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Skorpion Zinc
Skorpion Zinc is a zinc mine in the ǁKaras Region of southern Namibia, producing Special High Grade (SHG) zinc. The mine is situated near Rosh Pinah. It was established at a cost of US$450 million by Anglo American in 2003. It is the tenth-largest zinc mine in the world, and the largest employer in Rosh Pinah, providing 1,900 jobs. Skorpion is a unique mine in several ways. Firstly, it is a supergene zinc ore body composed of alluvial accumulations of zinc carbonate and silicate minerals of detrital nature deposited within a palaeochannel. There are no other currently commercially viable deposits of this type. It is also one of the few mines in the world that currently mines zinc oxides, a mixture of non-sulphidic zinc minerals such as smithsonite, hydrozincite, tarbuttite and willemite. Finally, it is the only zinc processing facility to use solvent extraction-electrowinning metallurgy to process and refine its zinc products (others using conventional smelting and roasting). ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rosh Pinah
Rosh Pinah is a mining town located in southern Namibia, close to the border with South Africa. It is situated south of Keetmanshoop in Namibia's ǁKaras Region. West of the town lies Sperrgebiet, Diamond Area 1, the main diamond mining area of Namibia. Rosh Pinah belongs to the Oranjemund Constituency, Oranjemund electoral constituency. The town is connected via road to Aus, Namibia, Aus and Oranjemund. Copper was discovered here in the 1920s, and in 1963 German-born Jew Mose Kohan discovered zinc in the nearby Hunz Mountains in 1963. He also coined the name "Rosh Pinah" which is a Hebrew term for "cornerstone".Tonchi, Victor L., William A. Lindeke, and John J. Grotpeter"Rosh Pinah Mine"Historical Dictionary of Namibia. 2nd edition. (2012) Toronto: The Scarecrow Press, Inc, p. 373. More significant deposits of zinc were found in 1968. Rosh Pinah is home to two mines, Skorpion Zinc and Rosh Pinah mine. Both mines extract mainly zinc and lead. Like other mining towns in Namibia, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solvent Extraction-electrowinning
Solvent extraction and electrowinning (SX/EW) is a two-stage hydrometallurgical process that first extracts and upgrades copper ions from low-grade leach solutions into a solvent containing a chemical that selectively reacts with and binds the copper in the solvent. The copper is extracted from the solvent with strong aqueous acid which then deposits pure copper onto cathodes using an electrolytic procedure (electrowinning). SX/EW processing is best known for its use by the copper industry, where it accounts for 20% of worldwide production, but the technology is also successfully applied to a wide range of other metals including cobalt, nickel, zinc and uranium Uranium is a chemical element with the symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium is weak .... References * * * Metallurgical processes {{Industry-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2003 Establishments In Namibia
3 (three) is a number, numeral and digit. It is the natural number following 2 and preceding 4, and is the smallest odd prime number and the only prime preceding a square number. It has religious or cultural significance in many societies. Evolution of the Arabic digit The use of three lines to denote the number 3 occurred in many writing systems, including some (like Roman and Chinese numerals) that are still in use. That was also the original representation of 3 in the Brahmic (Indian) numerical notation, its earliest forms aligned vertically. However, during the Gupta Empire the sign was modified by the addition of a curve on each line. The Nāgarī script rotated the lines clockwise, so they appeared horizontally, and ended each line with a short downward stroke on the right. In cursive script, the three strokes were eventually connected to form a glyph resembling a with an additional stroke at the bottom: ३. The Indian digits spread to the Caliphate in the 9th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Economic Geology
Economic geology is concerned with earth materials that can be used for economic and/or industrial purposes. These materials include precious and base metals, nonmetallic minerals and construction-grade stone. Economic geology is a subdiscipline of the geosciences; according to Lindgren (1933) it is “the application of geology”. Today, it may be called the scientific study of the Earth's sources of mineral raw materials and the practical application of the acquired knowledge. The term commonly refers to metallic mineral deposits and mineral resources. The techniques employed by other earth science disciplines (such as geochemistry, mineralogy, geophysics, petrology, paleontology and structural geology) might all be used to understand, describe, and exploit an ore deposit. Economic geology is studied and practiced by geologists. Economic geology may be of interest to other professions such as engineers, environmental scientists, and conservationists because of the far-reachi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lead And Zinc Mines In Namibia
Lead is a chemical element with the symbol Pb (from the Latin ) and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and also has a relatively low melting point. When freshly cut, lead is a shiny gray with a hint of blue. It tarnishes to a dull gray color when exposed to air. Lead has the highest atomic number of any stable element and three of its isotopes are endpoints of major nuclear decay chains of heavier elements. Lead is toxic, even in small amounts, especially to children. Lead is a relatively unreactive post-transition metal. Its weak metallic character is illustrated by its amphoteric nature; lead and lead oxides react with acids and bases, and it tends to form covalent bonds. Compounds of lead are usually found in the +2 oxidation state rather than the +4 state common with lighter members of the carbon group. Exceptions are mostly limited to organolead compounds. Like the lighter members of the group, lea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surface Mines In Namibia
