Which is not a high alumina refractory ?
Correct answer: D. Dolomite
- A. Mullite
- B. Corundum
- C. Bauxite
- D. Dolomite
Explanation
Mullite, corundum, and bauxite are alumina-rich refractory materials. Dolomite is mainly calcium and magnesium carbonate, converted to CaO-MgO on firing, so it is not classified as a high-alumina refractory.
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