copper sulphide minerals

Comparative study on the passivation layers of copper sulphide

Abstract: The bioleaching of copper sulphide minerals was investigated by using A. ferrooxidans ATF6. The result shows the preferential order of the minerals bioleaching as djurleite>bornite>pyritic chalcopyrite>covellite>porphyry chalcopyrite. The residues were characterized by Xray diffraction (XRD) and scanning 

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Copper sulfide ore Mindat

A copper ore where the primary copper ore minerals are sulfides.

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Covellinisation of copper sulphide minerals under pressure leaching

Dec 18, 2017 The formation of copper sulphide (covellite) appeared to be a significant step in the examined pressure leaching process. Copper present in the flotation concentrate was observed to be solubilised in the leaching solution only after the conversion of all copper sulphide minerals into the covellite phase.

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Development of partial extraction methods to estimate abundance of

Jul 19, 2017 Abstract. Studies were conducted by Minera Escondida, Ltda. (MEL) between 1995 and 2003 to support an investment decision to open Escondida Norte, an enriched porphyry copper deposit adjacent to the Escondida mine and processing facilities. Due to the importance of copperiron sulphide minerals 

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Sulfide mineral Britannica

The composition of the sulfide minerals can be expressed with the general chemical formula AmSn, in which A is a metal, S is sulfur, and m and n are integers, giving A2S, AS, A3S4 and AS2 stoichiometries. The metals that occur most commonly in sulfides are iron, copper, nickel, lead, cobalt, silver, and zinc, though about 

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Potential for bioleaching copper sulphide rougher concentrates of

A literature survey on copper bioleaching has indied that secondary sulphide minerals of copper (such as chalcocite, covellite, and bornite) have been demonstrated to show satisfactory bioleach kinetics with mesophilic bacteria4, with several bioheap operations worldwide extracting copper under these conditions1.

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Copper Sulphides: Copper Sulphides mineral information and data.

A generic term often used in petrology and mining to cover any individual or mixture of copper (and copper iron) sulphides.

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Copper NERC Open Research Archive

secondary sulphides, such as chalcocite and covellite, formed from copper leached from nearsurface sulphides. Disseminated copper sulphide deposits dominate global copper production. Estimates suggest at least 90% of copper is derived from sulphide deposits. Of the sulphide minerals, chalcopyrite is by far the most 

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Copper sulfide ore Mindat

A copper ore where the primary copper ore minerals are sulfides.

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CHALCOCITE (Copper Sulfide) Amethyst Galleries

Chalcocite is an important copper mineral ore. It has been mined for centuries and is one of the most profitable copper ores. The reasons for this is its high copper content (67% atomic ratio and nearly 80% by weight) and the ease at which copper can be separated from sulfur. It is not however the primary ore of copper due 

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Comparsion of bioleaching of copper sulphides by Acidithiobacillus

Jan 29, 2014 Bacterial heap leaching of lowgrade copper sulphides is a developing technology. Bioleaching has been applied successfully to the extraction of copper from secondary sulphide minerals, such as chalcocite, at a number of operations worldwide (Watling, 2006). However, heap bioleaching of the refractory 

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Roxbyite, a new copper sulphide mineral from the CiteSeerX

Roxbyite, a new copper sulphide mineral from the Olympic Dam deposit, Roxby Downs,. South Australia. W. G. MUMME, G. J. SPARROW. CSIRO Division of Mineral Chemistry, P.O. Box 124, Port Melbourne, Victoria 3207, Australia. AND. G. S. WALKER. CSIRO, Division of Minerals and Geochemistry, Curtin University of 

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Roxbyite, a new copper sulphide mineral from the Olympic RRuff

Roxbyite, a new copper sulphide mineral from the Olympic Dam deposit, Roxby Downs,. South Australia. W. G. MUMME, G. J. SPARROW. CSIRO. Division of Mineral Chemistry,. P.O. Box 124, Port Melbourne,. Victoria 3207, Australia. G. S. WALKER. AND. CSIRO, Division of Minerals and Geochemistry, Curtin University of 

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an investigation of copper recovery from a sulphide oxide ore with a

Current copper deposits contain significant amounts of secondary nonsulphide minerals and newly discovered deposits are increasingly complex. As a result, research into the improvement of sulphideoxide copper ores processing through the use of mixed collector systems has surged. The flotation of a natural porphyry 

