In the blast furnace, incorporation of water vapour in the blast gives the following effect ?
Correct answer: D. Increases the reducing potential of the gas
- A. Increases the hydrogen content in the metal
- B. Increases the flame temperature
- C. No significant change occurs
- D. Increases the reducing potential of the gas
Explanation
Steam reacts with hot carbon to form carbon monoxide and hydrogen, and hydrogen acts as an additional reducing gas in the furnace. Steam generally lowers flame temperature rather than increasing it, so the reducing potential rises.
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