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Tojiri Line
The Tojiri Line is a non-electrified secondary railway line of the Korean State Railway in Namp'o Special City, North Korea, from Namp'o on the P'yŏngnam Line to Tojiri.Kokubu, Hayato, 将軍様の鉄道 (Shōgun-sama no Tetsudō) Services The line was built to serve the Namp'o Smelting Complex, which processed nonferrous metals, shipping gold, zinc, coarse and refined copper Copper is a chemical element with the symbol Cu (from la, cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkis ..., copper wire and chemical fertilisers. It received ore and concentrates from mines at Taedae-ri and Suan. Route A yellow background in the "Distance" box indicates that section of the line is not electrified. References Railway lines in North Korea Standard gauge railways in North Korea {{NorthKorea-rail-transport-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Passenger Rail Terminology
Various terms are used for passenger railway lines and equipment; the usage of these terms differs substantially between areas: Rapid transit A rapid transit system is an electric railway characterized by high speed (~) and rapid acceleration. It uses passenger railcars operating singly or in multiple unit trains on fixed rails. It operates on separate rights-of-way from which all other vehicular and foot traffic are excluded (i.e. is fully grade-separated from other traffic). It uses sophisticated signaling systems, and high platform loading. Originally, the term ''rapid transit'' was used in the 1800s to describe new forms of quick urban public transportation that had a right-of-way separated from street traffic. This set rapid transit apart from horsecars, trams, streetcars, omnibuses, and other forms of public transport. A variant of the term, ''mass rapid transit (MRT)'', is also used for metro systems in Southeast Asia and Taiwan. Though the term was almost alway ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Korea
North Korea, officially the Democratic People's Republic of Korea (DPRK), is a country in East Asia. It constitutes the northern half of the Korea, Korean Peninsula and shares borders with China and Russia to the north, at the Yalu River, Yalu (Amnok) and Tumen River, Tumen rivers, and South Korea to the south at the Korean Demilitarized Zone. North Korea's border with South Korea is a disputed border as both countries claim the entirety of the Korean Peninsula. The country's western border is formed by the Yellow Sea, while its eastern border is defined by the Sea of Japan. North Korea, like South Korea, its southern counterpart, claims to be the legitimate government of the entire peninsula and List of islands of North Korea, adjacent islands. Pyongyang is the capital and largest city. In 1910, Korean Empire, Korea was Korea under Japanese rule, annexed by the Empire of Japan. In 1945, after the Surrender of Japan, Japanese surrender at the End of World War II in Asia, end ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper
Copper is a chemical element with the symbol Cu (from la, cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins, and constantan used in strain gauges and thermocouples for temperature measurement. Copper is one of the few metals that can occur in nature in a directly usable metallic form ( native metals). This led to very early human use in several regions, from circa 8000 BC. Thousands of years later, it was the first metal to be smelted from sulfide ores, circa 5000 BC; the first metal to be cast into a shape in a mold, c. 4000 BC; and the first metal to be purposely alloyed with another metal, tin, to create ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blister Copper
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 Inco f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zinc
Zinc is a chemical element with the symbol Zn and atomic number 30. Zinc is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodic table. In some respects, zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size.The elements are from different metal groups. See periodic table. Zinc is the 24th most abundant element in Earth's crust and has five stable isotopes. The most common zinc ore is sphalerite (zinc blende), a zinc sulfide mineral. The largest workable lodes are in Australia, Asia, and the United States. Zinc is refined by froth flotation of the ore, roasting, and final extraction using electricity ( electrowinning). Zinc is an essential trace element for humans, animals, plants and for microorganisms and is necessary for prenatal and postnatal development. It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gold
Gold is a chemical element with the symbol Au (from la, aurum) and atomic number 79. This makes it one of the higher atomic number elements that occur naturally. It is a bright, slightly orange-yellow, dense, soft, malleable, and ductile metal in a pure form. Chemically, gold is a transition metal and a group 11 element. It is one of the least reactive chemical elements and is solid under standard conditions. Gold often occurs in free elemental ( native state), as nuggets or grains, in rocks, veins, and alluvial deposits. It occurs in a solid solution series with the native element silver (as electrum), naturally alloyed with other metals like copper and palladium, and mineral inclusions such as within pyrite. Less commonly, it occurs in minerals as gold compounds, often with tellurium (gold tellurides). Gold is resistant to most acids, though it does dissolve in aqua regia (a mixture of nitric acid and hydrochloric acid), forming a soluble tetrachloroaurate anion. Gold is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nonferrous Metal
