Kinetics of Copper Removal from Sulfidized Molybdenite ...

REMOVAL OF COPPER FROM MOLYBDENITE CONCENTRATES BY SULFIDATION AND LEACHING. Tipo Proyecto. Programa Programa FONDECYT. Instrumento Conicyt Proyectos Regulares. Estado. Aprobado. Fecha del concurso 2011. Autor Padilla-Duran, Rafael. N° de proyecto .

USA - Process for purifying molybdenite ...

Jan 19, 2020· But, in order to extract these intermediary products from molybdenite ore, it must first be crushed and floated to separate copper sulfide from the molybdenite. The resulting molybdenum sulfide (MoS2) is then roasted at between C°( F°) to produce roasted molybdenite concentrate (MoO3, also referred to as technical molybdenum ...

USA - Process for purifying molybdenite ...

Separation and upgrading the molybdenite from the bulk copper-molybdenite concentrate is generally accomplished by selective molybdenite flotation following copper and iron sulphide depression. Standard depressant schemes include high pH via lime addition, sodium hydrosulphide, Nokes reagent, etc.

Removal of Copper from a Molybdenite Concentrate by ...

molybdenite concentrate copper flotation Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US424621A Inventor Charles M Nokes Original ...

Roasted Molybdenite Concentrate - Climax Molybdenum

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.

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

Patent US – 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 … »More detailed

Comparative study on the selective chalcopyrite ...

Refining of a low-grade molybdenite concentrate Solvent extraction of bismuth with 2-ethylhexylphosphonic acid mono-(2-ethylhexyl) ester and 2,2′-bipyridyl Development of a solvent extraction process for production of nuclear grade dysprosium oxide from a crude concentrate

Copper Remove From Molybdenum Concentrate Processing

Bioleaching tests showed a progressive removal of chalcopyrite from the molybdenite concentrate with an increase in temperature. Chemical leaching tests support the idea of an indirect attack of the concentrate. Electrochemical tests indicate that chalcopyrite dissolution is favored when molybdenite …

remove molybdenum by flotation - BINQ Mining

An improved process is disclosed for the treatment of molybdenite concentrate to remove impurities, such as copper and lead therefrom. According to this process, ferrous chloride liquor is introduced into a reactor which is made of a material that can withstand leaching with the use of ferric chloride at elevated temperatures and pressures.

The solvent extraction separation of bismuth and ...

Nov 01, 2013· Consequently, removal of copper from molybdenite concentrate by extreme thermophiles and mesophiles in a 50 L stainless steel bioreactor was investigated. The optimal conditions of pulp density, size of inoculum, pH and temperature determined in the shake flask tests were employed.

A review of copper–arsenic mineral removal from copper ...

May 01, 1998· 1. Introduction. Molybdenite (MoS 2) concentrates are commonly obtained as byproduct in the treatment of copper porphyry ores in which the molybdenite is a minor constituent.The conventional process to separate molybdenite from the bulk copper–molybdenum concentrate is differential flotation, which includes successive recleaning steps in order to produce high-grade molybdenite concentrate.

Copper removal from molybdenite concentrate by sodium ...

Removal of Copper from a Molybdenite Concentrate by Chloride Leaching Jack Smitha and Joe Soapb a University of Botswana, Gaberone, Botswana b Namibian University of Science and Technology, Windhoek, Namibia Introduction Molybdenite (MoS 2) is usually associated with copper sulphide minerals such as

Molybdenum Processing

Mixed mesophilic and extreme thermophilic bioleaching were evaluated to remove copper from the molybdenite concentrate. Bioleaching tests were carried out in shake flasks and in a 50-L bioreactor.

Acid Pressure Leach Process for Copper Removal

Feb 19, 1985· An improved process is disclosed for the treatment of molybdenite concentrate to remove impurities, such as copper and lead therefrom. According to this process, ferrous chloride liquor is introduced into a reactor which is made of a material that can withstand leaching with the use of ferric chloride at elevated temperatures and ...

Removal of copper from molybdenite concentrate by ...

GBA GBA GBA GBA GB A GB A GB A GB A GB A GB A GB A GB A GB A GB A GB A GB A Authority GB United Kingdom Prior art keywords extraction process characterized iron temperature Prior art date Legal status (The legal status is an …

Copper Removal from Molybdenite by Sulfidation-Leaching ...

Removal of Copper from a Molybdenite Concentrate by Chloride Leaching Jack Smitha and Joe Soapb a University of Botswana, Gaberone, Botswana b Namibian University of Science and Technology, Windhoek, Namibia Introduction Molybdenite (MoS 2) is usually associated with copper sulphide minerals such as

Removal of Copper from a Molybdenite Concentrate by ...

Molybdenite flotation concentrate was leached with sodium dichromate–sulfuric acid solutions in order to remove the copper sulfide impurities. The experimental results indicated that the temperature has a large influence on the copper dissolution. The concentration of dichromate has also a pronounced effect for concentrations under 0.10 M ...

Copper removal from molybdenite concentrate by sodium ...

An improved process is disclosed for the treatment of molybdenite concentrate to remove impurities, such as copper and lead therefrom. According to this process, ferrous chloride liquor is introduced into a reactor which is made of a material that can withstand leaching with the use of ferric chloride at elevated temperatures and pressures.


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