What collects on upper furnace tubes, causing oxidation failures and critically attacking refractory insulation?
A. Excess fuel
B. Nitrogen oxide
C. Vanadium ash
D. Carburization
A. Incorrect. Vanadium ash collects on upper furnace tubes, causing oxidation failures and critically attacking refractory insulation.
B. Incorrect. Vanadium ash collects on upper furnace tubes, causing oxidation failures and critically attacking refractory insulation.
C. Correct. Vanadium ash collects on upper furnace tubes, causing oxidation failures and critically attacking refractory insulation.
D. Incorrect. Vanadium ash collects on upper furnace tubes, causing oxidation failures and critically attacking refractory insulation.
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