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Dairi Mine
The Dairi mine is a zinc and lead mine in the Dairi Regency of the North Sumatra province of Indonesia. It is owned by Dairi Prima Mineral, which obtained a permit to explore the area in 1988 and started drilling in 1997. The largest of the ore bodies is 26.7 million tons, reportedly estimated by the mining company as comprising 7% lead and 12% zinc. Location and description The underground mine is located near the Sopokomil hamlet of Longkotan d/small> village in the Silima Pungga-Pungga d/small> subdistrict of Dairi Regency, in the North Sumatra province on the island of Sumatra, in Western Indonesia. The location is 25 kilometres west-northwest of Sidikalang, the capital town of Dairi Regency. The mine sits on the Great Sumatran fault line. The earthquake-prone land around the mine is unstable because it is composed of ash from the local volcanoes. Stanford University civil engineer Richard Meehan said that the mine's design is "almost certain" to result in a dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dairi Regency
Dairi Regency is a regency on the west shore of Lake Toba in North Sumatra, Indonesia. The regency covers an area of square kilometres and it had a population of 269,848 people at the 2010 Census and 308,764 at the 2020 Census.Badan Pusat Statistik, Jakarta, 2021. Its seat is at the town of Sidikalang. Geography and climate Dairi is mostly hills and mountains, averaging above sea level. It has a tropical rainforest climate, with the heaviest rainfall between September and May. Dairi is bordered on its north by Southeast Aceh and Karo, to its south by Pakpak Bharat, to its east by Toba, and to its west by South Aceh. Demographics A 2008 estimate by the Dairi government put Dairi's population at 271,983, with a sex ratio of 99.43. Of the population, 39.96% is under the age of 14. At the 2010 Census the population was 269,848, and at the 2020 Census it was 308,764. Administrative districts Dairi Regency is divided into fifteen districts (''kecamatan''), tabulated below ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sidikalang
Sidikalang is a town in North Sumatra province of Indonesia and it is the seat (capital) of Dairi Regency Dairi Regency is a regency on the west shore of Lake Toba in North Sumatra, Indonesia. The regency covers an area of square kilometres and it had a population of 269,848 people at the 2010 Census and 308,764 at the 2020 Census.Badan Pusat Statis .... * Climate Notable people * Bonar Sianturi (1944–2022), former Regent of Sintang (1989–1994) References Populated places in North Sumatra Regency seats of North Sumatra {{NSumatra-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lead And Zinc Mines In Indonesia
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 t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World Bank
The World Bank is an international financial institution that provides loans and grants to the governments of low- and middle-income countries for the purpose of pursuing capital projects. The World Bank is the collective name for the International Bank for Reconstruction and Development (IBRD) and International Development Association (IDA), two of five international organizations owned by the World Bank Group. It was established along with the International Monetary Fund at the 1944 Bretton Woods Conference. After a slow start, its first loan was to France in 1947. In the 1970s, it focused on loans to developing world countries, shifting away from that mission in the 1980s. For the last 30 years, it has included NGOs and environmental groups in its loan portfolio. Its loan strategy is influenced by the Sustainable Development Goals as well as environmental and social safeguards. , the World Bank is run by a president and 25 executive directors, as well as 29 various vic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Finance Corporation
The International Finance Corporation (IFC) is an international financial institution that offers investment, advisory, and asset-management services to encourage private-sector development in less developed countries. The IFC is a member of the World Bank Group and is headquartered in Washington, D.C. in the United States. It was established in 1956, as the private-sector arm of the World Bank Group, to advance economic development by investing in for-profit and commercial projects for poverty reduction and promoting development. The IFC's stated aim is to create opportunities for people to escape poverty and achieve better living standards by mobilizing financial resources for private enterprise, promoting accessible and competitive markets, supporting businesses and other private-sector entities, and creating jobs and delivering necessary services to those who are poverty stricken or otherwise vulnerable. Since 2009, the IFC has focused on a set of development goals t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compliance Advisor/Ombudsman
The Office of the Compliance Advisor/Ombudsman (CAO) is a recourse mechanism for projects supported by the International Finance Corporation (IFC) and Multilateral Investment Guarantee Agency (MIGA) of the World Bank Group. It was established in 1999 and is based in Washington, D.C. ) , image_skyline = , image_caption = Clockwise from top left: the Washington Monument and Lincoln Memorial on the National Mall, United States Capitol, Logan Circle, Jefferson Memorial, White House, Adams Morgan, ... Mission The Mission of the CAO is to address complains of people affected by IFC and MIGA projects, and to improve the accountability of both institutions References External links * {{international-org-stub World Bank Organizations established in 1999 Ombudsman organizations Consumer organizations in the United States 1999 establishments in Washington, D.C. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tailings
