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Metallurgy can be defined as the science of elements. This particular branch deals with the physical and chemical behaviour of metals. Since metals and their alloys are integral to an engineer’s life, it makes sense to study them deeply. Metallurgy deals with extracting, mining, and designing items using metals. It is a highly sought-after branch across the world.
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Metallurgy is the branch of engineering which involves the extraction of metals from Ores, i.e. minerals. Metals that occur along with soil, limestone, sand, and rocks are known as minerals. Basically, metallurgy is the purification of metals and studying chemical, physical and atomic characteristics along with the structure of metals, then forming mixtures of metals called alloys.
Today’s developed field of metallurgy is the result of the development of over 6500 years in this field. Gold, silver, and copper came into the picture, and their use for ornaments and other useful items started from the stone age. An example is the copper axe developed in the 4th century B.C.
The process of metallurgy firstly involves the crushing of minerals by a ball mill or crusher miller, which forms its fine powder, and this process is known as pulverization.
Then further purification of minerals has to be done, known as the concentration of ores done by various methods. The hydrolytic method is used where ore is poured over a grooved, vibrating sloped table and water is allowed to pass over the surface; the particles of ore are heavier and remain at the bottom of grooves, whereas the impurities on the surface are washed with a jet of water.
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Magnetic separation is the method of separating non-magnetic particles from magnetic particles by using the magnetic wheel.
Froth floatation method where ore is taken along with oil and water in the tank of large capacity, then compressed air is passed through them because of which separation takes place in the form of froth. Ore is lighter in nature; it comes on the surface, leaving behind impurities.
Roasting and calcination in roasting ore are heated in the presence of oxygen; generally, it is used for sulfide ores. Calcination is a method where heating is done in the absence of air for the melting of ores, used mostly in the case of carbonate or hydrated oxides.
Alloying is the making of a mixture of metals; it offers many advantages like providing better properties than pure metals, increasing strength, increasing corrosion resistance and reducing cost. Various microscopic methods are used to evaluate the microstructure of alloy, like optical microscopy with a magnification of 50 to 500X and electron microscopy like scanning electron microscopy with a magnification of 100 to 20000X. Mechanical properties that need to be tested are yield stress, elongation, hardness, and toughness.
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Since the usage of the field is widespread, metallurgy is becoming an important branch of engineering. However, it may not be everyone’s cup of tea. Completing assignments, and understanding difficult concepts of the subject might prove tough for some students. For such students, online help for assignments and homework for metallurgy is available at https://www.onlinecollegehomeworkhelp.com.
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