We recently ran into unusual slag buildup problems in a No. 6 fuel oil-fired utility boiler. The fuel oil contained 20-40 ppm of silica and alumina. Can you point me to references or information on the effect of Si and Al on slag formation? The dominant slag forming species are vanadium oxides and sulfur oxides (SO2, SO3)?
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Rakesh Gupta Forum Moderator 29 Posts
Re: Unusual slag formation18 October 2006 at 1:29pmSlag formation occurs due to accumulation of inorganic materials such as vanadium pent oxide, alumina or silica. This is due to presence of vanadium, aluminum or silicon in the fuel oil. Presence of sulfur does not contribute to slag formation from my experience. However, it does contribute to corrosion and pollution. My suggestion for you is to have the slag analyzed for its constituents. I dont have any published references on this subject.