In mining, tailings are the materials left over after the process of separating the valuable fraction from the uneconomic fraction ( gangue) of an ore. Tailings are different to overburden, which is the waste rock or other material that overlies an ore or mineral body and is displaced during mining without being processed. The extraction of minerals from ore can be done two ways: placer mining, which uses water and gravity to concentrate the valuable minerals, or hard rock mining, which pulverizes the rock containing the ore and then relies on chemical reactions to concentrate the sought-after material. In the latter, the extraction of minerals from ore requires comminution, i.e., grinding the ore into fine particles to facilitate extraction of the target element(s). Because of this comminution, tailings consist of a slurry of fine particles, ranging from the size of a grain of sand to a few micrometres. Mine tailings are usually produced from the mill in slurry form, whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lead Sulfide
Lead sulfide refers to two compounds containing lead and sulfur: * Lead(II) sulfide, PbS, containing lead in the +2 oxidation state, naturally occurring as the mineral galena *Lead(IV) sulfide Lead(IV) sulfide is a chemical compound with the formula Pb S2. This material is generated by the reaction of the more common lead(II) sulfide, PbS, with sulfur at >600 °C and at high pressures. PbS2, like the related tin(IV) sulfide SnS2, cryst ..., PbS2, containing lead in the +4 oxidation state {{Chemistry index ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galena
Galena, also called lead glance, is the natural mineral form of lead(II) sulfide (PbS). It is the most important ore of lead and an important source of silver. Galena is one of the most abundant and widely distributed sulfide minerals. It crystallizes in the cubic crystal system often showing octahedral forms. It is often associated with the minerals sphalerite, calcite and fluorite. Occurrence Galena is the main ore of lead, used since ancient times, since lead can be smelted from galena in an ordinary wood fire. Galena typically is found in hydrothermal veins in association with sphalerite, marcasite, chalcopyrite, cerussite, anglesite, dolomite, calcite, quartz, barite, and fluorite. It is also found in association with sphalerite in low-temperature lead-zinc deposits within limestone beds. Minor amounts are found in contact metamorphic zones, in pegmatites, and disseminated in sedimentary rock. In some deposits the galena contains up to 0.5% silver, a byprodu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zinc Sulfide
Zinc sulfide (or zinc sulphide) is an inorganic compound with the chemical formula of ZnS. This is the main form of zinc found in nature, where it mainly occurs as the mineral sphalerite. Although this mineral is usually black because of various impurities, the pure material is white, and it is widely used as a pigment. In its dense synthetic form, zinc sulfide can be transparent, and it is used as a window for visible optics and infrared optics. Structure ZnS exists in two main crystalline forms. This dualism is an example of polymorphism. In each form, the coordination geometry at Zn and S is tetrahedral. The more stable cubic form is known also as zinc blende or sphalerite. The hexagonal form is known as the mineral wurtzite, although it also can be produced synthetically.. The transition from the sphalerite form to the wurtzite form occurs at around 1020 °C. A tetragonal form is also known as the very rare mineral called polhemusite, with the formula . Applicatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Metal Market
''American Metal Market'' (AMM) is an online provider of industry news and metal pricing information for the U.S. steel, nonferrous and scrap markets. Products include a daily publication available electronically, live news on the publication's website, a hard-copy magazine and a series of weekly newsletters covering niche markets. The publication also plays host each year to a number of industry conferences and events covering the state of various metal markets. It has been hailed for its impartial coverage of the mining and manufacturing sectors, said to be "as vital to the metal-buyer as the ticker is to Wall Street." ''American Metal Market'' is a sister publication to London-based '' Metal Bulletin'' and was subsidiary of international publishing group Euromoney Institutional Investor Euromoney Institutional Investor PLC is one of Europe's largest business and financial information companies which has interests in business and financial publishing and event organizati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West Perth, Western Australia
West Perth is an inner list of Perth suburbs, suburb of Perth, the capital city of Western Australia. Geography Formerly an exclusive enclave for wealthy merchants and politicians, the West Perth suburb is now part of the inner mixed zone, and has predominantly office blocks which have displaced residential buildings. The suburb has a relatively high proportion of miners, consultants, and especially medical specialists as compared with the Perth#Central business district, Perth CBD. Streets such as Colin Street, Ord Street, and Outram Street have a significant percentage of office and high density residential buildings. Most retail outlets are located on Hay Street, Perth, Hay Street, which is the main commercial zone for the suburb, and these are focused on serving the office population. Closer to the CBD, the eastern edge of the suburb features both the Watertown brand outlet complex and the City West complex. This location was home to the Perth Metropolitan Markets from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
