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Mining is the of valuable minerals or other geological materials from the Earth, usually from an body, lode, vein, seam, reef or placer deposit.These deposits form a mineralized commodity that is of economic interest to the miner. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, chalk, dimension stone, rock salt, potash, gravel, and clay.read more
The principal of copper is copper pyrite and copper is extracted from this . The different steps in of copper are: Crushing and Concentration: The obtained from mines are broken down into small piece by jaw crusher and then pulverized. The being sulphide is concentrated by froth floatation .read more
from in a huge container called a blast furnace. such as haematite contain III oxide, Fe2O3. The oxygen must be removed from the III oxide in...read more
Direct reduction DR This is any process in which iron is extracted from ore at a temperature below the melting points of the materials involved. Gangue remains in the spongelike product, known as direct-reduced iron, or DRI, and must be removed in a subsequent steelmaking process.read more
from using blast furnace: requires a series of steps to be followed and is considered as the penultimate in metallurgy. The steps need the to be concentrated first, followed by the of the metal from the concentrated after which the metal is purified.read more
· Magnetite and hematite are oxides however, the of from an oxide involves a series of steps that begins when mined is crushed into smaller pieces by a crusher and then washed. The second step in is calcination or roasting of the , which removes certain impurities, carbon dioxide and other ...read more
of the of is carried out by the following steps: Concentration of Calcination or Roasting of Reduction of : Concentration of : In this metallurgical operation, the is concentrated by removing impurities like soil etc. involves the crushing and washing of .read more
· The iron itself is usually found in the form of magnetite Fe3O4, hematite Fe2O3, goethite FeO OH, limonite FeO OH.n H2O or siderite FeCO3. The process of mining consists of discovery of an iron ore deposit through extraction of iron ore and finally to returning the land to its natural state. It consists of several distinct steps.read more
The is quite a technical . is first roasted in air to produce ironIII oxide which is mixed with coke and limestone and then further heated to a very high temperature in a blast furnace. These materials are loaded into the blast furnace from the top while a blast of hot air is introduced into it from beneath via small pipes known as tuyeres.read more
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