FIELD: power engineering and building material industry. SUBSTANCE: device has furnace, liquid-bath precombustion chamber, slag remover, melting furnace, drier, tap hole for removing molten ash slag. Method involves slag after-burning in melting furnace where slag comes through slag remover, delivery of gas generation products to melting furnace from precombustion chamber, pre-drying in drier by heat produced by boiler exit gases. EFFECT: facilitated procedure of coal-ash slag reconditioning. 2 cl, 1 dwg
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