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How does limestone remove impurities during the extraction of iron?
Wiki User
∙ 12y ago
Limestone
is calcium
carbonate
(
Ca
CO3
) and it is
added
to the
blast furnace
to
remove
the
impurities
in the
iron
ore
.
Calcium
carbonate
is
decomposed
by
heat
in the
furnace
to give
calcium
oxide
(
quicklime
) and
carbon dioxide
.
This is called
thermal decomposition
(see examples of
other carbonates
).
Wiki User
∙ 12y ago
Wiki User
∙ 14y agoIt helps gather impurities from the molten ore.
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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
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To help remove impurities.
For what purpose is charcoal used in recrystallization?
Activated carbon is also known as decolorizing carbon. It is used to remove the colored impurities from the sample. Activated carbon provides a high surface area to absorb colored impurities. http://designer-drugs.com/pte/12.162.180.114/dcd/chemistry/equipment/recrystallization.html
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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 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
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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 croylite added to aluminium?
To help remove impurities.
