molybdenite concentrate copper leaching

Hydrochloric Acid Copper Leaching

Table of ContentsPertinent Chemistry and MineralogyPreliminary Process ConsiderationsExperimental Data Experimentation with chalcopyrite concentrate in dilute hydrochloric acid, under reflux conditions (in Pyrex flasks) and with an inert purge gas, revealed substantial amounts of H2S production and iron solubilization, with negligible copper solubilization, after 2½4 days.

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Selective copper–iron dissolution from a molybdenite ...

The present research reports on the selective dissolution of copper and iron from a Chilean molybdenite concentrate using mesophilic, moderate and extreme thermophilic culture bacteria.

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Comparative study on the selective chalcopyrite ...

Generally, molybdenite, which is frequently associated to copper sulfides, is a byproduct in copper mining. At present, molybdenite flotation concentrates are obtained. The presence of chalcopyrite in a molybdenite concentrate drastically reduces its market value due to terms imposed by buyers.

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USB2 Leaching process for copper concentrates ...

A method of recovering copper from chalcopyrite concentrate by chemical leaching, using pyrite and silver. The catalytic properties of pyrite in the chalcopyrite leaching process are significantly enhanced by pretreating the pyrite with silver ions. Particulate pyrite is exposed to a solution containing silver ions to form silvertreated pyrite.

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Roasting of Molybdenite Concentrates in Pilot Scale Rotary ...

2 concentrate via total oxidizing roasting and leaching processes. 2. Experimental Procedure In this study molybdenite concentrates which obtained from Özdo÷u ønú. Tic. Ltd. ùti. is roasted in rotary furnace. Chemical composition of the concentrates is given at Table 1 and XRD analysis in Figure 1. Table 1.

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Biodissolution of Cu, Mo and Re from molybdenite ...

removal of copper from molybdenite via bioleaching [10]. The aim of the present work was to examine the dissolution of copper, molybdenum and rhenium during bioleaching of molybdenite concentrate from the Sarcheshmeh Copper Mine using a mixed culture of native mesophilic microorganisms under the conditions of higher ORP.

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Morenci Copper Mine, Arizona Mining Technology | Mining ...

Morenci copper mine development. However, in 2005, the company announced the goahead for a 210m project to create the world's first commercial copperconcentrate leaching / direct electrowinning operation at Morenci, a proprietary technology that allows primary sulphide ore treatment by leaching in combination with secondary ore processing.

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Process for treating molybdenite concentrates Donahue ...

When the original molybdenite concentrate contains over 3% copper and only a small amount of insoluble matter, such as silica, we have found the residue will analyze about 20% copper. This material is admirably adapted for sale to a copper smelter as it is free of sulphur and has a high iron content which 30. is of value as flux.

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COPPER Copper production TU Delft

Generally, copper extraction follows the sequence (see Figure below): 1. Beneficiation by froth flotation of ore to give copper concentrate (Optional partial roasting to obtain oxidized material or calcines) 2. Twostage pyrometallurgical extraction 1. smelting concentrates to matte 2. converting matte by oxidation to crude (converter or blister) copper 3.

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Felipe Guerrero Project Assistant Intern PNO ...

Thesis work "Copper removal from a molybdenite concentrate by pretreatment and leaching in NaClH2SO4 medium." Main courses: Mineral Processing, Froth Flotation, Hydrometallurgy, Electrometallurgy, Material Science. Thesis work "Copper removal from a molybdenite concentrate by pretreatment and leaching in NaClH2SO4 medium."

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Sherritt International Operations Technologies ...

Leaching of nickelcopper matte and recovery of platinum group metals Sherritt's matte leach process uses sulphuric acid leaching in a combination of atmospheric and/or pressure leaching steps to quantitatively dissolve nickel and copper in nickelcopper matte and produce a highgrade platinum group metal (PGM) concentrate for refining.

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Bioleaching of a Copper Sulphide Concentrate by Two ...

dissolution of copper in chemical as well as bio leaching, but there was some effect of bacterial oxidation on leaching of nickel and cobalt. Bioleaching with Shaking . Bioleaching of concentrate (≤200 µm size) was carried out with shaking without additive (data not shown). Copper recovery was very low in sterile (4%) as well as in the

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(PDF) Selective copperiron dissolution from a molybdenite ...

The present research reports on the selective dissolution of copper and iron from a Chilean molybdenite concentrate using mesophilic, moderate and extreme thermophilic culture bacteria.

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BIOLEACHING OF A COPPER SULPHIDE CONCENTRATE BY .

BIOLEACHING OF A COPPER SULPHIDE CONCENTRATE BY TWO DIFFERENT STRAINS OF ACIDOPHILIC BACTERIA K. D. MEHTA, B. D. PANDEY ... (OU, Hyderabad) adapted over copper concentrate serially for four times at pH and used for leaching, improved the kinetics showing biorecovery of 83% Ni and 88% Co in ... Phases in concentrate and leach residue were ...

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2008:012 MASTER'S THESIS

A molybdenite flotation concentrate was refined by selective removal of copper impurity with 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

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Copper Removal from Molybdenite by SulfidationLeaching ...

This paper is concerned with a novel process of chemical purification of molybdenite concentrates containing chalcopyrite as the main copper impurity. The process involves a sulfidation of the molybdenum concentrate with 82(g) at 380 °C followed by a leaching stage.

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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 steel alloys) and its compounds [1].

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Kinetics of Copper Removal from Sulfidized Molybdenite ...

To produce a highgrade 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 acidoxygen media is discussed.

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英语翻译 ...

英语翻译 Purification of low grade molybdenite by acid leaching processes High purity(>98%) molybdenum disulfide from molybdenite is an excellent solid lubricant,which can be used in automobile,aerospace and military is the most widely used concentrate in the production of usually contains some sulfide minerals such as covellite (CuS),pyrite (FeS2) and .

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SGS MINERALS SERVICES – T3 SGS 174 092013

PLATSOL™ is a single step, high temperature pressure leaching processing which the base metals sulphides are oxidized with oxygen to soluble metal sulphate complexes and sulphuric acid while the gold and the PGM are solubilized as chlorocomplexes by the addition a .

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Processing method of molybdenite concentrates

SUBSTANCE: processing method of molybdenite concentrates includes concentrate chlorination at temperature not more than 450°C, collection of molybdenum dioxychloride in condenser and its conversion to ammonium paramolybdat. At that alcali metal chlorides are used as chlorinating agent.

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USB2 Reduction of copper content in the ...

The method includes separating a molybdenite concentrate from the copper ore, 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.

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REACTIVITY OF A MOLYBDENITE CONCENTRATE AGAINST .

A study is made on the reactivity of a molybdenite concentrate (% Mo) in response to chemical attack, using HN03, H2S04 of mixtures or both acids, or to attack by bacteria (mesophiles and moderate or extreme thermophiles). Leaching with sulphuric acid does not attack either of the metallic

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Hydrometallurgical considerations in processing arsenic ...

recovery from leach residue, arsenic capture to residue within the leaching vessel, and, particularly, stability of the final residue. Optimal copper extraction results exceeded 98% in bench work with parallel Pilot results achieving >97% copper recovery to LME Grade .

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Separation of rhenium and molybdenum from molybdenite ...

The molybdenite concentrate is leached with nitric acid and subjected to solvent extraction to recover and separate rhenium and molybdenum from the leached liquor. The effects of pH and the chemicals' concentration on extraction characteristics of Mo and Re are investigated to define the best condition for selective extraction of these metals.

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molybdenite concentrate copper leaching

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