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What kind of refractory can bauxite be grouped as?

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What kind of refractory can bauxite be grouped as?

(a) Acid refractory

(b) Basic refractory

(c) Neutral refractory

(d) Silica refractory

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This interesting question is from Properties of Refractories topic in section Refractories & Dielectric Materials of Engineering Material & Metallurgy

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Right choice is (b) Basic refractory

To explain: Basic refractories are those which are rich in periclase or magnesia, sometimes with calcium, chromium, and other irons. The presence of silica in these may pose a threat to their performance. Magnesia and bauxite are examples of basic refractories.

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