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Copper Extraction Techniques
Copper extraction refers to the methods used to obtain copper from its ores. The conversion of copper consists of a series of physical and electrochemical processes. Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other factors. As in all mining operations, the ore must usually be beneficiated (concentrated). The processing techniques depend on the nature of the ore. If the ore is primarily sulfide copper minerals (such as chalcopyrite), the ore is crushed and ground to liberate the valuable minerals from the waste ('gangue') minerals. It is then concentrated using mineral flotation. The concentrate is typically sold to distant smelters, although some large mines have smelters located nearby. Such colocation of mines and smelters was more typical in the 19th and early 20th centuries, when smaller smelters could be economic. The sulfide concentrates are typically smelted in such furnaces as the Outokumpu or Inc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chino Copper Mine
Chino or El Chino may refer to: Art, entertainment, and media * ''Chino'' (1973 film), an Italian film starring Charles Bronson * ''Chino'' (1991 film), a Nepali film Places * Chino, California, a city in San Bernardino County, California, USA * Chino, Nagano, a city in Nagano prefecture, Japan * Chino Hills, a mountain range on the border of Orange, Los Angeles, and San Bernardino counties, California * Chino Hills, California, a city in San Bernardino County, California, USA * Chino Valley, Arizona, a town in Yavapai County, Arizona, USA People People nicknamed "Chino" * Chino Cadahia (born 1957), Cuban baseball coach * Chino Herrera (1903–1983), Mexican actor and comedian * Chino Moreno (born 1973), American musician * Chino Pozo (1915–1980), Cuban drummer * David Rheem, US poker player * Chino Roque (born 1990), was a space cadets * Javi Chino (born 1987), Spanish footballer * Chino Smith (1903–1932), Negro league baseball player * Jesús Alberto Miranda P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulfur Dioxide
Sulfur dioxide (IUPAC-recommended spelling) or sulphur dioxide (traditional Commonwealth English) is the chemical compound with the formula . It is a toxic gas responsible for the odor of burnt matches. It is released naturally by volcanic activity and is produced as a by-product of copper extraction and the burning of sulfur- bearing fossil fuels. Structure and bonding SO2 is a bent molecule with ''C''2v symmetry point group. A valence bond theory approach considering just ''s'' and ''p'' orbitals would describe the bonding in terms of resonance between two resonance structures. The sulfur–oxygen bond has a bond order of 1.5. There is support for this simple approach that does not invoke ''d'' orbital participation. In terms of electron-counting formalism, the sulfur atom has an oxidation state of +4 and a formal charge of +1. Occurrence Sulfur dioxide is found on Earth and exists in very small concentrations and in the atmosphere at about 1 ppm. On other planets, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Evolution Minerai Cuivre
Evolution is change in the heritable characteristics of biological populations over successive generations. These characteristics are the expressions of genes, which are passed on from parent to offspring during reproduction. Variation tends to exist within any given population as a result of genetic mutation and recombination. Evolution occurs when evolutionary processes such as natural selection (including sexual selection) and genetic drift act on this variation, resulting in certain characteristics becoming more common or more rare within a population. The evolutionary pressures that determine whether a characteristic is common or rare within a population constantly change, resulting in a change in heritable characteristics arising over successive generations. It is this process of evolution that has given rise to biodiversity at every level of biological organisation, including the levels of species, individual organisms, and molecules. The theory of evolution by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bronze Age
