Reducing corrosion in waste heat boilers

The corrosion of waste heat boilers (WHBs) – which are crucial in the recovery and use of heat generated as a by-product by non-ferrous pyrometallurgical plants globally – has a detrimental impact on asset life and overall performance, according to international surface protection solutions provider Integrated Global Services (IGS).  The flue gas stream within a smelting furnace WHB has comparatively high dust content, that may either slag on the surface depending on its melting point temperature or erode waterwalls. In general, metal oxides are present in the dust and are characterised as very erosive media.