Fusion point of an acidic refractory material is________________?
Correct answer: B. Reduced by the addition of basic oxides
- A. Increased by the addition of basic oxides
- B. Reduced by the addition of basic oxides
- C. Not affected by the addition of basic oxides
- D. Always more than 2500°C
Explanation
Basic oxides react with an acidic refractory and commonly form lower-melting eutectic mixtures, reducing its fusion temperature. This is why acidic refractories are unsuitable for contact with strongly basic slags.
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