IRON TO STEEL

Question 1

What is the name of iron obtained from the blast furnace?

Answer 1

Cast iron or pig iron

Question 2

What is the feature if pig or cast iron?

Answer 2

It is brittle

Question 3

What are the impurities it contains?

Answer 3

Carbon, Sulfur, Silicon and Phosphorus

Question 4

How many percent of Carbon does it contain?

Answer 4

4%

Question 5

Where does the molten iron gets poured into after obtaining it from the blast furnace?

Answer 5

To the oxygen furnace

Question 6

Calcium oxide is added and a jet of oxygen is turned on. Is calcium Oxide acidic or basic?

Answer 6

Basic

Question 7

What are the first two reacts that occur?

Answer 7

C (s) + O (g) —-> CO2 (g)

S (s) + O2 (g) —-> SO2 (g)

Question 8

What happens to those gases?

Answer 8

They escape

Question 9

What are the second two reactions that take place?

Answer 9

Si (s) + O2 (g) —-> SiO2 (s)

2P (s) + 2.5 O2 (g) —-> P2O5 (s)

Question 10

Are those following compounds solids, liquids or gases?

SiO2 P2O5

Answer 10

Solids

Question 11

Are those following compounds Acids or bases?

SiO2 P2O5

Answer 11

Acids (non - metal oxides)

Question 12

What does Calcium oxide do? Include the chemical equation.

Answer 12

It neutralizes acidic impurities forming slag which is skimmed off.
CaO + SiO2 —-> CaSiO3