The Bronze Age is a historic period, lasting approximately from 3300 BC to 1200 BC, characterized by the use of bronze, the presence of writing in some areas, and other early features of urban civilization. The Bronze Age is the second principal period of the three-age system proposed in 1836 by Christian Jürgensen Thomsen for classifying and studying ancient societies and history. An ancient civilization is deemed to be part of the Bronze Age because it either produced bronze by smelting its own copper and alloying it with tin, arsenic, or other metals, or traded other items for bronze from production areas elsewhere. Bronze is harder and more durable than the other metals available at the time, allowing Bronze Age civilizations to gain a technological advantage. While terrestrial iron is naturally abundant, the higher temperature required for smelting, , in addition to the greater difficulty of working with the metal, placed it out of reach of common use until the end o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper Age
The Copper Age, also called the Chalcolithic (; from grc-gre, χαλκός ''khalkós'', "copper" and ''líthos'', "stone") or (A)eneolithic (from Latin '' aeneus'' "of copper"), is an archaeological period characterized by regular human manipulation of copper, but prior to the discovery of bronze alloys. Modern researchers consider the period as a subset of the broader Neolithic, but earlier scholars defined it as a transitional period between the Neolithic and the Bronze Age. The archaeological site of Belovode, on Rudnik mountain in Serbia, has the world's oldest securely dated evidence of copper smelting at high temperature, from (7000 BP). The transition from Copper Age to Bronze Age in Europe occurred between the late 5th and the late In the Ancient Near East the Copper Age covered about the same period, beginning in the late and lasting for about a millennium before it gave rise to the Early Bronze Age. Terminology The multiple names result from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rudna Glava (archaeological Site)
Rudna Glava () is a mining site in present-day eastern Serbia that demonstrates one of the earliest evidences of European copper mining and metallurgy, dating to the 5th millennium BC. Shafts were cut into the hillside, with scaffolding constructed for easy access to the veins of ore. It belongs to the Vinča culture, as is shown by pottery-finds. In 1983, Rudna Glava was added to the Archaeological Sites of Exceptional Importance list, protected by Republic of Serbia. See also * Archaeological Sites of Exceptional Importance Sources and external links * Borislav Jovanović, Rudna Glava, najstarije rudarstvo bakra na centralnom Balkanu. Bor, Muzej rudarstva i metallurgije/Beograd, Arheološki institut 1982. * J. P. Mallory and Martin E. Huld, "Metal", ''Encyclopedia of Indo-European Culture An encyclopedia (American English) or encyclopædia (British English) is a reference work or compendium providing summaries of knowledge either general or special to a particular field o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serbia
Serbia (, ; Serbian language, Serbian: , , ), officially the Republic of Serbia (Serbian language, Serbian: , , ), is a landlocked country in Southeast Europe, Southeastern and Central Europe, situated at the crossroads of the Pannonian Basin and the Balkans. It shares land borders with Hungary to the north, Romania to the northeast, Bulgaria to the southeast, North Macedonia to the south, Croatia and Bosnia and Herzegovina to the west, and Montenegro to the southwest, and claims a border with Albania through the Political status of Kosovo, disputed territory of Kosovo. Serbia without Kosovo has about 6.7 million inhabitants, about 8.4 million if Kosvo is included. Its capital Belgrade is also the List of cities in Serbia, largest city. Continuously inhabited since the Paleolithic Age, the territory of modern-day Serbia faced Slavs#Migrations, Slavic migrations in the 6th century, establishing several regional Principality of Serbia (early medieval), states in the early Mid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pločnik (archaeological Site)
Pločnik is an archaeological site in the village of the same name in Toplica District, Serbia. A 120 hectare settlement belonging to the Neolithic Vinča culture existed on the site from 5500 BCE until it was destroyed by fire in 4700 BCE. The site was first discovered during railway construction in 1927, but was investigated only sporadically until excavations carried out by the Prokuplje Museum the National Museum of Serbia began in 1996. The Vinča houses at Pločnik had stoves and special holes specifically for rubbish, and the dead were buried in cemeteries. People slept on woollen mats and fur and made clothes of wool, flax and leather. The figurines found not only represent deities but many show the daily life of the inhabitants while crude pottery finds appear to have been made by children. Women are depicted in short tops and skirt wearing jewellery. A thermal well found near the settlement might be evidence of Europe's oldest spa. The preliminary dating of a Pločnik me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Timna Valley
