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molybdenum rhenium leaching

molybdenum rhenium leaching

Selective Recovery of Molybdenum over Rhenium from ...

2020-11-4  Abstract:Selective solvent extraction of molybdenum over rhenium from molybdenite (MoS2) flue dust leaching solution was studied. In the present work, thermodynamic calculations of the chemical equilibria in aqueous solution were first performed, and the potential–pH diagram for the Mo–Re–SO2 4–H2O system was constructed.

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Recovery of Molybdenum and Rhenium Using Selective ...

recovery of rhenium and molybdenum. 2. Experimental 2.1 Materials A synthetic alkali leaching solution was employed in the experiment to maintain the consistency of study. The leaching solution was prepared by adding desired amounts of rhenium powder (>99.9%, Aldrich), sodium molybdate (>99.0%, Samchun), calcium chloride (>99.0%, Junsei),

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Method of oxidative leaching of

A method for leaching molybdenum and/or rhenium from a sulfide ore and/or concentrate containing such, the method comprising the steps of: Exposing the ore and/or concentrate to an aqueous solution of chlorine-based oxidizing species in which the sum of the concentrations of hypochlorite and hypochlorous acid is at least 10 mol % of the chlorine-based oxidizing species; Allowing and/or ...

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Separation of rhenium and molybdenum from

2010-4-9  Molybdenum resources around the world are mainly associated with porphyry copper ores. Molybdenite (MoS2) is the main Mo mineral that has rhenium in its crystal lattice. This paper investigates the recovery of rhenium and molybdenum from a molybdenite concentrate using a hydrometallurgical treatment method.

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Recovery of Molybdenum and Rhenium Using

Two kinds of synthetic alkali leaching solutions were employed and more than 85% of molybdenum was recovered as a precipitate in the experimental conditions of 243.15 K, pH 2.2, 200 rpm of agitation speed, 7,200 s of reaction time, and 1.5 of equivalence ratio between NH 4

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Bioleaching of Sarcheshmeh molybdenite

2005-11-1  Both 9K medium and Norris medium were used as leaching media, and the extraction of molybdenum and rhenium were almost the same with both media. When the pulp density of molybdenite concentrate was 1%, there was an apparent selective extraction of rhenium (rhenium extraction, 7.3%; molybdenum extraction, 0.54%) due to the precipitation of molybdenum from the solution.

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Leaching kinetics, separation, and recovery of

2019-4-1  The leaching kinetics of rhenium from superalloy CMSX-4 in 100% aqua-regia solution fit into a chemical reaction controlled kinetics model for the first period of leaching. For the leaching period after 480 min, the leaching kinetics of rhenium fits a diffusion through the product layer model.

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Co-volatilizing-water leaching process for efficient ...

2020-3-1  During roasting at 600 °C, rhenium is first oxidized to Re 2 O 7 and volatilized into the flue dust, which is then treated by leaching and solvent extraction or ion exchange. Molybdenum which remains in calcine in the form of MoO 3 is leached with ammonia water, and finally precipitated as pure ammonium molybadate (Gupta, 1992; Xiang, 2002). This mainstream route presents many

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Review of rhenium extraction and recycling

2021-1-15  Rhenium is primarily produced as a by-product in molybdenum, copper, lead and uranium production from the concentrates and ores. Rhenium is extracted from roasting fume and dust, leaching residue, and aqueous solution to produce a rhenium bearing solution.

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Co-volatilizing-water leaching process for efficient ...

2020-3-1  Rhenium-bearing molybdenite concentrate is a typical mineral resource to recover molybdenum and rhenium, but has long been poorly utilized via oxidative roasting-leaching route. In this work, a novel flowsheet consisting of chloride leaching, co-volatilization, selective condensation, and water leaching has been proposed and verified on the ...

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Method of oxidative leaching of

A method for leaching molybdenum and/or rhenium from a sulfide ore and/or concentrate containing such, the method comprising the steps of: Exposing the ore and/or concentrate to an aqueous solution of chlorine-based oxidizing species in which the sum of the concentrations of hypochlorite and hypochlorous acid is at least 10 mol % of the chlorine-based oxidizing species; Allowing and/or ...

Get Price

Bioleaching of Sarcheshmeh molybdenite concentrate

2005-11-1  Both 9K medium and Norris medium were used as leaching media, and the extraction of molybdenum and rhenium were almost the same with both media. When the pulp density of molybdenite concentrate was 1%, there was an apparent selective extraction of rhenium (rhenium extraction, 7.3%; molybdenum extraction, 0.54%) due to the precipitation of ...

