Ash and slag materials (ASM), formed during the combustion of coal in thermal power plants, have abrasive properties, which are manifested during the operation of boiler units, ash collection, ash and slag removal. These properties must be considered to ensure durable trouble-free operation of thermal power plants. On the other hand, these properties can be used when planning measures for ash and slag material disposal. The results of experimental-industrial tests of ash and slag materials abrasive properties are presented in this paper. It was shown that, when cleaning metal surfaces of various shapes from old paint coatings, the consumption of crushed coal slag per 1 m2 of the surface being treated is on average 4.8 times less than the consumption of sand, the time of surface treatment with slag is on average 2.45 times less than with the use of sand in similar conditions. The empirical formulas to evaluate the technical and economic efficiency of using ash and slag materials as an abrasive in industrial applications are given.
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