Refractoriness under loads (RUL) is quite close to the fusion temperature (PCE) for _____________ bricks?
Correct answer: D. Silica
- A. Fireclay
- B. Very low alumina
- C. Dolomite
- D. Silica
Explanation
Silica refractories have a sharp melting behaviour, so their refractoriness under load lies relatively close to their PCE or fusion temperature. Fireclay and other aluminosilicate bricks soften over a broader temperature range.
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