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Polysius AG
Polysius AG is a German company and subsidiary of ThyssenKrupp Technologies that manufactures cement plants and builds cement mills, cement kilns, cement factory automation systems and ore grinding facilities. Polysius is active around the world, constructing, installing and managing cement and ore processing plants. In spring 1859, master machinist Andreas Ernst Gottfried Polysius opened his own workshop in Dessau, thereby laying the foundations for Polysius AG. In 1870, he set up the G. Polysius iron foundry and engineering works, which soon became a designer and manufacturer of mills for the burgeoning construction materials industry. By 1890, the founder's heirs were working on the company's 100th mill contract. From that time onwards, Polysius specialised in machines for crushing, grinding and dressing/processing raw materials, as well as in the construction of cement works. In 1898, the company built Europe's first rotary kiln and in 1907 constructed a complete cement fa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subsidiary Company
A subsidiary, subsidiary company or daughter company is a company (law), company owned or controlled by another company, which is called the parent company or holding company. Two or more subsidiaries that either belong to the same parent company or having a same management being substantially controlled by same entity/group are called sister companies. The subsidiary can be a company (usually with limited liability company, limited liability) and may be a government- or state-owned enterprise. They are a common feature of modern business life, and most multinational corporations organize their operations in this way. Examples of holding companies are Berkshire Hathaway, Jefferies Financial Group, The Walt Disney Company, Warner Bros. Discovery, or Citigroup; as well as more focused companies such as IBM, Xerox, and Microsoft. These, and others, organize their businesses into national and functional subsidiaries, often with multiple levels of subsidiaries. Details Subsidiaries ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ThyssenKrupp
ThyssenKrupp AG (, ; stylized as thyssenkrupp) is a German industrial engineering and steel production multinational corporation, multinational Conglomerate (company), conglomerate. It is the result of the 1999 merger of Thyssen AG and Krupp and has its operational headquarters in Duisburg and Essen. The company claims to be one of the world's largest List of steel producers, steel producers, and it was ranked tenth-largest worldwide by revenue in 2015."The world's largest steel companies in 2015, based on revenue" ''Statista'' It is divided into 670 subsidiaries worldwide. The largest shareholders are Alfried Krupp von Bohlen und Halbach Foundation and Cevian Capital. ThyssenKrupp's products range from machines and indust ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cement Mill
A cement mill (or finish mill in North American usage) is the equipment used to grind the hard, nodular clinker from the cement kiln into the fine grey powder that is cement. Most cement is currently ground in ball mills and also vertical roller mills which are more effective than ball mills. History Early hydraulic cements, such as those of James Parker, James Frost and Joseph Aspdin were relatively soft and readily ground by the primitive technology of the day, using flat millstones. The emergence of Portland cement in the 1840s made grinding considerably more difficult, because the clinker produced by the kiln is often as hard as the millstone material. Because of this, cement continued to be ground very coarsely (typically 20% over 100 μm particle diameter) until better grinding technology became available. Besides producing un-reactive cement with slow strength growth, this exacerbated the problem of unsoundness. This late, disruptive expansion is caused by hydratio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cement Kiln
Cement kilns are used for the pyroprocessing stage of manufacture of portland and other types of hydraulic cement, in which calcium carbonate reacts with silica-bearing minerals to form a mixture of calcium silicates. Over a billion tonnes of cement are made per year, and cement kilns are the heart of this production process: their capacity usually defines the capacity of the cement plant. As the main energy-consuming and greenhouse-gas–emitting stage of cement manufacture, improvement of kiln efficiency has been the central concern of cement manufacturing technology. Emissions from cement kilns are a major source of greenhouse gas emissions, accounting for around 2.5% of non-natural carbon emissions worldwide. The manufacture of cement clinker A typical process of manufacture consists of three stages: * grinding a mixture of limestone and clay or shale to make a fine "rawmix" (see Rawmill); * heating the rawmix to sintering temperature (up to 1450 °C) in a cement k ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Automation
Automation describes a wide range of technologies that reduce human intervention in processes, namely by predetermining decision criteria, subprocess relationships, and related actions, as well as embodying those predeterminations in machines. Automation has been achieved by various means including mechanical, hydraulic, pneumatic, electrical, electronic devices, and computers, usually in combination. Complicated systems, such as modern factories, airplanes, and ships typically use combinations of all of these techniques. The benefit of automation includes labor savings, reducing waste, savings in electricity costs, savings in material costs, and improvements to quality, accuracy, and precision. Automation includes the use of various equipment and control systems such as machinery, processes in factories, boilers, and heat-treating ovens, switching on telephone networks, steering, and stabilization of ships, aircraft, and other applications and vehicles with reduced hu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grinding Mill
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 purposes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ore Processing
