Basicity [%Cao + %MgO + %SiO2) of the slag in Indian blast furnace is in the range of___________________?
Correct answer: B. 1.1-1.4
- A. 0.7-1.0
- B. 1.1-1.4
- C. 1.5 - 1.8
- D. 2.0 - 2.5
Explanation
Blast-furnace slag is commonly controlled with a basicity ratio near 1.1 to 1.4, based chiefly on the CaO-to-SiO2 relationship, with MgO also contributing to basic character. The displayed formula is poorly formatted, but the keyed range corresponds to option b.
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