Copper pyrites - definition of copper pyrites by The Free Dictionary
a common mineral, copper iron sulfide, CuFeS2, occurring in brass-yellow crystals or masses: the most important ore of copper; copper pyrites. ... atomic number 29, copper, Cu - a ductile malleable reddish-brown corrosion-resistant diamagnetic metallic element; occurs in various minerals but is the only metal that occurs...Read More
Chalcopyrite - Wikipedia
Chalcopyrite is the most important copper ore. Chalcopyrite ore occurs in a variety of ore types, from huge masses as at Timmins, Ontario, to irregular veins and disseminations associated with granitic to dioritic intrusives as in the porphyry copper deposits of Broken Hill, the American cordillera and the Andes. The largest...Read More
List of copper ores - Wikipedia
Following is a list of minerals that serve as copper ores in the copper mining process: Name, Formula, % Copper when pure. Min chalcopyrite.jpg. Chalcopyrite. CuFeS2. 34.5. Chalcocite.jpg · Chalcocite · Cu2S. 79.8. Covellite-USA.jpg · Covellite · CuS. 66.5. Bornite.jpg · Bornite. 2Cu2S·CuS·FeS. 63.3. Tetraedrite.jpg.Read More
Copper pyrites | Define Copper pyrites at Dictionary.com
It has the refulgency of copper pyrites, of gold, of Florentine bronze. The Glow-Worm and Other Beetles Jean Henri Fabre. The copper pyrites found in Cornwall are sulphuret of copper. The Mosaic History of the Creation of the World Thomas Wood. copper pyrites is also used in the Harz, as well as in Swansea and Glasgow...Read More
copper pyrites - Dictionary Definition : Vocabulary.com
Word Family. copper pyrites. the "copper pyrites" family. Usage Examples. All SourcesFictionArts / CultureNewsBusinessSportsScience / MedTechnology. Beat with a stone on copper pyrites, and it immediately begins to crumble. Various. This ore is often found mixed with iron or copper pyrites, and sometimes with blende.Read More
Copper ores - Danafloat
Copper ores. The main copper sulphide minerals are chalcopyrite (CuFeS2) chalcocite (Cu2S), covellite (CuS), bornite (Cu5FeS4), tetrahedrite ((Cu,Fe)12Sb4S13) and enargite (Cu3AsS4). The largest source of copper is from porphyry ore deposits in which one or a combination of the aforementioned minerals occurs.Read More
Copper mining. From ore to copper. - School Science
Part of an interactive on-line booklet about copper mining explaining the early, physical stages in the process. ... much less energy is use than in traditional mining; no waste gases are given off; it can be used on ores with as little as 0.1% copper - for this reason, leaching ... Chalcopyrite, CuFeS2, Golden yellow, metallic. 35...Read More
The Extraction of Copper - Chemistry LibreTexts
Jun 11, 2017 ... The concentrated ore is heated strongly with silicon dioxide (silica) and air or oxygen in a furnace or series of furnaces. The copper(II) ions in the chalcopyrite are reduced to copper(I) sulfide (which is reduced further to copper metal in the final stage). The iron in the chalcopyrite ends up converted into an...Read More
METALLURGY OF COPPER-EXTRACTION OF COPPER-BLISTER ...
Cu(OH)2]. Bornite (3Cu2S.Fe2S3) or peacock ore. Melaconite (CuO) etc. EXTRACTION OF COPPER FROM SULPHIDE ORE. Large amount of copper are obtained from copper pyrite (CuFeS2) by smelting. Ores containing ... The finely crushed ore is suspended in water containing a little amount of pine oil. A blast of air is...Read More
Copper-pyrites - Encyclopedia - Theodora.com
COPPER-PYRITES, or Chalcopyrite, a copper iron sulphide (CuFeS2), an important ore of copper. The name copper-pyrites is from the Ger. Kupferkies, which was used as far back as 1546 by G. Agricola; chalcopyrite (from XaXK6s, " copper," and pyrites) was proposed by J. F. Henckel in his Pyritologia, oder Kiess-Historie...Read More
Chalcopyrite - an overview | ScienceDirect Topics
Copper is widely distributed in the environment; present mainly in minerals as sulphides, oxides, or carbonates, with the major ores being chalcopyrite (CuFeS2), chalcocite (Cu2S), cuprite (Cu2O), and malachite (Cu2CO3(OH)2). Copper was the first metal to be worked by human societies and is thought to have been...Read More
Copper Flotation - Chemistry@Elmhurst - Elmhurst College
The copper ore slurry from the grinding mills is mixed with milk of lime (simply water and ground-up limestone) to give a basic pH, pine oil (yes, it comes from trees -- a by-product of ... Raising the pH causes the polar end to ionize more and to preferentially stick to chalcopyrite (CuFeS2) and leave the pyrite (FeS2) alone.Read More
Chalcopyrite and pyrite floatabilities in the presence of sodium ...
