Hard coke is produced starting from___________________?
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Answer: B. Bituminous coal
Explanation
Hard metallurgical coke requires the high-temperature carbonization of bituminous coal. Bituminous coking coal softens and fuses to form a strong, cellular carbon structure. Lacking this thermoplastic behavior, other coal ranks cannot form hard industrial coke. Hard coke production heats bituminous coal up to one thousand degrees in recovery ovens. Volatile matter escapes, leaving behind a porous yet strong fused carbon mass. Quenching cools the hot coke before it is screened for blast furnace use.
Blast furnaces require strong hard coke to support heavy iron ore burdens without crushing. Steel manufacturing depends entirely on this high-grade carbon reducing agent. Bituminous coal reserves dedicated to coking are a critical industrial resource. Lignite yields weak chars and lacks the coking properties needed for hard metallurgical coke. Semi-anthracites do not possess the thermoplastic softening range required for fusion. Anthracites are completely non-caking and remain granular during high heat treatment.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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