Carbon refractories_____________________?
Correct answer: C. Are not attacked by slags, as they are not wetted by melts
- A. Do not burn/oxidise, when exposed to air on heating
- B. Do not resist temperature fluctuations
- C. Are not attacked by slags, as they are not wetted by melts
- D. Have extremely low thermal & electrical conductivities
Explanation
Carbon refractories are poorly wetted by most molten slags, so slag penetration and attack are limited. They do oxidise in air at high temperature and have relatively high thermal and electrical conductivities, making the other statements unsuitable.
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