Caking index of the coal blend used for the manufacture of metallurgical coke should be around__________________?
Correct answer: B. 21
- A. 5
- B. 21
- C. 40
- D. 48
Explanation
A caking index near 21 indicates adequate plasticity and bonding ability for a metallurgical coke blend. Very low values give poorly bonded coke, while excessively high values can cause swelling and oven-wall pressure.
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