Presence of phosphorous in metallurgical coal__________________?
Correct answer: C. Badly affects the quality of steel
- A. Is not undesirable
- B. Reduces its calorific value
- C. Badly affects the quality of steel
- D. Increases its caking power
Explanation
Phosphorus from metallurgical coal can enter the molten iron and makes steel brittle, especially at lower temperatures. It is therefore an undesirable impurity in steelmaking coal.
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