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Q: Why limestone is used in the blast furnace?
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How does limestone coke and iron ore get into the blast furnace?

through the top of the blast furnace


How is limestone usefull?

because in a blast furnace the limestone removes unwanted substances as slag.


Why is Limestone added to a Blast Furnace for producing Iron?

it purifies it


What is a common flux in a blast furnace?

Limestone, dolomite, BOF slag, electric furnace slag, olivine


Which three substances are put into the blast furnace?

Limestone, Iron Ore and Coke.


What is Blast Furnace?

A blast furnace is used to extract iron from its ore.


What are the three substances fed into the blast furnace?

Carbon rich coke limestone and iron


What is used in the furnace to extract the iron?

blast furnace


What is the purpose of limestone in the blast furnace?

The limestone decomposes to quicklime and carbon dioxide, and the quicklime removes acidic impurities (eg SiO2). So basically limestone is to remove impurities


What is difference between Cupola furnace and blast furnace?

In essence nothing, a Cupola furnace is a type of blast furnace in that it is charged at the top and tapped at the bottom and air is blasted into the furnace via a wind belt and tuyres. A blast furnace in a steel works is a huge structure operated for long periods of time, it is charged with iron ore, coke and limestone and reduces the iron ore into pure iron. A Cupola furnace, as used in the foundry re melts pig iron, from the blast furnace, along with foundry scrap, steel scrap and scrap iron engine blocks and produced iron alloys of various specifications. A Cupola furnace is usually operated on a daily basis but some types can be continuously operated for several weeks


What goes into a blast furnace?

Sinter, which is a mixture of iron ore, coke and limestone, and a blast of hot air. Externally to the furnace, iron ore, coke and limestone are mixed together Intimate mixing ensures that the reactants are as close as possible to each other. This is loaded into the top of the blast furnace. A blast of hot air ( ~ 1100 oC) is sent in at the bottom of the furnace, through tuyeres. The oxygen (air) is also one of the reactants. The products are tapped from the bottom of the furb=nace are liquid iron and 'slag' ( calcium silicate).


What kind of fire bricks are used for molten blast furnace slag?

What kind of fire bricks are used for molten blast furnace slag?