Question

Iron and Steel industry requires Iron ore, coking coal and limestone in which of the following proportions?
(a) 2 : 3 : 1
(b) 4 : 2 : 1
(c) 1 : 2 : 3
(d) 2 : 3 : 4

Answer 1

Answer:

Iron and Steel industry requires Iron ore, coking coal and limestone in which of the following proportions?

a) 2 : 3 : 1

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Answer 2

Option B is the right answer. The iron and Steel industry requires Iron ore, coking coal, and limestone in the ratio of 4:2:1

• Iron, making takes place in a blast furnace.
• Coke is introduced to the blast furnace, it reacts with oxygen to give carbon monoxide.
• Carbon monoxide reacts with haematite or iron ore into metallic iron by reduction.
• Limestone is added to the furnace to remove impurities.
• Limestone is a flux, it reacts with impurities (gangue) like silicon dioxide present along with the ore to give slag (calcium silicate)

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