Question:
The Alumina content in High Alumina refractory should be more than
The Alumina content in High Alumina refractory should be more than
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High alumina refractories contain more than \(45\%\) alumina.
Updated On: May 7, 2026
- \(10\%\)
- \(25\%\)
- \(15\%\)
- \(45\%\)
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The Correct Option is D
Solution and Explanation
Concept:
High alumina refractories are alumino-silicate refractories with alumina content higher than that of ordinary fireclay refractories.
Step 1: Fireclay refractories usually contain alumina in the range: \[ 25-45\% \]
Step 2: If the alumina content is more than the upper limit of fireclay refractories, the material is classified as high alumina refractory.
Step 3: Therefore, high alumina refractories contain more than: \[ 45\% \ Al_2O_3 \] Hence, the correct answer is: \[ \boxed{45\%} \]
Step 1: Fireclay refractories usually contain alumina in the range: \[ 25-45\% \]
Step 2: If the alumina content is more than the upper limit of fireclay refractories, the material is classified as high alumina refractory.
Step 3: Therefore, high alumina refractories contain more than: \[ 45\% \ Al_2O_3 \] Hence, the correct answer is: \[ \boxed{45\%} \]
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