Question:
Alumina content in Fireclay refractories is
Alumina content in Fireclay refractories is
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Fireclay refractories are alumino-silicate refractories and usually contain about \(25-45\%\) alumina.
Updated On: May 7, 2026
- \(10-20\%\)
- \(25-45\%\)
- \(60-80\%\)
- \(90-100\%\)
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The Correct Option is B
Solution and Explanation
Concept:
Fireclay refractories are alumino-silicate refractories. They contain both silica and alumina.
Step 1: Fireclay refractories are made from fireclay, which mainly contains: \[ Al_2O_3 \quad \text{and} \quad SiO_2 \]
Step 2: Alumina provides refractoriness and improves high-temperature performance.
Step 3: Silica is also present in significant amount.
Step 4: The alumina content in fireclay refractories generally lies in the range: \[ 25-45\% \] Therefore, the correct answer is: \[ \boxed{25-45\%} \]
Step 1: Fireclay refractories are made from fireclay, which mainly contains: \[ Al_2O_3 \quad \text{and} \quad SiO_2 \]
Step 2: Alumina provides refractoriness and improves high-temperature performance.
Step 3: Silica is also present in significant amount.
Step 4: The alumina content in fireclay refractories generally lies in the range: \[ 25-45\% \] Therefore, the correct answer is: \[ \boxed{25-45\%} \]
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