Scaling of furnace stock is reduced by _______________ in flue gas?
Correct answer: D. All A., B. & C.
- A. CO
- B. H2
- C. High CO/CO2
- D. All A., B. & C.
Explanation
Scaling is oxidation of hot stock, so it is reduced by a reducing furnace atmosphere supplied by CO or H2; a high CO-to-CO2 ratio also indicates reducing conditions. Thus all listed measures help suppress scale formation.
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