Advanced refractory layout of suspension preheaters.

The clinker burning process in modern kiln lines, with multi staged preheating towers under the use of high rates of alternative fuels and raw materials, needs special attention regarding several possible wear phenomena of refractory and the steel structure itself. Analyses of refractory installations with long term running time experiences of worldwide customers of Refratechnik company, guided its specialists to new concepts and layouts for special areas of preheating towers. Focused on steel shell corrosion the authors give examples about the corrosion mechanism, and adapted refractory concepts are presented to avoid steel shell corrosion. An outlook is given about an advanced possible solution where the energy saving aspect is taken into account.

Author: S. Thomas, H. Walter, G. Pair

Section: Refractories

Keywords: refractories, suspension preheater, calciner, refractory corrosion, steel corrosion.