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Ferromanganese
Ferromanganese is an alloy of iron and manganese, with other elements such as silicon, carbon, sulfur, nitrogen and phosphorus. The primary use of ferromanganese is as a type of processed manganese source to add to different types of steel, such as stainless steel. Global production of low-carbon ferromanganese (i.e. alloys with less than 2% carbon content) reached 1.5 megatons in 2010. Physical and chemical properties The properties of ferromanganese vary considerably with the precise type and composition of the alloy. The melting point is generally between and . The density of the alloy depend slightly on the types of impurities present, but is generally around . Production Sources of manganese ore generally also contain iron oxides. As manganese has a more negative free energy of oxidation than iron, i.e. is chemically harder to reduce, during the reduction of manganese ore, iron is also reduced and mixed with the manganese in the melt. This is unlike other oxides such a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ferroalloys
Ferroalloy refers to various alloys of iron with a high proportion of one or more other elements such as manganese (Mn), aluminium (Al), or silicon (Si). They are used in the production of steels and alloys. The alloys impart distinctive qualities to steel and cast iron or serve important functions during production and are, therefore, closely associated with the iron and steel industry, the leading consumer of ferroalloys. The leading producers of ferroalloys in 2014 were China, South Africa, India, Russia and Kazakhstan, which accounted for 84% of the world production. World production of ferroalloys was estimated as 52.8 million tonnes in 2015. Compounds The main ferroalloys are: *FeAl – ferroaluminum *FeB – ferroboron – 12–20% of boron, max. 3% of silicon, max. 2% aluminium, max. 1% of carbon *FeCe – ferrocerium *FeCr – ferrochromium *FeMg – ferromagnesium *FeMn – ferromanganese *FeMo – ferromolybdenum – min. 60% Mo, max. 1% Si, max. 0.5% Cu *FeNb � ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quartzite
Quartzite is a hard, non- foliated metamorphic rock that was originally pure quartz sandstone.Essentials of Geology, 3rd Edition, Stephen Marshak, p 182 Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts, and hence quartzite is a metasandstone. Pure quartzite is usually white to grey, though quartzites often occur in various shades of pink and red due to varying amounts of hematite. Other colors, such as yellow, green, blue and orange, are due to other minerals. The term ''quartzite'' is also sometimes used for very hard but unmetamorphosed sandstones that are composed of quartz grains thoroughly cemented with additional quartz. Such sedimentary rock has come to be described as orthoquartzite to distinguish it from metamorphic quartzite, which is sometimes called metaquartzite to emphasize its metamorphic origins. Quartzite is very resistant to chemical weathering and often forms ridges and resist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spain
Spain, or the Kingdom of Spain, is a country in Southern Europe, Southern and Western Europe with territories in North Africa. Featuring the Punta de Tarifa, southernmost point of continental Europe, it is the largest country in Southern Europe and the fourth-most populous European Union member state. Spanning across the majority of the Iberian Peninsula, its territory also includes the Canary Islands, in the Eastern Atlantic Ocean, the Balearic Islands, in the Western Mediterranean Sea, and the Autonomous communities of Spain#Autonomous cities, autonomous cities of Ceuta and Melilla, in mainland Africa. Peninsular Spain is bordered to the north by France, Andorra, and the Bay of Biscay; to the east and south by the Mediterranean Sea and Gibraltar; and to the west by Portugal and the Atlantic Ocean. Spain's capital and List of largest cities in Spain, largest city is Madrid, and other major List of metropolitan areas in Spain, urban areas include Barcelona, Valencia, Seville, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Province Of A Coruña
The province of A Coruña ( ; ; historical ) is the northwesternmost province of Spain, and one of the four provinces which constitute the autonomous community of Galicia. This province is surrounded by the Atlantic Ocean to the west and north, Pontevedra Province to the south and Lugo Province to the east. History The history of this province starts at the end of the Middle Ages during the reign of the Catholic Monarchs of Spain. During those years this province was far smaller than today. This is because in the 1833 territorial division of Spain the entire Province of Betanzos together with half of the Mondoñedo were amalgamated into one single province with its capital city in A Coruña. Since 1833, the province has always been the one with the largest population and largest coast. Until the second half of the 20th century, this province was both the religious and cultural centre of the entire region. The University of Santiago de Compostela was the only universi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Puerto De Brens
{{disambiguation, geo ...
