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Ducktown, Tennessee
Ducktown ( chr, ᎦᏬᏅᏱ, translit=Gawonvyi) is a city in Polk County, Tennessee, United States. The population was 461 at the 2020 census and 475 at the 2010 census. It is included in the Cleveland Metropolitan Statistical Area. History Ducktown is located in a geological region known as the Copper Basin, and was the center of a major copper-mining district from 1847 until 1987. The district also produced iron, sulfur and zinc as byproducts. Ducktown was the birthplace of Rockabilly Hall of Famer, Stan Beaver. Literary historian Ben Harris McClary suggests that a Ducktown-area farmer named William "Sut" Miller (d. 1858) was the inspiration for the George Washington Harris character, Sut Lovingood. Ducktown and several Ducktown-area features, such as Big Frog Mountain and the Ocoee River ("Oconee"), are mentioned in the Sut Lovingood tales. The pre-mining period The Cherokee inhabited the Copper Basin as early as the late 18th century, well before the arrival of the f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
City
A city is a human settlement of notable size.Goodall, B. (1987) ''The Penguin Dictionary of Human Geography''. London: Penguin.Kuper, A. and Kuper, J., eds (1996) ''The Social Science Encyclopedia''. 2nd edition. London: Routledge. It can be defined as a permanent and densely settled place with administratively defined boundaries whose members work primarily on non-agricultural tasks. Cities generally have extensive systems for housing, transportation, sanitation, utilities, land use, production of goods, and communication. Their density facilitates interaction between people, government organisations and businesses, sometimes benefiting different parties in the process, such as improving efficiency of goods and service distribution. Historically, city-dwellers have been a small proportion of humanity overall, but following two centuries of unprecedented and rapid urbanization, more than half of the world population now lives in cities, which has had profound consequences for g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stan Beaver
Stan or STAN may refer to: People * Stan (given name), a list of people with the given name ** Stan Laurel (1890–1965), English comic actor, part of duo Laurel and Hardy * Stan (surname), a Romanian surname * Stan! (born 1964), American author, cartoonist and games designer Steven Brown * Stan (singer) (born 1987), Greek singer born Stratos Antipariotis Arts and entertainment Fictional characters * Stan, an alligator in the 2006 Disney animated film ''The Wild'' * Grunkle Stan, in the animated TV series ''Gravity Falls'' * Stan, in the 2009 American fantasy comedy movie '' 17 Again'' * Stan, from the film ''Crawl'' * Stan Beeman, in the TV series ''The Americans'' * Stan Carter, in the British soap opera ''EastEnders'' * Stan Edgar, in the Amazon Prime Video series ''The Boys'' * Stan Gable, in the ''Revenge of the Nerds'' film series played by Ted McGinley * Stan Marsh, in the animated TV series ''South Park'' * Stan Ogden, in the British soap opera ''Coronation Street'' * Stan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Froth Flotation
Froth flotation is a process for selectively separating hydrophobic materials from hydrophilic. This is used in mineral processing, paper recycling and waste-water treatment industries. Historically this was first used in the mining industry, where it was one of the great enabling technologies of the 20th century. It has been described as "the single most important operation used for the recovery and upgrading of Sulfide#Geology, sulfide ores". The development of froth flotation has improved the recovery of valuable minerals, such as copper- and lead-bearing minerals. Along with mechanized mining, it has allowed the economic recovery of valuable metals from much lower grade ore than previously. Industries Froth flotation is applied to a wide range of separations. An estimated 1B tons of materials are processed in this manner annually. Mineral processing Froth flotation is a process for separating minerals from gangue by exploiting differences in their hydrophobicity. Hydrophob ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulfuric Acid
Sulfuric acid (American spelling and the preferred IUPAC name) or sulphuric acid ( Commonwealth spelling), known in antiquity as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen and hydrogen, with the molecular formula . It is a colorless, odorless and viscous liquid that is miscible with water. Pure sulfuric acid does not exist naturally on Earth due to its strong affinity to water vapor; it is hygroscopic and readily absorbs water vapor from the air. Concentrated sulfuric acid is highly corrosive towards other materials, from rocks to metals, since it is an oxidant with powerful dehydrating properties. Phosphorus pentoxide is a notable exception in that it is not dehydrated by sulfuric acid, but to the contrary dehydrates sulfuric acid to sulfur trioxide. Upon addition of sulfuric acid to water, a considerable amount of heat is released; thus the reverse procedure of adding water to the acid should not be performed since the heat released may boi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulfur
Sulfur (or sulphur in British English) is a chemical element with the symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S8. Elemental sulfur is a bright yellow, crystalline solid at room temperature. Sulfur is the tenth most abundant element by mass in the universe and the fifth most on Earth. Though sometimes found in pure, native form, sulfur on Earth usually occurs as sulfide and sulfate minerals. Being abundant in native form, sulfur was known in ancient times, being mentioned for its uses in ancient India, ancient Greece, China, and ancient Egypt. Historically and in literature sulfur is also called brimstone, which means "burning stone". Today, almost all elemental sulfur is produced as a byproduct of removing sulfur-containing contaminants from natural gas and petroleum.. Downloahere The greatest commercial use of the element is the production o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copperhill, Tennessee