One of the principal problems in flotation of copper complex ores is the presence of pyrite and copper-activated pyrite in moderately alkaline pHs. Misreported pyrite into copper concentrates dramatically declines copper grade and its recovery. In this study, the effect of sodium sulfide, sodium metabisulfite (SMBS), and their...Read More
University of Minnesota's Mineral Pages: Chalcopyrite
Our primary source of copper, chalcopyrite's name comes from the Greek words 'chalkos' and 'pyrites', which respectively mean 'copper' and 'striking fire'. With its metallic luster and bright golden color, chalcopyrite can fool people into thinking it is gold. It is one of two minerals, the other being pyrite, that are commonly...Read More
Chalcopyrite - Physical Properties & Healing Properties - Kidz Rocks
As an ore of copper, the yield of chalcopyrite is rather low in terms of atoms per molecule. It is only 25%, compared to other copper minerals such as chalcocite, Cu2S - 67%; cuprite, Cu2O - 67%; covellite, CuS - 50% or bornite Cu5FeS4 - 50%. However the large quantities and widespread distribution of chalcopyrite make it...Read More
EXTRACTION OF COPPER
COPPER. Copper pyrite or chalcopyrite (CuFeS2). Chalocite (Cu2S) or copper glance. Malachite green [CuCO3.Cu(OH)2]. Azurite blue [2CuCO3.Cu(OH)2]. ... Large amount of copper are obtained from copper pyrite (CuFeS2) by smelting. Ores ... The finely crushed ore is concentrated by Froth-Floatation process. The finely.Read More
Lecture 20 Smelting Contents Preamble Matte smelting What is ...
What is Slag. Industrial copper smelting. Exercise is matte smelting. References. Key words: Matte smelting, Flash smelting ,Reduction smelting. Preamble. Smelting is a unit ... which is an intermediate product in the extraction of copper from sulphide ores. ... 1) a) In a copper ore chalcopyrite is 34%, Pyrite 30%and SiO 36%.Read More
Extraction of Copper from Malanjkhand Low-Grade Ore by Bacillus ...
Jan 26, 2011 ... Bacillus stearothermophilus is a thermophilic heterotrophic bacterium isolated from hot water spring, Atri, Orissa, India. This bacterium was adapted to low-grade chalcopyrite ore and its efficiency to solubilize copper from Malanjkhand low-grade ore was determined. The low-grade copper ore contains...Read More
Chalcopyrite: Chalcopyrite mineral information and data. - Mindat.org
Chalcopyrite Group . Chalcopyrite-Eskebornite Series . A major ore of copper. Common in sulfide veins and disseminated in igneous rocks. Weathering may lead to the formation of malachite , azurite , brochantite , langite and numerous other secondary copper minerals. A Zn-rich variety is known from Atlantis II Deep (see...Read More
Chalcopyrite: The mineral chalcopyrite information and pictures
Detailed description, properties, and locality information guide about the copper ore mineral chalcopyrite. ... "Peacock Ore" which is sold to many amateur mineral collectors often as a variety of Bornite, is in fact almost always Chalcopyrite treated with acid to produce an iridescent tarnish. Though some Chalcopyrite is...Read More
How copper is made - material, used, processing, steps, product ...
Most of the copper ores mined in the United States contain only about 1.2-1.6% copper by weight. The most common sulfide ore is chalcopyrite, CuFeS 2 , also known as copper pyrite or yellow copper ore. Chalcocite, Cu 2 S, is another sulfide ore. Cuprite, or red copper ore, Cu 2 O, is an oxide ore. Malachite, or green...Read More
depression of pyrite in the flotation of copper ores - Research ...
flotation of iron sulphides is caused by their copper activation from copper species dissolved from copper minerals present in the ore. In this study, several methods were used to reduce copper activation of pyrite during grinding or to minimise its effect on the flotation of pyrite at pH 9.0. Various surface analytical techniques...Read More
20.1 Metal Deposits | Physical Geology - BC Open Textbooks
Looking at copper, for example, we can see that while average rock has around 40 ppm (parts per million) of copper, a grade of around 10,000 ppm or 1% is .... The important ore minerals include chalcopyrite (CuFeS2), bornite (Cu5FeS4), and pyrite in copper porphyry deposits, or molybdenite (MoS2) and pyrite in...Read More
The Chalcocite and Native Copper Types of Ore ... - GeoScienceWorld
COPPER TYPES. OF ORE DEPOSITS. EDSON. S. BASTIN. IN certain types of copper deposits the metal is present largely in the form of native copper or chalcocite, and chalcopyrite and pyrite, so common in most -copper deposits, are absent or rare. Expressed in chemical terms this means relative richness in cop- per and...Read More
All About Chalcopyrite - - ICMJ's Prospecting and Mining Journal
I thought it might be worthwhile to take a look at a very important copper mineral, chalcopyrite. It is the most widespread and important ore mineral for copper, producing half of all the newly mined copper. There are loads of different copper minerals, but a large number of them form first in the ground as chalcopyrite and then...Read More
Mining history of Cyprus - Copper mines | Euromines
The mining industry of Cyprus was active in the production of minerals of copper, iron pyrite, gold, chromites as well as asbestos fibers. Since 1979 the mining industry of Cyprus is in recession because of the exhaustion of the known large and rich copper and iron pyrite ore bodies and the increase of the production cost...Read More