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Separation of rhenium and molybdenum from

2010-4-9  Molybdenum resources around the world are mainly associated with porphyry copper ores. Molybdenite (MoS2) is the main Mo mineral that has rhenium in its crystal lattice. This paper investigates the recovery of rhenium and molybdenum from a molybdenite concentrate using a hydrometallurgical treatment method.

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Silver-catalyzed bioleaching of copper, molybdenum

2015-10-1  Different pulp densities (3–9%) and initial pH values (1.5–1.9) were also tested in the bioleaching experiments but their effects were masked by enhancement of copper leaching due to silver catalysis. Molybdenum and rhenium responded comparably to changes in bioleaching conditions, suggesting that Re was located in the molybdenite matrix.

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Recovery of Molybdenum and Rhenium Using

Regarding NH 4 OH leaching solution, the optimal conditions for the formation of molybdenum precipitate were found to be 243.15 K, pH 2.5, 100 rpm of agitation speed, and 18,000 s of reaction time. The precipitation efficiency of molybdenum was higher than 99% in these conditions and molybdenum was observed to be precipitated as ammonium molybdate.

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Review of rhenium extraction and recycling

2021-1-15  The molybdenum and rhenium reacted according to reactions (3) and (4), respectively. 74% of rhenium was extracted from the lime-roasted calcine by water leaching. Zagorodnyaya et al. (2010) revealed that the formation of interphase substances during rhenium extraction from acid solutions was due to the presence of a black fine rhenium ...

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Leaching molybdenum from a low-grade roasted

2019-3-7  A technique for leaching molybdenum from low-grade roasted molybdenite concentrate was proposed by the aqueous solution containing sodium chlorate and sodium carbonate. The effect of molar ratio of sodium chlorate to molybdenum, leaching time, liquid–solid ratio, leaching temperature, sodium carbonate concentration and agitating speed on leaching rate of molybdenum was studied.

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碱熔-水浸法从钼精矿焙烧烟灰中回收铼和钼-【维普期刊官网 ...

The leaching rates of rhenium and molybdenum were 93.2% and 95.3%, respectively, when the concentration of hydrogen peroxide was 10%, leaching temperature was 70 ℃, leaching time was 2 h and liquid-solid ratio was 5: 1.

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Novel Aqueous Processing of the Reverted Turbine

2016-7-2  A preliminary study on the hydrometallurgical recovery of rhenium from an engine-reverted superalloy, CMSX-4, was performed. The novelty of this work dealt with (i) the applicability of electro-generated Cl2 in rhenium leaching and (ii) the maneuvering of the organic extractants based on the metal speciation in leach liquor. In a two-step HCl leaching, more than 98% rhenium was selectively ...

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Method of oxidative leaching of

A method for leaching molybdenum and/or rhenium from a sulfide ore and/or concentrate containing such, the method comprising the steps of: Exposing the ore and/or concentrate to an aqueous solution of chlorine-based oxidizing species in which the sum of the concentrations of hypochlorite and hypochlorous acid is at least 10 mol % of the chlorine-based oxidizing species; Allowing and/or ...

Get Price

Silver-catalyzed bioleaching of copper,

Different pulp densities (3–9%) and initial pH values (1.5–1.9) were also tested in the bioleaching experiments but their effects were masked by enhancement of copper leaching due to silver catalysis. Molybdenum and rhenium responded comparably to changes in bioleaching conditions, suggesting that Re was located in the molybdenite matrix.

Get Price

Recovery of Rhenium and Molybdenum from

Recovery of Rhenium and Molybdenum from Molybdenite Roasting Dust Leaching Solution by Ion Exchange Resins. Sung-Ho Joo 1) 2), Young-Uk Kim 1), Jin-Gu Kang 2), J. Rajesh Kumar 1) 2), Ho-Sung Yoon 2), P. K. Parhi 2), Shun Myung Shin 1) 2) 1) Department of Resource Recycling, University of Science Technology (UST) 2) Extractive Metallurgy ...

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Technical Details « Metaleach Limited

MoReLeach Patent Technical Description. MetaLeach has been granted a patent for a Method Oxidative Leaching of Molybdenum – Rhenium Sulphide Ores and/or Concentrates in Australia, with patents in other countries pending. The patent is directed to the MoReLeach technology, a sister technology to the Company’s HyperLeach ® technology (patents granted and pending).

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Molybdenum beneficiation and smelting

2020-9-27  The rhenium in the molybdenum concentrate is mainly recovered from the oxidative roasting flue gas leaching liquid or oxygen pressure cooking liquid of the molybdenum concentrate, and then extracted from the solution or ion exchange method to make potassium perrhenate or ammonium perrhenate , And then use the reduction method to make high ...

