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How is iron extracted industrially?

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How is iron extracted industrially?

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How is iron extracted industrially?

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Text solutionVerified

The ore is crushed into small lumps and then each out the soluble impurities in running water. Then it undergoes roasting. Thus impurities like sulfur , arsenic , moisture etc. removed. The roasted ore is mixed with coke and limestone and the mixture is changed into a blast furnace.
Reaction in blast furnace:

At high temperature ,

C a C O_{3}

(limestone) decomposes to form

C a O

.

C a O_{2} (s) \to C a O (s) + C O_{2} (g)

This

C a O

combines with acidic gangue,

S i O_{2}

forming slag.

C a O (s) + S i O_{2} (g) \to C a S i O_{3} (s)

Coke reacts with oxygen and form

C O_{2}

C (s) + O_{2} (g) \to C O_{2} (g)

C O_{2}

combines with more carbon and produces

CO

.

C O_{2} (g) + C_{2} (s) + He a t \to 2 CO (g)

This

CO

acts as reducing agent.

F e_{2} O_{3}

is reduced to form

F e

.

F e_{2} O_{3} (s) + 3 CO (g) \to 2 F e (s) + 3 C O_{2} (g)

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Question Text	How is iron extracted industrially?
Answer Type	Text solution:1
Upvotes	150