Essential Chemistry for IGCSE - Metal Extraction (Section 2 - No. 35)
Which of the following best describes the role of flux in the blast furnace?
To increase the amount of iron produced.
To remove impurities and form slag.
To provide carbon monoxide for reduction.
To lower the melting point of iron.
Explanation
The flux (like limestone) reacts with impurities, forming a molten slag that can be removed.
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