The Timna Valley (תִּמְנָע, ) is located in southern Israel in the southwestern Arava/Arabah, approximately north of the Gulf of Aqaba and the city of Eilat. The area is rich in copper ore and has been mined since the 5th millennium BCE. There is controversy whether the mines were active during the biblical united Kingdom of Israel and its second ruler, King Solomon. A large section of the valley, containing ancient remnants of copper mining and ancient worship, is encompassed in a recreation park. Ramon Airport is located near the entrance to the Timna Valley. History Copper mining Copper has been mined in the area since the 6th or 5th millennium BCE. Archaeological excavation indicates that the copper mines in Timna Valley were probably part of the Kingdom of Edom and worked by the Edomites, described as biblical foes of the Israelites, during the 10th century BCE, the period of biblical King Solomon. Mining continued by the Israelites and Nabataeans through to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shanidar Cave
Shanidar Cave ( ku, Zewî Çemî Şaneder ,ئەشکەوتی شانەدەر, ) is an archaeological site located on Bradost Mountain, within the Zagros Mountains, in the Erbil Governorate of Kurdistan Region in northern Iraq. It is known for the discovery of Neanderthal remains at the site, most notably Shanidar 1, who survived several injuries during his life, possibly due to care from others in his group, and Shanidar 4, the famed 'flower burial'."Shanidar Cave." ''Shanidar Cave , Unbelievable Kurdistan – Official Tourism Site of Kurdistan'', http://bot.gov.krd/erbil-province-mirgasor/history-and-heritage/shanidar-cave Until this discovery, Cro-Magnons, the earliest known ''H. sapiens'' in Europe, were the only individuals known for purposeful, ritualistic burials. Archaeology The site, 1/2 mile from the Great Zab river and near Rowanduz, lies at 2100 feet above sea level. The cave entrance is triangular, 82 feet wide by 26 high. Its dimensions are, at maximum, 175 feet wide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anatolia
Anatolia, tr, Anadolu Yarımadası), and the Anatolian plateau, also known as Asia Minor, is a large peninsula in Western Asia and the westernmost protrusion of the Asian continent. It constitutes the major part of modern-day Turkey. The region is bounded by the Turkish Straits to the northwest, the Black Sea to the north, the Armenian Highlands to the east, the Mediterranean Sea to the south, and the Aegean Sea to the west. The Sea of Marmara forms a connection between the Black and Aegean seas through the Bosporus and Dardanelles straits and separates Anatolia from Thrace on the Balkan peninsula of Southeast Europe. The eastern border of Anatolia has been held to be a line between the Gulf of Alexandretta and the Black Sea, bounded by the Armenian Highlands to the east and Mesopotamia to the southeast. By this definition Anatolia comprises approximately the western two-thirds of the Asian part of Turkey. Today, Anatolia is sometimes considered to be synonymous with Asian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Çayönü
Çayönü Tepesi is a Neolithic settlement in southeastern Turkey which prospered from circa 8,630 to 6,800 BC. It is located forty kilometres north-west of Diyarbakır, at the foot of the Taurus mountains. It lies near the Boğazçay, a tributary of the upper Tigris River and the Bestakot, an intermittent stream. It is an early example of agriculture. Archaeology The site was excavated for 16 seasons between 1964 and 1991, initially by Robert John Braidwood and Halet Çambel and later by Mehmet Özdoğan and Aslı Erim Özdoğan. The settlement covers the periods of the Pre-Pottery Neolithic A (PPNA), the Pre-Pottery Neolithic B (PPNB), and the Pottery Neolithic (PN). The stratigraphy is divided into the following subphases according to the dominant architecture: *round, PPNA *grill, PPNA *channeled, Early PPNB *cobble paved, Middle PPNB *cell, Late PPNB *large room, final PPNB An analysis of blood found at the site suggested that human sacrifice occurred there. Origin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
