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Ok Tedi Mine
The Ok Tedi Mine is an open-pit copper and gold mine in Papua New Guinea located near the headwaters of the Ok Tedi River, in the Star Mountains Rural LLG of the North Fly District of the Western Province of Papua New Guinea. The mine is operated by Ok Tedi Mining (OTM), which is majority-owned by the PNG Sustainable Development Program Limited (PNGSDPL). In 2013 it was nationalised by the Government of Papua New Guinea in controversial action. Prior to 2002, it was majority owned by BHP Billiton, the largest mining company in the world since a merger in 2001. Located in a remote area of PNG, above on Mount Fubilan, in a region of high rainfall and frequent earthquakes, mine development posed serious challenges. The town of Tabubil was built to serve the mining operation. History Before mining operations, Mount Fubilan was described as a copper mountain with a gold cap. Exploratory drilling in the area began in the 1970s, and was run by the Kennecott Copper Corporation. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bechtel
Bechtel Corporation () is an American engineering, procurement, construction, and project management company founded in San Francisco, California, and headquartered in Reston, Virginia. , the ''Engineering News-Record'' ranked Bechtel as the second largest construction company in the United States. History Founding and early years Bechtel's business activities began in 1898, when cattle farmer Warren A. Bechtel moved from Peabody, Kansas, to the Oklahoma Territory to construct railroads with his team of mules. Bechtel moved his family frequently between construction sites around the western United States for the next several years, eventually moving to Oakland, California, in 1904, where he worked as the superintendent on the Western Pacific Railroad. In 1906, W. A. Bechtel won his first subcontract to build part of the Oroville-to-Oakland section of the Western Pacific Railroad. That year he bought a steam shovel, becoming a pioneer of the new technology. He painted "W.A. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Papua New Guinean Kina
The Kina (ISO 4217 currency code: ''PGK'', the currency symbol: ''K'') is the currency of Papua New Guinea. It is divided into 100 ''toea''. The name ''Kina'' is derived from Kuanua language of the Tolai region, referring to a callable pearl shell used widely for trading in both the Coastal and Highlands areas of the country. History The kina was introduced on 19 May 1975 and circulated along with the Australian dollar until 31 December 1975. The two currencies were equal in value (K1 = A$1). The next day, the dollar ceased to be legal tender in Papua New Guinea. The kina has been a historically stable currency; the economy has never experienced exorbitant rates of monetary inflation. During its early years, the kina experienced an appreciation relative to the Australian dollar, reaching a value of approximately A$1.30 in 1980. The kina reached a peak relative to the Australian dollar in 1986 (K1 = A$1.54). The kina remained stable until 1995, when the country started experi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fly River
The Fly River is the third longest river in the island of New Guinea, after the Sepik River and Mamberamo River, with a total length of and the largest by volume of discharge in Oceania, the largest in the world without a single dam in its catchment, and overall the 20th-largest primary river in the world by discharge volume. It is located in the southwest of Papua New Guinea and Papua Province of Indonesia. It rises in the Victor Emanuel Range arm of the Star Mountains, and crosses the south-western lowlands before flowing into the Gulf of Papua in a large delta. The Fly-Strickland River system has a total length of making it the longest river system of an island in the world, including Strickland River is the longest and largest tributary of Fly River, making it the farthest distance source of the Fly River. Description The Fly flows mostly through the Western Province of Papua New Guinea and for a small stretch, it forms the international boundary with western New Guine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kiunga-Tabubil Highway
The Kiunga-Tabubil Highway is an all-weather gravel road that runs from the river port town of Kiunga through Ningerum and Tabubil to the Ok Tedi Mine site, in the remote North Fly District of the Western Province of Papua New Guinea. The road is around long, but this changes as sections are rehashed. The "highway" was built in the early 1980s. It is maintained by Ok Tedi Mining Limited, who are the greatest beneficiaries of the road. The highway, for the most part, runs parallel with the Ok Tedi River, which is an incredibly fast moving and volatile river since it is a high-volume waterway resting on a sand bank. Parts of the highway are often consumed by the river and need to be rebuilt. The cost of maintaining this road is K1.5 million a year, in a region where people have an average annual income of about K50 a year. In 2019 it was announced that the highway would be sealed over three years by OTML under the government tax credit scheme at an estimated cost of K100 mil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ball Mill
