Calorific value of of blast furnace gas is around __________ KCal/Nm3. August 17, 2022 by admin Question: Calorific value of of blast furnace gas is around __________ KCal/Nm3. [A]. 850 [B]. 1800 [C]. 4200 [D]. 6500 Answer: Option A Explanation: No answer description available for this question.