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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] |
