A. SiO2
B. Al2O3
C. MnO2
D. P
Related Mcqs:
- 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 - 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 - Most of the phosphorous present in the blast furnace burden enters into___________________?
A. Hot metal
B. Flue gases
C. Slag
D. Refractory lining - 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 - The approximate height of a blast furnace having a useful volume of 2000 m3 is about _______________ metres ?
A. 25
B. 35
C. 55
D. 75 - Blast furnace slag is mainly molten_________________?
A. Sand
B. Magnesium silicate
C. Calcium silicate
D. Iron pyrite - For efficient performance of a blast furnace, the extent of reduction of Wustite (FeO) should be___________________?
A. 100% indirect reduction
B. 100% direct reduction
C. 50-60% indirect reduction
D. 30-40% indirect reduction - Specific gravity of hot metal (pig iron) is ______________ times that of the blast furnace slag ?
A. 2
B. 3
C. 0.8
D. 6 - 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 - The main charge in blast furnace is usually___________________?
A. Iron ore & coke
B. Iron ore, coke & air
C. Limestone, coke & iron ore
D. Limestone, sand & iron ore