Copperhill is a city in Polk County, Tennessee, United States. The population was 443 at the 2020 census. It is included in the Cleveland Metropolitan Statistical Area. History Copperhill is located in a geological region known as the Copper Basin, which was the site of a major copper mining operation between the 1840s and 1987. Starting around the time of the Civil War, the production method for removing the Sulphur from the copper ore mined in the area required building bonfires, throwing in the ore, and burning off the Sulphur. This necessitated cutting most of the trees in the valley for the bonfires. The acid rain caused by the burning of the Sulphur inhibited additional vegetation from growing, and the topsoil consequently washed off the hilly terrain due to lack of vegetation to hold it. Though acid plants were later built to convert the Sulphur into a useful product, the result of the earlier activities was that for years, up until the 1980s, the area was denuded of an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Refining (metallurgy)
In metallurgy, refining consists of purifying an impure metal. It is to be distinguished from other processes such as smelting and calcining in that those two involve a chemical change to the raw material, whereas in refining, the final material is usually identical chemically to the original one, only it is purer. The processes used are of many types, including pyrometallurgy, pyrometallurgical and hydrometallurgy, hydrometallurgical techniques. Lead Cupellation One ancient process for extracting the silver from lead was cupellation. Lead was melted in a bone ash 'test' or 'cupel' and air blown across the surface. This oxidised the lead to litharge, and also oxidised other base metals present, the silver (and gold if present) remaining unoxidised. In the 18th century, the process was carried on using a kind of reverberatory furnace, but differing from the usual kind in that air was blown over the surface of the molten lead from bellows or (in the 19th century) blowing cyl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smelter
Smelting is a process of applying heat to ore, to extract a base metal. It is a form of extractive metallurgy. It is used to extract many metals from their ores, including Silver mining#Ore processing, silver, iron-making, iron, copper extraction, copper, and other base metals. Smelting uses heat and a chemical reducing agent to decompose the ore, driving off other elements as gases or slag and leaving the metal base behind. The reducing agent is commonly a fossil fuel source of carbon, such as coke (fuel), coke—or, in earlier times, charcoal. The oxygen in the ore binds to carbon at high temperatures due to the Chemical energy, lower potential energy of the bonds in carbon dioxide (). Smelting most prominently takes place in a blast furnace to produce pig iron, which is converted into steel. The carbon source acts as a chemical reactant to remove oxygen from the ore, yielding the purified metal Chemical element, element as a product. The carbon source is oxidized in two stage ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Native Copper
Native copper is an uncombined form of copper that occurs as a natural mineral. Copper is one of the few metallic elements to occur in native form, although it most commonly occurs in oxidized states and mixed with other elements. Native copper was an important ore of copper in historic times and was used by pre-historic peoples. Native copper occurs rarely as isometric cubic and octahedral crystals, but more typically as irregular masses and fracture fillings. It has a reddish, orangish, and/or brownish color on fresh surfaces, but typically is weathered and coated with a green tarnish of copper(II) carbonate (also known as patina or verdigris). Its specific gravity is 8.9 and its hardness is 2.5–3. The mines of the Keweenaw native copper deposits of Upper Michigan were major copper producers in the 19th and early 20th centuries, and are the largest deposits of native copper in the world. (Web archive; click cancel when it asks for authentication.) Native Americans mined ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ducktown Train
Ducktown may refer to: * Ducktown, Georgia, an unincorporated community *Ducktown, Tennessee Ducktown ( chr, ᎦᏬᏅᏱ, translit=Gawonvyi) is a city in Polk County, Tennessee, United States. The population was 461 at the 2020 census and 475 at the 2010 census. It is included in the Cleveland Metropolitan Statistical Area. History Duc ..., a city * Ducktown, Atlantic City, district of Atlantic City, New Jersey {{geodis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Treaty Of New Echota
The Treaty of New Echota was a treaty signed on December 29, 1835, in New Echota, Georgia, by officials of the United States government and representatives of a minority Cherokee political faction, the Treaty Party. The treaty established terms for the Cherokee Nation to cede its territory in the southeast and move west to the Indian Territory. Although the treaty was not approved by the Cherokee National Council nor signed by Principal Chief John Ross, it was amended and ratified in March 1836, and became the legal basis for the forcible removal known as the Trail of Tears. Background Early discussions By the late 1820s, the territory of the Cherokee Indian nation lay almost entirely in northwestern Georgia, with small parts in Tennessee, Alabama, and North Carolina. It extended across most of the northern border and all of the border with Tennessee. An estimated 16,000 Cherokee people lived in this territory. Others had emigrated west to present-day Texas and Arkansas. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cherokee
The Cherokee (; chr, ᎠᏂᏴᏫᏯᎢ, translit=Aniyvwiyaʔi or Anigiduwagi, or chr, ᏣᎳᎩ, links=no, translit=Tsalagi) are one of the indigenous peoples of the Southeastern Woodlands of the United States. Prior to the 18th century, they were concentrated in their homelands, in towns along river valleys of what is now southwestern North Carolina, southeastern Tennessee, edges of western South Carolina, northern Georgia, and northeastern Alabama. The Cherokee language is part of the Iroquoian language group. In the 19th century, James Mooney, an early American ethnographer, recorded one oral tradition that told of the tribe having migrated south in ancient times from the Great Lakes region, where other Iroquoian peoples have been based. However, anthropologist Thomas R. Whyte, writing in 2007, dated the split among the peoples as occurring earlier. He believes that the origin of the proto-Iroquoian language was likely the Appalachian region, and the split betw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