A surface, as the term is most generally used, is the outermost or uppermost layer of a physical object or space. It is the portion or region of the object that can first be perceived by an observer using the senses of sight and touch, and is the portion with which other materials first interact. The surface of an object is more than "a mere geometric solid", but is "filled with, spread over by, or suffused with perceivable qualities such as color and warmth". The concept of surface has been abstracted and formalized in mathematics, specifically in geometry. Depending on the properties on which the emphasis is given, there are several non equivalent such formalizations, that are all called ''surface'', sometimes with some qualifier, such as algebraic surface, smooth surface or fractal surface. The concept of surface and its mathematical abstraction are both widely used in physics, engineering, computer graphics, and many other disciplines, primarily in representing the surfaces ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mining In Namibia
Mining is the biggest contributor to Namibia's economy in terms of revenue. It accounts for 25% of the country's income. Its contribution to the gross domestic product (10.4% in 2009, 8.5% in 2010, 9.5% in 2011, 12.3% in 2012, 13.2% in 2013, 11.6% in 2014) is also very important and makes it one of the largest economic sectors of the country. Namibia produces diamonds, uranium, copper, magnesium, zinc, silver, gold, lead, semi-precious stones and industrial minerals.KPMG (2014). Namibia. Country Mining Guide'. KPMG INTERNATIONAL. p.3 The majority of revenue (7.2% of GDP in 2011) comes from diamond mining. In 2014, Namibia was the fourth-largest exporter of non-fuel minerals in Africa. Overview Namibia has a long tradition of mining. In 2018, mining contributed 14% of GDP and expanded 28%. Extensive exploration in Namibia for base metals, diamonds, gold, natural gas, and uranium has been attributed, in part, to the rise in world commodity prices. Under the Mining Act, the natural ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rosh Pinah Mine
The Rosh Pinah mine is a mine near Rosh Pinah in the ǁKaras Region of southern Namibia. It is one of the largest and most important lead and zinc mines in Namibia. The mine is located in the extreme southwest, about north of the Orange River and 50 kilometers east of the Atlantic. The mine is owned by Trevali Mining Corporation since 2017. History German-born Jew Mose Kohan discovered zinc in the nearby Hunz Mountains in 1963. He also coined the name "Rosh Pinah" which is a Hebrew term for "cornerstone".Tonchi, Victor L., William A. Lindeke, and John J. Grotpeter"Rosh Pinah Mine"Historical Dictionary of Namibia. 2nd edition. (2012) Toronto: The Scarecrow Press, Inc, p. 373. The mine has been in continuous operation since 1969. Glencore acquired 50.04% ownership of the mine in 2011 and increased its stake shortly thereafter to 80.08%. The remainder of the shares were owned by Black Economic Empowerment (BEE) actors ''PE Minerals'', owned by Aaron Mushimba, ''Jaguar Investm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Care And Maintenance
Care and maintenance is a term used in the mining industry to describe processes and conditions on a closed minesite where there is potential to recommence operations at a later date. During a care and maintenance phase, production is stopped but the site is managed to ensure it remains in a safe and stable condition. Causes The mine might be considered to be temporarily unviable, due to current economic conditions or unfavourable resource prices, which are expected to improve at a later date. Declining ore grades at some mines can also be a reason for care and maintenance announcements. In some cases controlling interest companies decide not to further funding for subsidiary operations. During closure While the mine is closed, a care and maintenance program will manage environmental risks associated with tailings dumps, hazardous materials and open and underground pits. Care of idle plant and machinery will also be included in the program. Public health and safety consideratio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smelting
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, iron, 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—or, in earlier times, charcoal. The oxygen in the ore binds to carbon at high temperatures due to the 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 element as a product. The carbon source is oxidized in two stages. First, the carbon (C) combusts with oxygen (O2) in the air to produce carbon monoxide (CO). Second, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alluvial
Alluvium (from Latin ''alluvius'', from ''alluere'' 'to wash against') is loose clay, silt, sand, or gravel that has been deposited by running water in a stream bed, on a floodplain, in an alluvial fan or beach, or in similar settings. Alluvium is also sometimes called alluvial deposit. Alluvium is typically geologically young and is not consolidated into solid rock. Sediments deposited underwater, in seas, estuaries, lakes, or ponds, are not described as alluvium. Floodplain alluvium can be highly fertile, and supported some of the earliest human civilizations. Definitions The present consensus is that "alluvium" refers to loose sediments of all types deposited by running water in floodplains or in alluvial fans or related landforms. However, the meaning of the term has varied considerably since it was first defined in the French dictionary of Antoine Furetière, posthumously published in 1690. Drawing upon concepts from Roman law, Furetière defined ''alluvion'' (the F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Regions Of Namibia
Namibia uses regions as its first-level subnational administrative divisions. Since 2013, it has 14 regions which in turn are subdivided into 121 constituencies. Upon Namibian independence, the pre-existing subdivisions from the South African administration were taken over. Since then, demarcations and numbers of regions and constituencies of Namibia are tabled by delimitation commissions and accepted or declined by the National Assembly. In 1992, the ''1st Delimitation Commission'', chaired by Judge President Johan Strydom, proposed that Namibia should be divided into 13 regions. The suggestion was approved in the lower house, The National Assembly. In 2014, the ''4th Delimitation Commission'' amended the number of regions to fourteen. Regions 1990–1992 See also *Constituencies of Namibia Each of the 14 regions of Namibia is further subdivided into electoral constituencies. The size of the constituencies varies with the size and population of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
