Slagging and fouling in coalfired boilers (Technical ...
Apr 15, 2009 · Excessive ash deposits on a coalfired boiler's heat transfer surfaces will reduce its efficiency, and in extreme cases a boiler can be shut down by ashrelated problems. Ash deposits are known as slagging and fouling deposits according to their loion within the boiler, and have the most serious impact on boiler operation in terms of cost.