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Smelting involves reduction of metal oxide with

Smelting involves reduction of metal oxide with

Grade:Upto college level

1 Answers

Komal
askIITians Faculty 747 Points
5 years ago
Smeltingis a form ofextractive metallurgy; its main use is to produce a basemetalfrom itsore. This includes production ofsilver,iron,copperand otherbase metalsfrom their ores. Smelting makes use of heat and a chemicalreducing agentto decompose the ore, driving off other elements as gases orslagand leaving just the metal base behind. The reducing agent is commonly a source ofcarbonsuch ascoke, or in earlier timescharcoal. The carbon (or carbon monoxide derived from it) removesoxygenfrom the ore, leaving behind the elemental metal. The carbon is thus oxidized in two stages, producing firstcarbon monoxideand thencarbon dioxide. As most ores are impure, it is often necessary to useflux, such aslimestone, to remove the accompanying rockgangueasslag.

Plants for theelectrolyticreduction ofaluminiumare also generally referred to asaluminium smelters.

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