Limestone addition in the blast furnace is done to flux _______________ present in the raw materials?
Correct answer: A. SiO2
- A. SiO2
- B. Al2O3
- C. MnO2
- D. P
Explanation
Limestone decomposes to CaO in the blast furnace, and the basic CaO combines with acidic silica to form a fusible slag. Thus limestone is primarily added to flux SiO2 in the gangue.
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