In which furnace zones are magnesite bricks predominantly installed __________________?
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Answer: B. Required to resist corrosive basic slag
Explanation
Magnesite bricks are premier basic refractories designed specifically to withstand corrosive basic operating slags. They are predominantly installed in furnace zones where alkaline fluxes would rapidly destroy acidic brick linings. Their high concentration of magnesium oxide provides excellent chemical resistance against basic metallurgical environments. Basic refractories are chemical compounds rich in alkaline earth metal oxides like periclase and dolomite. Slag corrosion occurs when liquid fluxes dissolve refractory lining materials through high-temperature chemical reactions. Furnace lining longevity depends directly on choosing chemically compatible refractories for specific slag conditions.
Basic oxygen steelmaking furnaces utilize magnesite bricks to withstand aggressive basic refining slags safely. Preventing chemical slag attack avoids premature furnace downtime and expensive refractory replacement cycles. Metallurgical engineers design multi-layer furnace linings tailored to the distinct chemical zones of the vessel. Option A is incorrect because magnesite bricks have poor resistance to thermal fluctuations and tend to spall. Option C is incorrect because basic bricks are chosen primarily for chemical slag resistance rather than load strength. Option D is incorrect because magnesite bricks are predominantly installed to resist corrosive basic slag.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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