Heimgartner, P.
July 1997
Fuel and Energy Abstracts, vol 38-4, p. 246
A correlation was determined between the corrosion of metallic structures in a cement kiln with excessive accumulation of chlorides and sulfates near the outlet arid around the pre-heater area. The use of fuels with high levels of S and Cl resulted in increased accumulation of corrosive salts. Condensation of aqueous solutions of hydrochloric and sulfuric acids forming from the salts on the metal surface behind refractory bricks and combustion gas diffusion through the bricks are the main corrosion agents. The use of anti-corrosive heat-resistant coatings, applied by atomization spraying is a preferred route for protection of metallic components of kilns under the conditions described.
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