A. Sinter
B. Coke
C. Iron ore
D. Limestone
Related Mcqs:
- 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 - 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 - One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C). If the thermal conductivity of furnace wall is 3 W. m-1. k-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is____________________?
A. 100
B. 900
C. 9000
D. 10000 - 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 - 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 - Blast furnace slag is mainly molten_________________?
A. Sand
B. Magnesium silicate
C. Calcium silicate
D. Iron pyrite - Most of the phosphorous present in the blast furnace burden enters into___________________?
A. Hot metal
B. Flue gases
C. Slag
D. Refractory lining - Limestone addition in the blast furnace is done to flux _______________ present in the raw materials?
A. SiO2
B. Al2O3
C. MnO2
D. P - 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
