Dust content in raw blast furnace gas is about _______________ gm/Nm3; hence it is cleaned to the dust level of about < 10 mg /Nm3 before use?
Correct answer: A. 15-30
- A. 15-30
- B. 1-2
- C. 70-100
- D. 150-200
Explanation
Raw blast-furnace gas carries roughly 15 to 30 g of dust per Nm³, mainly fine ore, coke and ash particles. Gas cleaning reduces this to below about 10 mg/Nm³ for safe downstream use.
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