Extractive metallurgy is a branch of metallurgical engineering wherein process and methods of extraction of metals from their natural mineral deposits are studied. The field is a materials science, covering all aspects of the types of ore, washing, concentration, separation, chemical processes and extraction of pure metal and their alloying to suit various applications, sometimes for direct use as a finished product, but more often in a form that requires further working to achieve the given properties to suit the applications. The field of ferrous and non-ferrous extractive metallurgy have specialties that are generically grouped into the categories of mineral processing, hydrometallurgy, pyrometallurgy, and electrometallurgy based on the process adopted to extract the metal. Several processes are used for extraction of same metal depending on occurrence and chemical requirements. Mineral processing Mineral processing begins with beneficiation, consisting of initially break ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andreas Ernst Gottfried Polysius
Andreas Ernst Gottfried Polysius (Born 27 November 1827 in Dessau; † 21 April 1886 ) was a German Industrialist. Family Andreas Ernst Gottfried Polysius was born in Dessau the only son of Gottfried Polysius and Louise Sturm. His father was manager of a sheep farm in Dessau. His mother died at a young age. His father was soon remarried, to Louise Amelang, daughter of a lumber trader Gottfried Amelang and the Leopoldine Schmidt. From this marriage his father bore two sons, Andreas's half brothers: Gottfried Otto Polysius, * 27 September 1863, and Gottfried max of Polysius, * 19 March 1870. Life Polysius began his education in Dessau. During his time at school he developed a fascination for the industrial processes gaining ascendency in Europe at the time; he structured his education accordingly. During the years of his education he traveled to Switzerland, to London and Paris. In 1859, he began an apprentice at a workshop in Dessau and thereby laid the foundation-stone for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beckum, Germany
Beckum (; Westphalian: ''Biäkem'') is a town in the northern part of North Rhine-Westphalia, Germany. It is about 20 km (12 miles) north-east of Hamm and 35 km (22 miles) south-east of Münster. It gives its name to the nearby Beckum Hills. History Several Neolithic stone cists are the earliest traces of humans in the area around the three brooks, Kollenbach, Lippbach and Siechenbach. Because of these three brooks, the town was eventually named Bekehem or later Beckum, meaning "home upon the brooks". In 1224, Beckum was granted its town charter, and it quickly grew in wealth as merchants and craftsmen set up businesses in the town. The town quickly expanded to an area of over 22 km2 (8.5 sq miles). However wars, riots and the Black Death in the following centuries left their mark on the town. After the Thirty Years' War, legislation removed several rights from cities and towns, and as a result many cities and towns in Münsterland became heavily economically an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subsidiaries
A subsidiary, subsidiary company or daughter company is a company owned or controlled by another company, which is called the parent company or holding company. Two or more subsidiaries that either belong to the same parent company or having a same management being substantially controlled by same entity/group are called sister companies. The subsidiary can be a company (usually with limited liability) and may be a government- or state-owned enterprise. They are a common feature of modern business life, and most multinational corporations organize their operations in this way. Examples of holding companies are Berkshire Hathaway, Jefferies Financial Group, The Walt Disney Company, Warner Bros. Discovery, or Citigroup; as well as more focused companies such as IBM, Xerox, and Microsoft. These, and others, organize their businesses into national and functional subsidiaries, often with multiple levels of subsidiaries. Details Subsidiaries are separate, distinct legal entities for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Continent
A continent is any of several large landmasses. Generally identified by convention rather than any strict criteria, up to seven geographical regions are commonly regarded as continents. Ordered from largest in area to smallest, these seven regions are: Asia, Africa, North America, South America, Antarctica, Europe, and Australia. "Most people recognize seven continents—Asia, Africa, North America, South America, Antarctica, Europe, and Australia, from largest to smallest—although sometimes Asia and Europe are considered a single continent, Eurasia." Variations with fewer continents may merge some of these, for example America, Eurasia, or Afro-Eurasia are sometimes treated as single continents, which can bring the total number as low as four. Zealandia, a largely submerged mass of continental crust, has also been described as a continent. Oceanic islands are frequently grouped with a nearby continent to divide all the world's land into geographical regions. Under t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Engineering Companies Of Germany
Engineering is the use of scientific principles to design and build machines, structures, and other items, including bridges, tunnels, roads, vehicles, and buildings. The discipline of engineering encompasses a broad range of more specialized fields of engineering, each with a more specific emphasis on particular areas of applied mathematics, applied science, and types of application. See glossary of engineering. The term ''engineering'' is derived from the Latin ''ingenium'', meaning "cleverness" and ''ingeniare'', meaning "to contrive, devise". Definition The American Engineers' Council for Professional Development (ECPD, the predecessor of ABET) has defined "engineering" as: The creative application of scientific principles to design or develop structures, machines, apparatus, or manufacturing processes, or works utilizing them singly or in combination; or to construct or operate the same with full cognizance of their design; or to forecast their behavior under specific ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
