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Rönnskär
Rönnskär () is a metallurgic plant located in Skelleftehamn, Sweden. The factory does extraction of copper, zinc and lead, and produces important quantities of sulfuric acid, silver and gold when extracted as joint products. Since 2012, electronic waste recycling has become a major activity of the factory. Launched in 1930 as Rönnskärsverken, Rönnskär is Boliden AB's main production site. History Gold discovered around Boliden in 1925 and important mineral deposits in Skellefteå accelerated the region's industrial growth. Minerals in Boliden contained high levels of arsenic, so in 1927 it became a priority for the country to develop its own extraction capacities of its own minerals. The main production site was created by unifying the Hamnskär and Rönnskär islands, and joining them to the main land. Construction of the factory, with its 128-meter chimney, started in 1928. The foundry started operations in January 1930. Production was essentially focused on pure cop ... [...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] |
Electrolysis
In chemistry and manufacturing, electrolysis is a technique that uses Direct current, direct electric current (DC) to drive an otherwise non-spontaneous chemical reaction. Electrolysis is commercially important as a stage in the separation of chemical element, elements from naturally occurring sources such as ores using an electrolytic cell. The voltage that is needed for electrolysis to occur is called the decomposition potential. The word "lysis" means to separate or break, so in terms, electrolysis would mean "breakdown via electricity." Etymology The word "electrolysis" was introduced by Michael Faraday in 1834, using the Greek language, Greek words "amber", which since the 17th century was associated with electrical phenomena, and ' meaning "dissolution". Nevertheless, electrolysis, as a tool to study chemical reactions and obtain pure chemical element, elements, precedes the coinage of the term and formal description by Faraday. History In the early nineteenth century, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skellefteå Municipality
Skellefteå Municipality () is a municipality in Västerbotten County in northern Sweden. Its seat is located in Skellefteå. History Most of the amalgamations leading to the present municipality took place in 1967 when the then "City of Skellefteå" was merged with the rural municipality by the same name and also with the municipalities Jörn, Bureå and Byske. The enlarged city became a municipality of unitary type with the new local government act in 1971, and in 1974 the municipalities Burträsk and Lövånger were added. Geography The municipality borders in the south to Robertsfors Municipality, and clockwise to Umeå, Vindeln, Norsjö, Arvidsjaur and Piteå municipalities. Skellefteå is the largest coastline municipality by area, being roughly 15 percent larger than the second largest, Örnsköldsvik Municipality. Skellefteå is situated around Skellefte River, a river that runs through the city. There is also a very central mountain, Vitberget, which is popular ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smelting
Smelting is a process of applying heat and a chemical reducing agent to an ore to extract a desired base metal product. It is a form of extractive metallurgy that is used to obtain many metals such as iron-making, iron, copper extraction, copper, silver mining#Ore processing, silver, tin, lead smelting, lead and zinc smelting, zinc. Smelting uses heat and a chemical reducing agent to decompose the ore, driving off other elements as gases or slag and leaving the metal behind. The reducing agent is commonly a fossil-fuel source of carbon, such as carbon monoxide from incomplete combustion of coke (fuel), coke—or, in earlier times, of charcoal. The oxygen in the ore binds to carbon at high temperatures, as the Chemical energy, chemical potential energy of the bonds in carbon dioxide () is lower than that of the bonds in the ore. Sulfide ores such as those commonly used to obtain copper, zinc or lead, are roasting (metallurgy), roasted before smelting in order to convert the sulfid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper Mining Companies Of Sweden
Copper is a chemical element; it has symbol Cu (from Latin ) 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, unalloyed metallic form. This means that copper is a native metal. This led to very early human use in several regions, from . Thousands of years later, it was the first metal to be smelted from sulfide ores, ; the first metal to be cast into a shape in a mold, ; and the first metal to be purposely alloyed with another metal, tin, to create bronze, . Commonly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metal Companies Of Sweden
A metal () is a material that, when polished or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. These properties are all associated with having electrons available at the Fermi level, as against nonmetallic materials which do not. Metals are typically ductile (can be drawn into a wire) and malleable (can be shaped via hammering or pressing). A metal may be a chemical element such as iron; an alloy such as stainless steel; or a molecular compound such as polymeric sulfur nitride. The general science of metals is called metallurgy, a subtopic of materials science; aspects of the electronic and thermal properties are also within the scope of condensed matter physics and solid-state chemistry, it is a multidisciplinary topic. In colloquial use materials such as steel alloys are referred to as metals, while others such as polymers, wood or ceramics are nonmetallic materials. A metal conducts electricity at a temperature of absolute zero ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Just Transition Fund
