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Zinc Mining
Zinc mining is the process by which mineral forms of the metal zinc are extracted from the earth through mining. A zinc mine is a mine that produces zinc minerals in ore as its primary product. Common co-products in zinc ores include minerals of lead and silver. Other mines may produce zinc minerals as a by-product of the production of ores containing more valuable minerals or metals, such as gold, silver or copper. Mined ore is processed, usually on site, to produce one or more metal-rich Ore concentrate, concentrates, then transported to a zinc smelting, zinc smelter for production of zinc metal. Global zinc mine production in 2020 was estimated to be 12 million tonnes. The largest producers were China (35%), Mining in Australia, Australia (12%), Mineral industry of Peru, Peru (10%), Mining in India, India (6.0%), Zinc mining in the United States, United States (5.6%) and Mexico (5.0%), with Australia having the largest Mineral resource classification#Mineral reserves and ore res ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zinkgruvan Zink Mine Sweden 001
Zinkgruvan is a locality situated in Askersund Municipality, Örebro County, Sweden. It had 391 inhabitants in 2010. It is situated close to Sweden's second largest lake, Vättern. The village is famous for its mining industry started by the Belgian company Vieille Montagne in 1857, hence the name Zinkgruvan (literally "the zinc mine" in English). Zinkgruvan was founded around the mine in the 1860s, and the history of the village is closely tied to the history of the mine. The people living in Zinkgruvan are mostly mine workers. Zinkgruvan also contains several ski facilities, including an illuminated cross country ski track. The ski association in Zinkgruvan uses snow cannons to ensure that the ski-track is provided with snow during the entire winter. An old ice hockey rink in the village is filled with ice in the winter for public entertainment. Zinkgruvan is home to a museum that documents the history of the mining industry in the town. Riksdag elections Zinkgruvan is formi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glencore
Glencore plc is an Anglo-Swiss Multinational corporation, multinational commodity trading and mining company with headquarters in Baar, Switzerland, Baar, Switzerland. Glencore's oil and gas headquarters are in London, London, England as well as its primary listing being on the London Stock Exchange, and it is one of the largest components of the FTSE 100 Index, FTSE 100 by market capitalization. Its registered office is in Saint Helier, Jersey, a Crown Dependencies, Crown Dependency of the United Kingdom. By some estimates, it is the world's largest commodity trader, and among the world's largest companies. The company was formed in 1994 by a management buyout of Marc Rich + Co AG (itself founded in 1974). The company merged with Xstrata in 2013, increasing its size substantially. Before that, the company was already one of the world's largest integrated producers and marketers of commodities. It was the largest company in Switzerland as well as the world's largest commodities ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnesium
Magnesium is a chemical element; it has Symbol (chemistry), symbol Mg and atomic number 12. It is a shiny gray metal having a low density, low melting point and high chemical reactivity. Like the other alkaline earth metals (group 2 of the periodic table), it occurs naturally only in combination with other elements and almost always has an oxidation state of +2. It reacts readily with air to form a thin Passivation (chemistry), passivation coating of magnesium oxide that inhibits further corrosion of the metal. The free metal burns with a brilliant-white light. The metal is obtained mainly by electrolysis of magnesium Salt (chemistry), salts obtained from brine. It is less dense than aluminium and is used primarily as a component in strong and lightweight magnesium alloy, alloys that contain aluminium. In the cosmos, magnesium is produced in large, aging stars by the sequential addition of three Helium nucleus, helium nuclei to a carbon nucleus. When such stars explo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aluminium
Aluminium (or aluminum in North American English) is a chemical element; it has chemical symbol, symbol Al and atomic number 13. It has a density lower than that of other common metals, about one-third that of steel. Aluminium has a great affinity towards oxygen, passivation (chemistry), forming a protective layer of aluminium oxide, oxide on the surface when exposed to air. It visually resembles silver, both in its color and in its great ability to reflect light. It is soft, magnetism, nonmagnetic, and ductility, ductile. It has one stable isotope, 27Al, which is highly abundant, making aluminium the abundance of the chemical elements, 12th-most abundant element in the universe. The radioactive decay, radioactivity of aluminium-26, 26Al leads to it being used in radiometric dating. Chemically, aluminium is a post-transition metal in the boron group; as is common for the group, aluminium forms compounds primarily in the +3 oxidation state. The aluminium cation Al3+ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galvanization
Galvanization ( also spelled galvanisation) is the process of applying a protective zinc coating to steel or iron, to prevent rusting. The most common method is hot-dip galvanizing, in which the parts are coated by submerging them in a bath of hot, molten zinc. Protective action The zinc coating, when intact, prevents corrosive substances from reaching the underlying iron. It's main function is to act as a sacrificial anode to prevent the iron from rusting by cathodic protection. Zinc is more reactive than iron, so the zinc coating preferentially oxidizes to zinc carbonate, preventing the iron from corroding, even if there are gaps in the zinc coating. Additional electroplating such as a chromate conversion coating may be applied to provide further surface passivation to the substrate material. History and etymology The process is named after the Italian physician, physicist, biologist and philosopher Luigi Galvani (9 September 1737 – 4 December 1798). The earliest kno ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zinc Oxide
