Roof of a basic open hearth furnace is lined with ______________ bricks?
Correct answer: A. Silica
- A. Silica
- B. Fireclay
- C. Dolomite
- D. Magnesite
Explanation
Silica bricks withstand the high temperature and acidic conditions in the roof of a basic open-hearth furnace. Fireclay is less refractory, while magnesite and dolomite are basic refractories generally used in zones contacting basic slags.
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