Addition of zircon to silica refractory brick improves its_____________________?
Correct answer: B. Resistance to slag attack
- A. Crushing strength
- B. Resistance to slag attack
- C. Both A. and B.
- D. Neither A. nor B.
Explanation
Zircon improves the chemical stability of silica refractories against slags, especially by reducing penetration and reaction with the brick. Its main recognized benefit here is slag resistance, not a simultaneous assured increase in crushing strength.
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