Puerto, a Spanish word meaning ''seaport'', may refer to: Places *El Puerto de Santa María, Andalusia, Spain *Puerto, a seaport town in Cagayan de Oro, Philippines *Puerto Colombia, Colombia *Puerto Cumarebo, Venezuela *Puerto Galera, Oriental Mindoro, Philippines *Puerto La Cruz, Venezuela *Puerto Píritu, Venezuela *Puerto Princesa, Palawan, Philippines *Puerto Rico, an unincorporated territory of the United States *Puerto Vallarta, Mexico Others *Milton Jesús Puerto (born 1969), Honduran politician * ''Puerto Rico'' (board game) *Operación Puerto doping case See also * * Puerta (other) Puerta refers to the old original gates of the Walled City of Intramuros in Manila. Puerta may also refer to: People * Antonio Puerta, Spanish footballer * Alonso José Puerta, Spanish politician * Lina Puerta, American artist *Mariano Puerta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spiegeleisen
Spiegeleisen (literally "mirror-iron", —mirror or specular; —iron) is a ferromanganese alloy containing approximately 15% manganese and small quantities of carbon and silicon. Spiegeleisen is sometimes also referred to as ''specular pig iron'', ''Spiegel iron'', just ''Spiegel'', or ''Bisalloy''. Usage Historically, this was the standard form in which manganese was traded and used in steel making. Manganese is useful in steel manufacture because it binds with phosphorus, sulfur, and silica, removing them (to a degree) from the iron. It was much used in conjunction with the Bessemer process both to introduce carbon and manganese, and also to reduce impurities. Manufacture In the 19th-century spiegeleisen was made either by mixing iron ores with appropriate levels of manganese and smelting them directly, or by adding pyrolusite or manganite Manganite is a mineral composed of manganese oxide-hydroxide, MnO(OH), crystallizing in the monoclinic system (pseudo-orthorhombic). ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centennial Exposition
The Centennial International Exhibition, officially the International Exhibition of Arts, Manufactures, and Products of the Soil and Mine, was held in Philadelphia, Pennsylvania, from May 10 to November 10, 1876. It was the first official world's fair to be held in the United States and coincided with the centennial anniversary of the United States Declaration of Independence, Declaration of Independence's adoption in Philadelphia on July 4, 1776. It was held in Fairmount Park along the Schuylkill River on fairgrounds designed by Herman J. Schwarzmann. Nearly 10 million visitors attended the exposition, and 37 countries participated in it. Precursor The Great Central Fair on Logan Square, Philadelphia, Logan Square in Philadelphia, in 1864, also known as the Great Sanitary Fair, was one of the many United States Sanitary Commission's Sanitary Fairs held during the American Civil War. The fairs provided a creative and communal means for ordinary citizens to promote the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Weltausstellung 1873 Wien
The 1873 Vienna World's Fair () was the large world exposition that was held from 1 May to 31 October 1873 in the Austria-Hungarian capital Vienna. Its motto was "Culture and Education" (). History As well as being a chance to showcase Austro-Hungarian industry and culture, the World's Fair in Vienna commemorated Franz JosephI's 25th year as emperor. The main grounds were in the Prater, a park near the Danube River, and preparations cost £23.4 million. It lasted from May 1 to November 2, hosting about 7,225,000 visitors. Facilities There were almost 26,000 exhibitors housed in different buildings that were erected for this exposition, including the '' Rotunda'' (), a large circular building in the great park of Prater designed by the Scottish engineer John Scott Russell. (The fair Rotunda was destroyed by fire on 17 September 1937.) Russian pavilion The Russian pavilion had a naval section designed by Viktor Hartmann. Exhibits included models of the Port of Rijeka and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lambert Von Pantz
Lambert may refer to People *Lambert (name), a given name and surname * Lambert, Bishop of Ostia (–1130), became Pope Honorius II * Lambert, Margrave of Tuscany (fl. 929–931), also count and duke of Lucca *Lambert (pianist), stage-name of German pianist and composer Paul Lambert *Johann Heinrich Lambert (1728–1777), polymath Places United States *Lambert, Mississippi, a town *Lambert, Missouri, a village *St. Louis Lambert International Airport, St. Louis, Missouri * Lambert, Montana, a rural town in Montana *Lambert, Oklahoma, a town * Lambert Township, Red Lake County, Minnesota *Lambert Castle, a mansion in Paterson, New Jersey * Lambert Creek, San Mateo County, California Elsewhere * Lambert Gravitational Centre, the geographical centre of Australia *Lambert (lunar crater), named after Johann Heinrich Lambert * Lambert (Martian crater), named after Johann Heinrich Lambert Transportation *Lambert (automobile), a defunct American automobile brand *Lambert (cyclecar), Bri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henry Bessemer
Sir Henry Bessemer (19 January 1813 – 15 March 1898) was an English inventor, whose steel-making process would become the most important technique for making steel in the nineteenth century for almost one hundred years. He also played a significant role in establishing the town of Sheffield, nicknamed ‘Steel City’, as a major industrial centre. Bessemer had been trying to reduce the cost of steel-making for military ordnance, and developed his system for blowing air through molten pig iron to remove the impurities. This made steel easier, quicker and cheaper to manufacture, and revolutionised structural engineering. One of the most significant inventors of the Second Industrial Revolution, Bessemer also made at least 128 other inventions in the fields of iron, steel and glass. Unlike many inventors, he managed to bring his own projects to fruition and profited financially from their success. He was knighted for his contribution to science in 1879, and in the same year w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