In metallurgy, non-ferrous metals are metals or alloys that do not contain iron (allotropes of iron, ferrite, and so on) in appreciable amounts. Generally more costly than ferrous metals, non-ferrous metals are used because of desirable properties such as low weight (e.g. aluminium), higher conductivity (e.g. copper), non-magnetic properties or resistance to corrosion (e.g. zinc). Some non-ferrous materials are also used in the iron and steel industries. For example, bauxite is used as flux for blast furnaces, while others such as wolframite, pyrolusite, and chromite are used in making ferrous alloys. Important non-ferrous metals include aluminium, copper, lead, tin, titanium, and zinc, and alloys such as brass. Precious metals such as gold, silver, and platinum and exotic or rare metals such as mercury, tungsten, beryllium, bismuth, cerium, cadmium, niobium, indium, gallium, germanium, lithium, selenium, tantalum, tellurium, vanadium, and zirconium are also non-ferrous. They ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nampo Smelting Complex
The Namp'o Smelting Complex was a smelter in Hadaedu-dong, Hanggu-guyŏk, Namp'o Special City, North Korea. Prior to closure, it employed over 700 workers. It was a comprehensive nonferrous metal production facility including smelters for gold, copper and zinc, other metal rolling and alloy production, smelting by-products, and chemical fertiliser production. In 1997, annual production capacity was 15,000 tons of blister copper, 5,500 tons of refined copper, 7,000 tons of copper wire, 28,000 tons of zinc, and 5,000 tons of lime fertiliser. Concentrates and ores were received from the mines at Taedae-ri and Suan. The facility was served by the Korean State Railway via Tojiri on the Tojiri Line. History The Chinnampo Smelter was originally opened in stages between 1913 and 1915 as a privately owned company during the Japanese colonial era. Destroyed during the Pacific War The Pacific War, sometimes called the Asia–Pacific War, was the theater of World War II that wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Railway
Rail transport (also known as train transport) is a means of transport that transfers passengers and goods on wheeled vehicles running on rails, which are incorporated in tracks. In contrast to road transport, where the vehicles run on a prepared flat surface, rail vehicles (rolling stock) are directionally guided by the tracks on which they run. Tracks usually consist of steel rails, installed on sleepers (ties) set in ballast, on which the rolling stock, usually fitted with metal wheels, moves. Other variations are also possible, such as "slab track", in which the rails are fastened to a concrete foundation resting on a prepared subsurface. Rolling stock in a rail transport system generally encounters lower frictional resistance than rubber-tyred road vehicles, so passenger and freight cars (carriages and wagons) can be coupled into longer trains. The operation is carried out by a railway company, providing transport between train stations or freight customer facilit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nampo
Nampo (North Korean official spelling: Nampho; ), also spelled Namp'o, is the second largest city by population and an important seaport in North Korea, which lies on the northern shore of the Taedong River, 15 km east of the river's mouth. Formerly known as Chinnamp'o, it was a provincial-level "Directly Governed City" ("Chikhalsi") from 1980 to 2004, and was designated a "Special City" ("T'ŭkpyŏlsi", 특별시; 特別市) in 2010. Nampo is approximately 50 km southwest of Pyongyang, at the mouth of the Taedong River. Since North Korean independence, the city has developed a wide range of industry and has seen significant recent redevelopment. History Before formation of North Korea The city belonged to Gojoseon until the Three Kingdoms era, when it was taken by Goguryeo. During this time, the city was part of Sogyong (now Pyongyang) until the Goryeo dynasty, when in the aftermath of the Myocheong rebellion, Sogyong was split into six counties, of which curre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taedong River
The Taedong River (Chosŏn'gŭl: ) is a large river in North Korea. The river rises in the Rangrim Mountains of the country's north where it then flows southwest into Korea Bay at Namp'o.Suh, Dae-Sook (1987) "North Korea in 1986: Strengthening the Soviet Connection" ''Asian Survey'' 27(1): pp. 56-63, page 62 In between, it runs through the country's capital, Pyongyang. Along the river are landmarks such as the Juche Tower and Kim Il-sung Square. The river is 439 km or 272.7 mi in length, and is generally deep. It is the fifth-longest river on the Korean peninsula and the second-longest in North Korea. Pyongyang is approximately 110 km upstream from the mouth, Sunchon 192 km upstream, and Taehŭng 414 km upstream. Because of its depth, it is widely used for river transport; it is navigable by large ships up to 65 km inland, although most commercial traffic stops at Songrim. History The kingdom of Koguryo was founded on its shores. Many archeological sites d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyongnam Line
The P'yŏngnam Line is an electrified standard-gauge trunk line of the Korean State Railway in North Korea, linking P'yŏngyang with the port city of Namp'o and the hot springs at P'yŏngnam Onch'ŏn. The length of the line is .Kokubu, Hayato, 将軍様の鉄道 (Shōgun-sama no Tetsudō), The P'yŏngnam Line serves as a connection between the various trunk lines starting at P'yŏngyang that serve the north and east of the country with the lines in the southwestern part of North Korea by means of a connection to the Sŏhae Kammun Line (West Sea Barrage Line). It connects to the Ryonggang Line and the Taean Line,The traffic and geography in North KoreaP'yŏngnam Line accessed 14 December 2017. (in Korean) as well as to the P'yŏngyanghwajŏn Line, the Chamjilli Line, the Posan Line, the Tojiri Line, the Namp'o Port Line, and, formerly, the Namdong Line. History The P'yŏngnam Line was originally built as two separate lines by two separate railway companies - the P'yŏng ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
