____________ of carbon blocks in the hearth of blast furnace helps in avoiding skull formation, when it becomes cold?
Correct answer: C. Non-wetting characteristics
- A. High thermal conductivity
- B. Low porosity
- C. Non-wetting characteristics
- D. High density
Explanation
Carbon blocks do not readily wet with molten iron or slag, so their non-wetting surface prevents molten material from adhering and forming a skull during cooling. High thermal conductivity and density are useful properties, but they are not the main mechanism stated here.
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