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molybdenite concentrate copper leaching

Kinetics of copper dissolution in the purification of ...

May 01, 2013· The leaching of the sulfidized molybdenite concentrate in sulfate–chloride–oxygen media for 90 min at 100 °C dissolved 96% of the copper which yielded a final concentrate with less than 0.2% Cu. Under these leaching conditions, the molybdenum dissolution was negligible and iron dissolution was lower than 20%.

Mixed Moderate Thermophilic Bioleaching of Cu, Mo and Re ...

2.1. Molybdenite concentrate and characterization studies A representative sample of molybdenite concentrate from the Sarcheshmeh Copper Complex of Iran with a size distribution of 90 wt. % less than 38 μm was used for bioleaching tests. The d 80 of the sample was determined to be 33 μm using cyclosizer equipment. Molybdenite

UP-GRADATION OF MoO3 COPPER, IRON, ZINC FROM …

Up-Gradation of MoO3 and Separation of Copper, Iron, Zinc from Roasted Molybdenum Ore by a Leaching Process 393 Brazilian Journal of Chemical Engineering Vol. 30, No. 02, pp. 391 - 397, April - June, 2013 oxide with improved content was obtained by a

Leaching and Kinetic Modelling of Molybdenite Concentrate ...

ABSTRACT: Leaching of molybdenite concentrate with hydrogen peroxide in sulfuric acid solution was investigated to determine the effects of reaction time, reaction temperature, H 2O 2 concentration, H 2SO 4 concentration, pulp density and rotation speed on molybdenum extraction and molybdenite dissolution kinetics, using the Taguchi method.

Kinetics of Copper Removal from Sulfidized Molybdenite ...

Aug 26, 2014· To produce a high-grade molybdenite concentrate, a chemical purification method is normally practiced. In this paper, a new alternative for the copper elimination from molybdenite concentrates containing chalcopyrite by sulfidation of the molybdenite concentrate and subsequent pressure leaching in sulfuric acid-oxygen media is discussed.

Comparative study on the selective chalcopyrite ...

Comparative study on the selective chalcopyrite bioleaching of a molybdenite concentrate with mesophilic and thermophilic bacteria P. Romano a, M.L. Bla¤zquez a, F.J. Alguacil b, J.A. Mun‹oz a, A. Ballester a;*, F. Gonza¤lez a a Department of Material Sciences and Metallurgical Engineering, Faculty of Chemical Sciences, University Complutense of Madrid, Ciudad Universitaria,

Acidic Leaching with Chlorate as Oxidizing Agent to ...

(2015). Acidic Leaching with Chlorate as Oxidizing Agent to Extract Mo and Re from Molybdenite Flotation Concentrate in a Copper Plant. Separation Science …

Copper Removal from Molybdenite by Sulfidation-Leaching ...

The process involves a sulfidation of the molybdenum concentrate with 82(g) at 380 °C followed by a leaching stage. H 2 SO 4-NaCl-O 2 leaching of a sulfidized concentrate containing 3.4% Cu for 90 min at 100°C produced a molybdenite concentrate with less than 0.2% Cu, which is appropriate for marketing. Molybdenite dissolution was negligible ...

Molybdenum Processing

Flotation separates the metallic minerals from the gangue this way and – in the case of copper/ molybdenum ores – separates molybdenite from copper sulphide. The resulting MoS 2 concentrate contains between 85% and 92% MoS 2. Further treatment by acid leaching can be used to dissolve impurities like copper and lead if necessary.

How is Molybdenum Extracted - SAMaterials

Electro oxidation leaching method: it is improved by sodium hypochlorite method, the method is adding molybdenite mineral slurry to the electrolytic tank, has been equipped with Sodium Chloride Solution in the electro oxidation process, Cl2 and anode products react with water to produce hypochlorite, molybdenum sulfide hypochlorite oxidation in ...

Selective copper dissolution during bioleaching of ...

The leaching of the sulfidized molybdenite concentrate for 90 min at 100 °C dissolved 96% of the copper which yielded a final concentrate with less than 0.2% Cu.

Mechanism and leaching kinetics of molybdenite …

molybdenite concentrate leaching, demonstrating the scarcity of information on this subject. 1.1. State of the art . Several studies on molybdenite concentrate leaching have appeared in the literature. et al. (2009) Cao leached molybdenum from molybdenite concentrate (41.40% Mo, 31.40% S, 2.20% Cu) using a NaClO. 3-

Leaching and Kinetic Modelling of Molybdenite Concentrate ...

