Rotary kilns in cement industry are lined with _____________bricks?
Correct answer: A. High alumina & high magnesia
- A. High alumina & high magnesia
- B. Silica
- C. Lead
- D. Fireclay
Explanation
Cement-kiln linings face high temperature, abrasion and attack by basic clinker materials, so durable high-alumina and high-magnesia refractories are used. Ordinary fireclay or silica bricks are less suitable for these severe basic conditions.
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