In the metallurgy of iron, the upper layer obtained in the bottom of blast furnace mainly contains:
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a
CaSiO3
b
spongy iron
c
Fe2O3
d
FeSiO3
answer is A.
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Detailed Solution
CaO+SiO2→CaSiO3 (slag) (Haematite ore contains silica as impurities). Slag being lighter and insoluble in molten metal floats over and thus forms upper layer.