Vacuum steel degassing units are lined with__________________?
Correct answer: C. High alumina bricks
- A. Silica bricks
- B. Low duty firebricks
- C. High alumina bricks
- D. Graphite blocks
Explanation
High-alumina bricks withstand the severe temperatures, chemical attack, and vacuum conditions of steel degassing better than ordinary silica or fireclay bricks. Graphite can be used in some furnace parts, but it is not the standard lining answer here.
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