Manufacturing of iron. a. Name the furnace used for producing iron.

1.	Manufacturing of iron. a. Name the furnace used for producing iron. b. Name the materials using for producing iron. c. Write down the reaction occurring on coke when hot is blasted on it? d. Why CaCO3 is dropping inside the furnace? e. Write down the nature of gangue with iron ore. f. Gangue + flux → ……….. Write down the uses of the product formed in blast furnace. g. Reducing agent in blast furnace h. Write down the reactions taking place inside the blast furnace. i. Iron formed from the blast furnace is called …………… j. How can we change iron into steel? k. What are the different types of steel?
Answer» a. Blast Furnace b. Mixture of roasted haematite, coke and limestone. c. At the bottom of the blast furnace, coke combines with oxygen in the hot current of air. The CO₂ which rises up along with the hot air current is reduced by coke. d. CaCO₃ in the furnace decomposes to form CaO and CO₂ . CaO which is basic combines with SiO₂ (acidic) to form slag. Molten slag which is lighter floats over the heavier molten iron. CaCO₃ is added to the furnace for the production of slag. e. Acidic f. Slag. (CaSiO₃) used for the production of cement and in the Construction of Road. g. Carbon monoxide h. CaCO₃ (s) → CaO + CO₂ CaO + SiO₂ → CaSiO₃ C + O₂ CO₂ + Heat CO₂ (g) + C_(s) + Heat → 2CO (g) Fe₂O₃ +3CO → 2Fe + 3CO₂ i. Pig iron j. Different types of steel can be prepared by varying the amount of carbon from 0.1 to 1.5 k. Mild steel, Medium steel, High carbon steel Mild steel:- If the carbon content in steel is from 0.05% to 0.2 % then it in called mild steel. I Medium steel :- Medium steel contains carbon from 0.2 % to 0.6 % medium steel High carbon steel: – If the content of carbon is from 0.61 % to 15 % then it is known as high carbon steel.

Manufacturing of iron. a. Name the furnace used for producing iron. b. Name the materials using for producing iron. c. Write down the reaction occurring on coke when hot is blasted on it? d. Why CaCO3 is dropping inside the furnace? e. Write down the nature of gangue with iron ore. f. Gangue + flux → ……….. Write down the uses of the product formed in blast furnace. g. Reducing agent in blast furnace h. Write down the reactions taking place inside the blast furnace. i. Iron formed from the blast furnace is called …………… j. How can we change iron into steel? k. What are the different types of steel?

Answer»

a. Blast Furnace

b. Mixture of roasted haematite, coke and limestone.

c. At the bottom of the blast furnace, coke combines with oxygen in the hot current of air. The CO₂ which rises up along with the hot air current is reduced by coke.

d. CaCO₃ in the furnace decomposes to form CaO and CO₂ . CaO which is basic combines with SiO₂ (acidic) to form slag. Molten slag which is lighter floats over the heavier molten iron. CaCO₃ is added to the furnace for the production of slag.

e. Acidic

f. Slag. (CaSiO₃) used for the production of cement and in the Construction of Road.

g. Carbon monoxide

h. CaCO₃ (s) → CaO + CO₂

CaO + SiO₂ → CaSiO₃

C + O₂ CO₂ + Heat

CO₂ (g) + C_(s) + Heat → 2CO (g)

Fe₂O₃ +3CO → 2Fe + 3CO₂

i. Pig iron

j. Different types of steel can be prepared by varying the amount of carbon from 0.1 to 1.5

k. Mild steel, Medium steel, High carbon steel

Mild steel:-

If the carbon content in steel is from 0.05% to 0.2 % then it in called mild steel. I

Medium steel :-

Medium steel contains carbon from 0.2 % to 0.6 % medium steel

High carbon steel: –

If the content of carbon is from 0.61 % to 15 % then it is known as high carbon steel.

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