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To remove impurities, mainly sand ( silicon dioxide). It is sometimes reflerred to as a 'flux'.
The limestone undergoes thermal decomposition.
CaCO3 = CaO + CO2
The CO2 reacts with the coke to produce carbon monoxide
CO2 + C = 2CO
The Carbon monoxide reduces the iron ore ( iron oxide) to iron
Fe2O3 + 3CO = 2Fe + 3CO2
The iron is tapped off at base of the furnace. The CO2 recircluates to form more carbon monoixide.
The Iron ore contains a number of impurities , notably sand (silicon dioxde ; SiO2)
These impurities react with calcium oxide (CaO) produces from the thermal decomposition of ;omestone, to form 'slag'.
CaO + SiO2 = CaSiO3 (calcium silicate (Slag)).
Since tons of slag is produced it is used to make 'breeze blocks' for building and road surfaces.
lenpollock
Wiki User
∙ 11y agoTo remove impurities
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Why is Limestone added to a Blast Furnace for producing Iron?
it purifies it
Which three substances are put into the blast furnace?
Limestone, Iron Ore and Coke.
What are the three substances fed into the blast furnace?
Carbon rich coke limestone and iron
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).
Extraction of lead from galena by heating process?
First: Roast the Galena in a blast furnace for 30 minuets. Second: Add Carbon to the blast furnace to remove impurities. Third: Tag off your lead from the bottom of the blast furnace.
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 are the three substances fed into the blast furnace?
Carbon rich coke limestone and iron
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 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).
Extraction of lead from galena by heating process?
First: Roast the Galena in a blast furnace for 30 minuets. Second: Add Carbon to the blast furnace to remove impurities. Third: Tag off your lead from the bottom of the blast furnace.
Why is limestone added to the blast furnace during the extraction of iron?
Iron ore contains the impurities sand and clay, which are silicon oxides. Limestone is added to remove these impurities.
What raw material are put into a blast furnace?
The blast furnace is a huge, steel stack lined with refractory brick, where iron ore, coke and limestone are dumped into the top, and preheated air is blown into the bottom. The raw materials require 6 to 8 hours to descend to the bottom of the furnace where they become the final product of liquid slag and liquid iron.
Pig iron is produced by heating the coke iron and limestone in a what?
Pig iron is produced when heating * Iron ORE (not iron as the question says!) * Coke * limestone in a Blast Furnace.
