The impure iron (pig iron) that is tapped out from blast furnace contains about __________ percent carbon.

The fuel mostly used in blast furnace for extracting pig iron from iron ores is

A

Hard coke

B

Soft coke

C

Pulverized coal

D

Bituminous coal

Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same weight

A

1.5

B

3

C

5

D

7

Specific gravity of hot metal (pig iron) is __________ times that of the blast furnace slag.

A

2

B

3

C

0.8

D

6

Thermal efficiency of blast furnace stoves used for heating blast (air) may be about __________ percent.

A

20

B

40

C

60

D

80

Limestone is added in the blast furnace (during pig iron manufacture) to

A

Form slag by combining with impurities

B

Supply heat by undergoing exothermic reaction with impurities

C

Reduce the coke consumption

D

Reduce slag viscosity

Pig iron is produced by blast furnaces in India using mostly the iron ore named

A

Hematite

B

Magnetite

C

Siderite

D

Chalcopyrite

In the blast furnace, incorporation of water vapour in the blast gives the following effect.

A

Increases the reducing potential of the gas

B

Increases the flame temperature

C

No significant change occurs

D

Increases the hydrogen content in the metal

__________ is used as a flux in the extraction of iron from iron ore (hametite) in blast furnace.

A

Bauxite

B

Limestone

C

Quartz

D

Manganese

Operation of blast furnace stove is based on the principles of a __________ furnace.

A

Regenerative

B

Recuperative

C

Both A and B

D

Neither A nor B

Which is the main reducing agent during production of iron from iron ore in a blast furnace?

A

C

B

CO

C

CO₂

D

H₂

The impure iron (pig iron) that is tapped out from blast furnace contains about __________ percent carbon.

Related Questions