The main charge in blast furnace is usually

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

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

A

20

B

40

C

60

D

80

Which of the following contributes maximum as main source of sulphur in the blast furnace charge ?

A

Sinter

B

Coke

C

Iron ore

D

Limestone

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

The charge is fed into the blast furnace through the

A

Stack

B

Throat

C

Bosh

D

Tyres

The charge of the blast furnace consists of

A

Calcined ore (8 parts), coke (4 parts) and limestone (1 part)

B

Calcined ore (4 parts), coke (1 part) and limestone (8 parts)

C

Calcined ore (1 part), coke (8 parts) and limestone (4 parts)

D

Calcined ore, coke and limestone all in equal parts

The coke in the charge of blast furnace

A

Controls the grade of pig iron

B

Acts as an iron bearing mineral

C

Supplies heat to reduce ore and melt the iron

D

Forms a slag by combining with impurities

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 main reducing agent in iron blast furnace is

A

Carbon dioxide

B

Carbon monoxide

C

Oxygen

D

Air

An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called __________ furnace.

A

Resistance

B

Arc

C

Low frequency induction

D

None of these

The main charge in blast furnace is usually

Related Questions