FIELD: construction.
SUBSTANCE: method to process ash and slag wastes on coal thermal power plants equipped with boilers with liquid or solid slag removal, for their subsequent industrial recycling and/or piling consists in the following. Liquid slag or molten solid slag is converted into condition suitable for industrial recycling and/or piling by means of quick cooling of slag melt by air-water jets during its aerohydrodynamic spraying. To produce a binding component of processing of fly ash, they perform fine dry grinding of the required quantity of the produced solid granulated slag, if necessary, with additives of hardening activators with subsequent mixing of the grinding product during intense mixing with water and fly ash at the following ratio of components: fly-ash 72-81 wt %, slag binder 18-9.0 wt %, water - not more than 10 wt %, additives-activators of hardening - up to 0.5 wt %. Simultaneously with intense mixing of the specified components they perform granulation of the mixture, then thermal treatment of produced raw granules of the processed fly ash is carried out with steam, generated in process of cooling of the specified slag melt. The fly ash processed in this manner before industrial recycling or piling is exposed to regulated cooling.
EFFECT: recycling of by-products - fly ash and slag produced when fuel is burnt at coal TPPs.
8 cl, 1 dwg
