6.7 Write down the reactions taking place in different zones in the blast furnace during the extraction of iron.
At 500-800K
limestone also decomposes to calcium oxide which reverses silicate impurity of the ore as slag
At 900-1500K
CBSE Class 12 Board Economics Paper Analysis: 'Student-friendly', well balanced with moderate difficulty
CBSE Class 12 Hindi exam 2025 not postponed; special exam for those who miss
CBSE Board Exams 2025 LIVE: Class 12 Hindi paper over; updates on exam analysis, answer key
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