extraction of iron Flashcards

1
Q

what are the materials added to furnace

A
  • Iron ore (hematite)
  • Coke (impure carbon)
  • limestone
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2
Q

what is the purpose of limestone?

A
  • react with silica in hematite -> produce slag
    -> Produce calcium silica
    CaO(s) + SiO2(s) → CaSiO3(l)

> > > This process is neutralisation

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3
Q

what limestone used

A

calcium carbonate
-> but they thermally decompose to form calcium oxide
CaCO3(s) → CaO(s) + CO2(g)

calcium carbonate → calcium oxide + carbon dioxide

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4
Q

what is the equation to make iron

A

Iron(III) oxide + carbon monoxide → iron + carbon dioxide

2Fe2O3(s) + 3CO(s) → 4Fe(l) + 3CO2(g)

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5
Q

what happen to slag

A

-> tapped off separately

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6
Q

what are zone 1

A

C (s) + O2 (g) → CO2 (g)

C from coke

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6
Q

How many zones are there

A

3

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7
Q

what are zone 2

A

CO2 (g) + C (s) → 2CO (g)

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