Roof of a basic electric furnace is made of _____________ bricks?
Correct answer: B. Silica
- A. Superduty fireclay
- B. Silica
- C. Chromite
- D. None of these
Explanation
Silica bricks are traditionally used in basic electric-furnace roofs because they withstand the high operating temperature and have good resistance to thermal shock in this service. Superduty fireclay is more commonly used in less severe furnace zones.
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