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Copper British Geological Survey

secondary sulphides, such as chalcocite and covellite, formed from copper leached from nearsurface sulphides. Disseminated copper sulphide deposits dominate global copper production. Estimates suggest at least 90% of copper is derived from sulphide deposits. Of the sulphide minerals, chalcopyrite is by far the most 

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Copper sulfide Wikipedia

Copper sulfides describe a family of chemical compounds and minerals with the formula CuxSy. Both minerals and synthetic materials comprise these compounds. Some copper sulfides are economically important ores. Prominent copper sulfide minerals include Cu2S (chalcocite) and CuS (covellite). In the mining industry, 

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Some copper sulphide parageneses from the Raipas formation of

Some copper sulphide parageneses from the Raipas formation of Northern Norway. BY. F. M. VOKES. With 3 plates and 8 textfigures. Contents: Page. Page. Abstract. 74. Copper paragenesis. 81. Introduction. 75. The Ulveryggen deposit. 81. Raipas formation — general geo logy. 77. Gråde of deposit. 82. The ore. 82.

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Bioleaching of different copper sulphide minerals and their

can explain the difference of the bioleaching of four copper sulphide minerals. Conductivity type can interpret the low copper leaching efficiency of chalcopyrite and covellite. However, it cannot explie the high copper leach rate of djurleite and bornite. The decrease of the lag phase of. Acidithiobacillus ferrooxidans with 

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djurleite, a new copper sulphide mineral RRuff

DJURLEITE, A NEW COPPER SULPHIDE MINERAL. NOBUO MORIMOTO. Mineralogical Department, University of Tokyo. ABSTRACT. Djurleite, a new copper sulphide of or about Cu1.96S composition, is de scribed. Chalcocitelike materials from several localities in Japan and in. U. S. A. are identified as the new phase 

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Copper Ore Types: Sulfides vs. Oxides Investing News Network

Apr 20, 2017 Coppercontaining rock, or copper ore, holds only a small percentage of copper. Most of the rock is unwanted material, typically referred to as gangue. There are two main copper ore types of interest: copper oxide ores and copper sulfide ores. Both ore types can be economically mined, though they are 

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The bioleaching of sulphide minerals with emphasis on copper

This review outlines current research in heap bioleaching, particularly in respect of the bioleaching of chalcopyrite, assesses the status of the bioprocessing of copper sulphides and evaluates promising developments. The bioleaching of sulphide minerals is reviewed with emphasis on the contribution from the microbial 

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Flotation of mixed copper oxide and sulphide minerals Axis House

Sherwood Copper's Minto Mine processes a high grade copper–gold deposit in Yukon, Canada. The ore mined is from a primary copper sulphide deposit with separate additional deposits of copper oxides. In conjunction with Ausmelt Chemicals, Minto is currently investigating options to recover copper oxide and sulphide 

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List Sulphide Minerals 911 Metallurgist

Color, copperred or brownish, usually tarnished with a variety of colors, often very brilliant powder, grayish black luster, metallic H = 3 G = 4.9 to 5.4 composition, copper, iron and sulphur in variable proportions, with copper from 44% to 71% cleavage, almost absent.

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US3896208A HCl Treatment of copper sulfide minerals Google

A hydrometallurigical process featuring treating sulfide metal concentrate with hydrochloric acid or hydrogen chloride gas and an oxygenbearing gas (air or oxygen) in an aqueous medium to recover metal from said sulfide metal concentrate is disclosed.

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Copper Sulphides: Copper Sulphides mineral information and data.

A generic term often used in petrology and mining to cover any individual or mixture of copper (and copper iron) sulphides.

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Covellinisation of copper sulphide minerals under pressure leaching

The formation of copper sulphide (covellite) appeared to be a significant step in the examined pressure leaching process. Copper present in the flotation concentrate was observed to be solubilised in the leaching solution only after the conversion of all copper sulphide minerals into the covellite phase. Permeable 

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Flotation of a copper sulphide ore from Okiep Semantic Scholar

Introduction. Thiol collectors are used in the froth flotation of copper sulphide ores. The xanthates, dithio phosphates and dithiocarbamates are classes of thiol collectors that each form different surface products on different copper sulphide minerals. It has been shown that the use of mixtures of thiol collectors can have 

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The Mineral Gallery Sulfides Class Amethyst Galleries

The Sulfide Class minerals comprise an economically important class of minerals. Most major ores of important metals such as copper, lead and silver are sulfides. Strong generalities exist in this class. The majority of sulfides are metallic, opaque, generally sectile, soft to average in hardness and they have high densities, 

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