Si percentage in silica refractories used in the walls of coke oven is about______________________?
Correct answer: D. 95
- A. 45
- B. 60
- C. 80
- D. 95
Explanation
Silica bricks used in coke-oven walls are highly silica-rich, normally containing about 95% SiO₂. This high purity gives them the refractoriness and resistance needed for coke-oven operation.
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