Which property of refractories is the most important for top section of the blast furnace ?
Correct answer: B. Resistance to abrasion
- A. Resistance to slag penetration
- B. Resistance to abrasion
- C. Stability of volume at high temperature
Explanation
The upper blast-furnace region is subjected mainly to impact and rubbing from descending solid burden, so resistance to abrasion is especially important there. Slag penetration is more critical in zones contacting molten slag and metal.
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