A ball mill is a type of grinder used to grind or blend materials for use in mineral dressing processes, paints, pyrotechnics, ceramics, and selective laser sintering. It works on the principle of impact and attrition: size reduction is done by impact as the balls drop from near the top of the shell. A ball mill consists of a hollow cylindrical shell rotating about its axis. The axis of the shell may be either horizontal or at a small angle to the horizontal. It is partially filled with balls. The grinding media are the balls, which may be made of steel (chrome steel), stainless steel, ceramic, or rubber. The inner surface of the cylindrical shell is usually lined with an abrasion-resistant material such as manganese steel or rubber lining. Less wear takes place in rubber lined mills. The length of the mill is approximately equal to its diameter. The general idea behind the ball mill is an ancient one, but it was not until the industrial revolution and the invention of s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mill (grinding)
A mill is a device, often a structure, machine or kitchen appliance, that breaks solid materials into smaller pieces by grinding, crushing, or cutting. Such comminution is an important unit operation in many processes. There are many different types of mills and many types of materials processed in them. Historically mills were powered by hand or by animals (e.g., via a hand crank), working animal (e.g., horse mill), wind (windmill) or water (watermill). In modern era, they are usually powered by electricity. The grinding of solid materials occurs through mechanical forces that break up the structure by overcoming the interior bonding forces. After the grinding the state of the solid is changed: the grain size, the grain size disposition and the grain shape. Milling also refers to the process of breaking down, separating, sizing, or classifying aggregate material (e.g. mining ore). For instance rock crushing or grinding to produce uniform aggregate size for construction purp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gold Bullion
A gold bar, also called gold bullion or gold ingot, is a quantity of refined metallic gold of any shape that is made by a bar producer meeting standard conditions of manufacture, labeling, and record keeping. Larger gold bars that are produced by pouring the molten metal into molds are called ingots. Smaller bars may be manufactured by minting or stamping from appropriately rolled gold sheets. The standard gold bar held as gold reserves by central banks and traded among bullion dealers is the Good Delivery gold bar. The kilobar, which is in mass, and a 100 troy ounce gold bar are the bars that are more manageable and are used extensively for trading and investment. The premium on these bars when traded is very low over the spot value of the gold, making it ideal for small transfers between banks and traders. Most kilobars are flat, although some investors, particularly in Europe, prefer the brick shape. Types Based upon how they are manufactured, gold bars are categorized as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tonne
The tonne ( or ; symbol: t) is a unit of mass equal to 1000 kilograms. It is a non-SI unit accepted for use with SI. It is also referred to as a metric ton to distinguish it from the non-metric units of the short ton ( United States customary units), and the long ton ( British imperial units). It is equivalent to approximately 2204.6 pounds, 1.102 short tons, and 0.984 long tons. The official SI unit is the megagram (symbol: Mg), a less common way to express the same mass. Symbol and abbreviations The BIPM symbol for the tonne is t, adopted at the same time as the unit in 1879.Table 6 . BIPM. Retrieved on 2011-07-10. Its use is also official for the metric ton in the United States, having been adopted by the United States |
Ok Tedi Environmental Disaster
The Ok Tedi environmental disaster caused severe harm to the environment along of the Ok Tedi River and the Fly River in the Western Province of Papua New Guinea between around 1984 and 2013. The lives of 50,000 people have been disrupted. One of the worst environmental disasters caused by humans, it is a consequence of the discharge of about two billion tons of untreated mining waste into the Ok Tedi from the Ok Tedi Mine, an open pit mine situated in the province. This mining pollution, caused by the collapse of the Ok Tedi tailings dam system in 1984 and the consequent switch to riverine disposal (disposal of tailings directly into the river) for several decades, was the subject of class action litigation brought by local landowners naming Ok Tedi Mining and BHP Billiton. Villagers downstream from Ok Tedi in the Fly River system in the Middle Fly District and the southern and central areas of the North Fly District in particular believe that the effect on their livelih ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inmet Mining
Inmet Mining Corporation was a mining company headquartered in Toronto. In 2013, the company was acquired by First Quantum Minerals. The company held an 18% stake in Ok Tedi Mining Limited. The company had mines in Çayeli, Turkey; Las Cruces, Spain; and Pyhäsalmi, Finland. It was also developing a mine in Cobre Panama, Panama. History The company was founded in 1987. In 1996, the company commissioned the Troilus mill, which began production in 1997. Homestake Mining Company agreed to acquire a majority interest in the mine in 1997 but backed out of the deal. The mine was shut in 2010. In 2003, the company acquired a mine in Turkey from Teck Resources. In April 2004, the company agreed to merge with Aur Resources but the transaction was called off in June 2004. In May 2008, the company took over management of the mine in Petaquilla. In January 2011, Lundin Mining agreed to combine with the company but in March 2011, the deal was called off after failing to win shareholder ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