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Extraction of molybdenum and rhenium from

OSTI.GOV Technical Report: Extraction of molybdenum and rhenium from concentrates by electrooxidation Title: Extraction of molybdenum and rhenium from concentrates by

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extraction of molybdenum Prominer (Shanghai)

Selective Recovery of Molybdenum over Rhenium - MDPI. 26 Oct 2020 Abstract: Selective solvent extraction of molybdenum over rhenium from molybdenite MoS2 flue dust leaching

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Leaching molybdenum from a low-grade roasted

2019-3-7  A technique for leaching molybdenum from low-grade roasted molybdenite concentrate was proposed by the aqueous solution containing sodium chlorate and sodium carbonate. The effect of molar ratio of sodium chlorate to molybdenum, leaching time, liquid–solid ratio, leaching temperature, sodium carbonate concentration and agitating speed on leaching rate of molybdenum was studied.

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碱熔-水浸法从钼精矿焙烧烟灰中回收铼和钼-【维普期刊官网 ...

The leaching rates of rhenium and molybdenum were 93.2% and 95.3%, respectively, when the concentration of hydrogen peroxide was 10%, leaching temperature was 70 ℃, leaching time was 2 h and liquid-solid ratio was 5: 1.

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Novel Aqueous Processing of the Reverted Turbine

2016-7-2  A preliminary study on the hydrometallurgical recovery of rhenium from an engine-reverted superalloy, CMSX-4, was performed. The novelty of this work dealt with (i) the applicability of electro-generated Cl2 in rhenium leaching and (ii) the maneuvering of the organic extractants based on the metal speciation in leach liquor. In a two-step HCl leaching, more than 98% rhenium was selectively ...

Get Price

Recovery of Rhenium and Molybdenum from

Recovery of Rhenium and Molybdenum from Molybdenite Roasting Dust Leaching Solution by Ion Exchange Resins. Sung-Ho Joo 1) 2), Young-Uk Kim 1), Jin-Gu Kang 2), J. Rajesh Kumar 1) 2), Ho-Sung Yoon 2), P. K. Parhi 2), Shun Myung Shin 1) 2) 1) Department of Resource Recycling, University of Science Technology (UST) 2) Extractive Metallurgy ...

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Analytical Separation of Rhenium and Molybdenum

2019-5-26  Anal. Chem. All Publications/Website. OR SEARCH CITATIONS

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Extraction of molybdenum and rhenium from

OSTI.GOV Technical Report: Extraction of molybdenum and rhenium from concentrates by electrooxidation Title: Extraction of molybdenum and rhenium from concentrates by

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Molybdenum beneficiation and smelting technology ...

2020-9-27  The rhenium in the molybdenum concentrate is mainly recovered from the oxidative roasting flue gas leaching liquid or oxygen pressure cooking liquid of the molybdenum concentrate, and then extracted from the solution or ion exchange method to make potassium perrhenate or ammonium perrhenate , And then use the reduction method to make high ...

Get Price

Molybdenum ore processing technology

2014-7-29  Rhenium in molybdenum concentrate, molybdenum concentrate mainly from oxidative leaching solution or roasting smoke boiled liquid oxygen pressure recovery, and then using the extraction or ion exchange method from solution into a high potassium or ammonium perrhenate rhenium , and then restore the rule of law into high-purity rhenium powder.

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Polytypism in molybdenite (II); Relationships between ...

Supergene alteration also results in rhenium leaching, but kinetic barriers impede recrystallization to the 2H i polytype. A model is suggested to account for this behavior, based on different solubilities of rhenium and molybdenum as a function of K + /Na + and pH changes in the hydrothermal solutions.

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extraction of molybdenum Prominer (Shanghai)

Selective Recovery of Molybdenum over Rhenium - MDPI. 26 Oct 2020 Abstract: Selective solvent extraction of molybdenum over rhenium from molybdenite MoS2 flue dust leaching

Get Price

Leaching molybdenum from a low-grade roasted

2019-3-7  A technique for leaching molybdenum from low-grade roasted molybdenite concentrate was proposed by the aqueous solution containing sodium chlorate and sodium carbonate. The effect of molar ratio of sodium chlorate to molybdenum, leaching time, liquid–solid ratio, leaching temperature, sodium carbonate concentration and agitating speed on leaching rate of molybdenum was studied.

Get Price

Novel Aqueous Processing of the Reverted Turbine

2016-7-2  A preliminary study on the hydrometallurgical recovery of rhenium from an engine-reverted superalloy, CMSX-4, was performed. The novelty of this work dealt with (i) the applicability of electro-generated Cl2 in rhenium leaching and (ii) the maneuvering of the organic extractants based on the metal speciation in leach liquor. In a two-step HCl leaching, more than 98% rhenium was selectively ...

Get Price