KEY WORDS: Molybdenite, Leaching, Kinetics, Hydrogen peroxide, Taguchi . INTRODUCTION Molybdenite (a mineral form of molybdenum (IV) sulfide, MoS 2) is a byproduct of froth flotation of porphyry copper and is the main source of molybdenum (widely used in …

1 J.W. Blossom, Molybdenum, from Minerals Yearbook …

Molybdenite is recovered from either primary molybdenite or copper sulfide ore by flotation, after the ore has been crushed and ground to a suitable size. Several stages of grinding and reflotation concentrate the molybdenite in the primary ore to a 90 to 95 percent purity concentrate.4 The remainder of the concentrate is primarily silica.5 Copper,

2008:012 MASTER'S THESIS

minimum dissolution of molybdenum in the concentrate. Copper is present in the concentrate mainly as copper sulphide, chalcopyrite. Investigations were carried out on the removal of the sulphide by their selective leaching in sodium cyanide, ferric chloride and ferric sulphate solutions.

Kinetics of Copper Removal from Sulfidized Molybdenite ...

The leaching of the sulfidized molybdenite concentrate for 90 min at 100 °C dissolved 96% of the copper which yielded a final concentrate with less than 0.2% Cu.

Removal of Metallic Impurities from Off-Grade Copper ...

The removal of metallic impurities from off-grade copper concentrate was investigated in alkaline solution with H2O2. The analysis results of XRD and SEM-EDS revealed the oxidative mechanisms of all sulfides. The influence of various parameters of alkaline leaching were investigated including concentrations of sodium hydroxide and hydrogen peroxide, liquid to solid ratio, leaching time and ...

US7794677B2 - Reduction of copper content in the ...

Methods and systems for removing copper minerals from a molybdenite concentrate. One embodiment provides leaching copper from the molybdenite concentrate with a leaching solution comprising ferric chloride, removing molybdenite from the leaching solution, introducing an acid into the leaching solution and introducing O 2, O 3, or a combination of both, into the leaching solution.

(PDF) Selective copper dissolution during bioleaching of ...

Selective copper dissolution during bioleaching of molybdenite concentrate

Investigation of Leaching Kinetics of Copper from ...

The selective leaching and separation of molybdenum from complex molybdenite concentrate containing copper. Li-feng Li; Zhan-fang Cao; Hong Zhong; Ming-ming Wang; Guang-yi Liu; Shuai Wang; and Xiao-yu Ca // Minerals & Metallurgical Processing;Nov2013, Vol. 30 Issue 4, p233

Bioleaching of a Copper Sulphide Concentrate by Two ...

Jan 06, 2012· : Bioleaching of a Copper Sulphide Concentrate by Two Different Strains of . Acidophilic. Bacteria . pyrite –FeS. 2, pyrrhotite –FeS. X, violarite–(FeNi) 3. S. 4, millerite- NiS and molybdenite-MoS. 2. as the minor phases. Petrology of copper concentrate (Figure 1(a)) also indicates that chalcopyrite and pentlandite are the major phases ...

Silver-catalyzed bioleaching of copper, molybdenum and ...

Oct 01, 2015· The effect of silver on the mesophilic bioleaching of the molybdenite concentrate was tested in the range of 0–1000 mg Ag l −1, added as AgNO 3.Selective results are shown in Fig. 1 as examples of changes over time in pH, redox potential, cell counts and the leaching of Cu, Mo, and Re with 0, 120, and 1000 mg l −1 Ag addition.. Download : Download full-size image

Comparative study on the selective chalcopyrite ...

The electrodes were prepared from both the as-received molybdenite concentrate and the bioleaching and chemical leaching residues. In order to start with a compact electrode, 0.1 g of mineral sample was mixed with 0.9 g of a conductor material (graphite) in 5 ml of chloroform.

to Extract Mo and Re from Molybdenite Flotation a 37-41 ...

Acidic Leaching with Chlorate as Oxidizing Agent to Extract Mo and Re from Molybdenite Flotation Concentrate in a Copper Plant Hadi Abdollahi. a,b, Mohammad Noaparast. a, Sied Ziaedin Shafaei. a, Zahra Manafi. c, Ceren Erust. b, Ata Akcil. b,* a. School of Mining, College of Engineering, University of Tehran, Tehran 1439957131, Iran . b