Graphite or carbon refractories______________________?
Correct answer: A. Should be used in neutral or reducing atmosphere
- A. Should be used in neutral or reducing atmosphere
- B. Exhibit wetting characteristics
- C. Exhibit high shrinkage on thermal treatment
- D. Are not resistant to corrosion by slag
Explanation
Carbon and graphite oxidise readily in air at high temperature, so they are used in neutral or reducing atmospheres. They have poor wetting by many molten materials, low thermal shrinkage and good slag resistance.
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