High-temperature corrosion of metal during combustion of coal with high salt content

Keywords

salty coal, burning, slagging, corrosion, coal blend.

Cite as

Shendrik T. G., Dunayevska N. I., and Fateiev A. I. High-temperature corrosion of metal during combustion of coal with high salt content. Physicochemical Mechanics of Materials. 2024. 60(2), 020-028.

https://doi.org/10.15407/pcmm2024.02.020

Abstract

The modern mechanisms of corrosion processes during the burning of carbon raw materials (biomass waste, coal of various metamorphisms) with a high content (Na₂O in ash ≥2%) of low-melting salts and sulfur are considered. The morphological features of deposits on the surface of the metal exposed to the high-temperature combustion gases of the salty coal (SC) before and after desalination and also composition of corrosion pro­ducts of ferrite steel during SC ashing and its mixture with power-generating gas coal are determined. It is experimentally shown that extraction of water-soluble compounds from SC (on the example of deposits of Northern Donbass) and its mixture with coal of low salinity lead to a significant reduction in corrosion of heating surfaces during burning.

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