Gold - Mine Engineer
Gold occurs in association with ores of copper and lead, in quartz veins, in the gravel of stream beds, and with pyrites (iron sulfide). Seawater contains astonishing quantities of gold, but the process of recovery is not economical. The distribution of gold seems to validate the theory that gold was carried toward the Earth's...Read More
Copper Ore - Manufacturers & Suppliers of Tanbe Ka Ayask
Currently, the most common source of copper ore is the mineral chalcopyrite (CuFeS2), which accounts for about 50% of copper production. The focus of this article is on the process of copper extraction from chalcopyrite ore into pure metal. Processes for more.. Triveni Chemicals. G. I. D. C., VapiNo. 135, Pancharatna Char...Read More
Copper in the Crust of the Earth - Waldorf Library
In this connection it is interesting to study how the metals, embedded in their ores, are distributed in the different kinds of rock and in the different regions. Tin has the ... A well-known site for this kind of copper ore, where copper pyrites appear in the black bituminous marly slate, is Mansfeld, to the East of the Harz. But copper...Read More
Minerals, elements and the Earth's crust
Sulfur (pyrite is not used as an ore of iron). Making sulfuric acid. Chalcopyrite. CuFeS2. Copper x 1. Iron x 1. Sulfur x 2. Copper. Plumbing pipes and electrical wires. Coinage. Chalcocite. Cu2S. Copper x 2. Sulfur x 1. Copper. Plumbing pipes and electrical wires. Coinage. Bauxite. Al2O3. Aluminium x 2. Oxygen x 3.Read More
Copper production & environmental impact - GreenSpec
Confounding the imminent 'peak copper' argument is the fact that continually discovered reserves combined with increasing efficiency of extraction means that, ... Sulfide Ore. The dried copper concentrates are sent to the smelting operation where it is reduced and melted in several operations. At the end of this smelting...Read More
SYNONYMS OF MINERALS
This page contains the synonyms for many common minerals or rocks, or in some cases, both.Read More
A Petrographic and Mineragraphic Study of the Copper-Bearing ...
The main ore—mineral was found to be chalcocite, occurring together with lesser amounts of digenite, bornite, chalcopyrite, covellite, pyrite, cuprite, native copper, malachite, azurite, chrysocolla, and iron ores. Although silver is consistently encountered in assays of the ore, no silver mineral could be detected using an ore-.Read More
Types of Ore | MiningHallOfFame.org
In contrast, rock that is not judged to contain economic quantities of an element is categorized as waste rock. The metals in ore can occur in many different minerals (compounds) in the rock. As an example, copper occurs in more than 50 minerals with varying percentages of copper in the chemical formulas of those minerals...Read More
KGS--Bull. 223, part 2--Mineralogy of Copper Sulfides, Lower ...
Jun 30, 2009 ... Although two spatially distinct and separate sulfide assemblages are identified on the basis of drill hole information, the sequence of ore minerals indicates that a descending copper-rich solution percolating downward was slowly depleted of its copper content. In the northern portion of the area, pyrite is...Read More
Pyrite | Earth Sciences Museum | University of Waterloo
Uses: An important ore of copper. In Sudbury, Ontario, chalcopyrite is mined for it's platinum content. Ornamental stone; Collector stone. Chalcopyrite vs. Gold. If you were to rub the mineral vigorously with a hard object then if pyrite it will give off a sulphurous smell (like rotten eggs) but if gold no odour will be apparent.Read More
Processing copper-porphyritic ore - SRK Consulting
The porphyritic ore features the tight intergrowth of sulfide minerals, and different sizes of sulfide ... If molybdenite flotation is required to separate it from copper sulfides, the pH should be no more than 11 to provide pyrite depression, and lime is added with a small amount of cyanide and soluble silica is used to suppress...Read More
Role of starch and metabisuphite on pure pyrite and pyritic copper ...
Mar 12, 2015 ... Full-text (PDF) | Depression of pyrite is very important in sulphide ore flotation. This paper investigates the role of non-toxic depressants on the flotation of pyrite. Starch and meta bisulphite were used as a depressant for pure pyrite sample and a pyritic copper ore at two different pHs values...Read More
Developing a Bulk Circuit Suitable for Chalcopyrite-Pyrite Ores with ...
depressants (lime and NaCN) is evident under these conditions. Information from literature has shown that the reagent consumption can be minimized by the configuration of the flowsheet. A simpler flotation circuit with lower operating and capital costs for treatment of such copper-gold- pyrite ores with an elevated pyrite...Read More
CHALCOPYRITE: The World's Most Important Ore of Copper for ...
Apr 20, 2017 ... Chalcopyrite is a brassy yellow mineral with the chemical composition CuFeS2, or copper iron sulfide. It is found in most sulfide mineral deposits around the world. Chalcopyrite loses its surface metallic luster and brass-yellow color when it weathers, changing to a dull, gray-green color. When acids are...Read More