2). Sometimes in order to improve the quality of molybdenum concentrate and remove impurities, the concentrated molybdenite would be subjected to a further step of chemical beneficiation processing.

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US3674424A Process for purifying molybdenite

IMPURITIES ARE REMOVED FROM MOLYBDENITE CONCENTRATES BY LEACHING THE CONCENTRATES AT A TEMPERATURE OF AT LEAST 70* C. WITH AN AQUEOUS SOLUTION CONTAINING AT LEAST ONE ALKALI METAL OR ALKALINE EARTH

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A review of chloride assisted copper sulfide leaching by

2007). Elemental sulfur formed during the leaching of chalcopyrite with ferric chloride is also more porous than that formed with ferric sulfate, thus the leaching rate is an order of magnitude larger in the former (Majima et al., 1985). Peters (1976a) reported that chalcopyrite, the

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Uranium and molybdenum recovery from copper leaching

Mar 01, 0183;32;The concentration of these solutions and the working conditions are very different from the typical uranium and molybdenum process. High concentrations of impurities, like chloride ions, and low concentrations of both uranium and molybdenum, requires the application of a new process, capable of recover them in separate ways.

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COPPER HYDROMETALLURGY AND EXTRACTION FROM

Chloride and its compounds, including metal chlorides, are effective oxidants. Ferric chloride and cupric chloride oxidise many materials rapidly and can be generated readily by electrolysis or oxidation with chlorine. For rapid and complete leaching of copper sulphides, and chalcopyrite in particular, strong oxidising conditions are necessary.

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Molybdenum beneficiation and smelting technology

The frequency of molybdenum beneficiation mainly depends on the total enrichment ratio of molybdenum. Address N0.2555,Xiupu Road, Kangqiao Industrial Area, Pudong, . Jinduicheng Molybdenum Concentrator has adopted hydrochloric acidferric chloride leaching method to remove impurities in molybdenum concentrate.

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