Caking index of coal blend used for blast furnace coke making is about_________________?
Correct answer: C. 22
- A. 8
- B. 12
- C. 22
- D. 36
Explanation
A blast-furnace coke blend generally requires a caking index near 20 to ensure that the coal particles soften, fuse and form strong coke. The approximate value is therefore 22.
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