Which is a neutral refractory ?
Correct answer: A. Graphite
- A. Graphite
- B. Magnesite chrome
- C. Silica
- D. Magnesia
Explanation
Graphite is generally classified as a neutral refractory because it is not appreciably attacked by either acidic or basic slags under suitable conditions. Silica is acidic, while magnesia is basic; magnesite-chrome is usually basic.
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