The energy policy of the European Union focuses on energy security, sustainability, and integrating the energy markets of member states. An increasingly important part of it is climate policy. A key energy policy adopted in 2009 is the 20/20/20 objectives, binding for all EU Member States. The target involved increasing the share of renewable energy in its final energy use to 20%, reduce greenhouse gases by 20% and increase energy efficiency by 20%. After this target was met, new targets for 2030 were set at a 55% reduction of greenhouse gas emissions by 2030 as part of the European Green Deal. After the Russian invasion of Ukraine, the EU's energy policy turned more towards energy security in their REPowerEU policy package, which boosts both renewable deployment and fossil fuel infrastructure for alternative suppliers. The EU Treaty of Lisbon of 2007 legally includes solidarity in matters of energy supply and changes to the energy policy within the EU. Prior to the Treaty o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kaldo Converter
A Kaldo converter (using the ''Kaldo process'' or ''Stora-Kaldo process'') is a rotary vessel oxygen based metal refining method. Originally applied to the refining of iron into steel, with most installations in the 1960s, the process is (2014) used primarily to refine non ferrous metals, typically copper. In that field, it is often named TBRC, or Top Blown Rotary Converter. History and description Steel production file:Affinage convertisseur Kaldo.svg, lang=en, upright=1.8, Evolution of chemical composition and temperature of the liquid steel, during the blowing in a Kaldo converter. The iron content is linked with the slag composition, the others elements are taken in the metal. The name "Kaldo" is derived from Prof. Bo Kalling, and from the Domnarvets Jernverk (''Stora Kopparbergs Bergslag'' subsidiary) both key in the development of the process. Research into the use of a stirring to promote mixing, and therefore rate of conversion was investigated from the 1940s, and invest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Converting (metallurgy)
Converting is a type of metallurgical smelting that includes several processes; the most commercially important form is the treatment of molten metal sulfides to produce crude metal and slag, as in the case of copper and nickel converting. A now-uncommon form is batch treatment of pig iron to produce steel by the Bessemer process. The vessel used was called the ''Bessemer converter''. Modern steel mills use basic oxygen process converters. Equipment The converting process occurs in a ''converter''. Two kinds of converters are widely used: horizontal and vertical. Horizontal (which are an improvement of the ) prevail in the metallurgy of non-ferrous metals. Such a converter is a horizontal barrel lined with refractory material inside. A hood for the purpose of the loading/unloading operations is located on the upper side of the converter. Two belts of tuyeres come along the axis on either sides of the converter. Molten sulfide material, referred to as matte, is poured th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skelleftehamn
Skelleftehamn is a locality situated in Skellefteå Municipality, Västerbotten County, Sweden with 3,184 inhabitants in 2010. Notable people * Stieg Larsson, journalist, writer and author of crime fiction/ thriller ''Millennium'' trilogy. * Victoria Silvstedt Karin Victoria Silvstedt (born 19 September 1974)''Expressen'', 29 October 2004. is a Swedish actress, singer, Playboy Playmate, television host, and beauty pageant titleholder. She participated in Miss World 1993, then branching into modelling ..., model, actress, singer and television personality. References External links {{authority control Populated places in Skellefteå Municipality ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reverberatory Furnace
A reverberatory furnace is a metallurgy, metallurgical or process Metallurgical furnace, furnace that isolates the material being processed from contact with the fuel, but not from contact with combustion gases. The term ''reverberation'' is used here in a generic sense of ''rebounding'' or ''Reflection (physics), reflecting'', not in the acoustics, acoustic sense of ''echoing''. Operation Chemistry determines the optimum relationship between the fuel and the material, among other variables. The reverberatory furnace can be contrasted on the one hand with the blast furnace, in which fuel and material are mixed in a single chamber, and, on the other hand, with crucible, Muffle furnace, muffling, or Retort, retort furnaces, in which the subject material is isolated from the fuel and all of the products of combustion including gases and flying ash. There are, however, a great many furnace designs, and the terminology of metallurgy has not been very consistently defined, so it is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ingot
An ingot is a piece of relatively pure material, usually metal, that is Casting, cast into a shape suitable for further processing. In steelmaking, it is the first step among semi-finished casting products. Ingots usually require a second procedure of shaping, such as cold/hot working, cutting, or milling to produce a useful final product. Non-metallic and semiconductor materials prepared in bulk form may also be referred to as ingots, particularly when cast by mold based methods. Precious metal ingots can be used as currency (with or without being processed into other shapes), or as a currency reserve, as with gold bars. Types Ingots are generally made of metal, either pure or alloy, heated past its melting point and cast into a bar or block using a mold chill method. A special case are polycrystalline or single crystal ingots made by pulling from a molten melt. Single crystal Single crystal ingots (called boule (crystal), boules) of materials are grown (crystal growth) using ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