Zinc oxide is an inorganic compound with the Chemical formula, formula . It is a white powder which is insoluble in water. ZnO is used as an additive in numerous materials and products including cosmetics, Zinc metabolism, food supplements, rubbers, plastics, ceramics, glass, cement, lubricants, paints, sunscreens, ointments, adhesives, sealants, pigments, foods, batteries, ferrites, fire retardants, semi conductors, and first-aid tapes. Although it occurs naturally as the mineral zincite, most zinc oxide is produced synthetically. History Early humans probably used zinc compounds in processed and unprocessed forms, as paint or medicinal ointment; however, their composition is uncertain. The use of ''pushpanjan'', probably zinc oxide, as a salve for eyes and open wounds is mentioned in the Indian medical text the Charaka Samhita, thought to date from 500 BC or before. Zinc oxide ointment is also mentioned by the Greek physician Dioscorides (1st century AD). Galen suggested treatin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brass
Brass is an alloy of copper and zinc, in proportions which can be varied to achieve different colours and mechanical, electrical, acoustic and chemical properties, but copper typically has the larger proportion, generally copper and zinc. In use since prehistoric times, it is a substitutional alloy: atoms of the two constituents may replace each other within the same crystal structure. Brass is similar to bronze, a copper alloy that contains tin instead of zinc. Both bronze and brass may include small proportions of a range of other Chemical element, elements including arsenic, lead, phosphorus, aluminium, manganese and silicon. Historically, the distinction between the two alloys has been less consistent and clear, and increasingly museums use the more general term "list of copper alloys, copper alloy". Brass has long been a popular material for its bright gold-like appearance and is still used for drawer pulls and door handle, doorknobs. It has also been widely used to ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Before Present
Before Present (BP) or "years before present (YBP)" is a time scale used mainly in archaeology, geology, and other scientific disciplines to specify when events occurred relative to the origin of practical radiocarbon dating in the 1950s. Because the "present" time changes, standard practice is to use 1January 1950 as the commencement date (epoch) of the age scale, with 1950 being labelled as the "standard year". The abbreviation "BP" has been interpreted retrospectively as "Before Physics", which refers to the time before nuclear weapons testing artificially altered the proportion of the carbon isotopes in the atmosphere, which scientists must account for when using radiocarbon dating for dates of origin that may fall after this year. In a convention that is not always observed, many sources restrict the use of BP dates to those produced with radiocarbon dating; the alternative notation "RCYBP" stands for the explicit "radio carbon years before present". Usage The BP scale is s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rajasthan
Rajasthan (; Literal translation, lit. 'Land of Kings') is a States and union territories of India, state in northwestern India. It covers or 10.4 per cent of India's total geographical area. It is the List of states and union territories of India by area, largest Indian state by area and the List of states and union territories of India by population, seventh largest by population. It is on India's northwestern side, where it comprises most of the wide and inhospitable Thar Desert (also known as the Great Indian Desert) and shares a border with the Pakistani provinces of Punjab, Pakistan, Punjab to the northwest and Sindh to the west, along the Sutlej-Indus River valley. It is bordered by five other Indian states: Punjab, India, Punjab to the north; Haryana and Uttar Pradesh to the northeast; Madhya Pradesh to the southeast; and Gujarat to the southwest. Its geographical location is 23°3' to 30°12' North latitude and 69°30' to 78°17' East longitude, with the Tropic of Can ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
China Minmetals
China Minmetals Corporation is a Chinese state-owned enterprise headquartered in Beijing. It is one of the largest metal and mineral trading companies in the world, operating in more than 30 countries across mining, metal trading, engineering, and investment. Corporate Affairs China Minmetals is under the supervision of the State-owned Assets Supervision and Administration Commission (SASAC) of the State Council. The company owns and controls a number of major subsidiaries, including: * China Metallurgical Group Corporation (CMGC): a major engineering and mining enterprise, fully merged into Minmetals in 2015. CMGC operates commercially through its publicly listed arm, Metallurgical Corporation of China Limited (MCC), which was established in 2008 and listed on both the Shanghai Stock Exchange and Hong Kong Stock Exchange in 2009. MCC carries out the majority of the group’s construction, engineering, and mining projects both in China and internationally. * Minmetals Devel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boliden AB
Boliden AB (stylized as Boliden) is a Swedish multinational metals, mining, and smelting company headquartered in Stockholm. The company produces zinc, copper, lead, nickel, silver, and gold, with operations in Sweden, Finland, Norway, Portugal, and Ireland. The company name comes from the Boliden mine, 30 km northwest of the Swedish town of Skellefteå, where gold was found in 1924. It was once Europe's largest and richest gold mine, but has since 1967 been defunct. The goods produced are sold both to the group's own smelters and to external customers. Boliden owns and operates Europe's biggest zinc mine at Tara in Ireland (since early 2004), but production began there in 1977, since when over 60 million tonnes of ore have been mined. Boliden also owns Garpenberg, which is Sweden's oldest mine still in operation. Mining at Garpenberg, or extracting metals from the ground, began as early as 375 bc. The mineral-rich Skellefte field lies within the Boliden Area, where almo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
