What is the typical abrasion index percentage for blast furnace coke_____________?
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Answer: D. 80
Explanation
Blast furnace coke must withstand severe mechanical stresses without breaking down into fine dust. Tumbler test procedures measure the physical durability and strength parameters of metallurgical coke samples. High percentage ratings indicate excellent resistance to impact and abrasion inside tall furnaces. Metallurgical coke acts as both a chemical reductant and structural support in ironmaking. Tumbler drums rotate coke samples under standardized conditions to simulate burden movement forces. Standard testing metrics evaluate tumbler stability and abrasion indices for quality control purposes.
Weak coke would crush under the massive weight of iron ore inside blast furnaces. Fine dust blocks gas permeability and disrupts smooth countercurrent airflow during smelting operations. Steel producers rely on strict abrasion index standards to guarantee stable blast furnace performance. Option A represents an inadequate strength level that would cause catastrophic furnace choking. Option B is too low for heavy industrial blast furnace burden support requirements. Option C still falls short of the stringent mechanical durability standards demanded by operators.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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