FIELD: drying of liquid raw materials. SUBSTANCE: cooling or heating drum has casing that functions to provide heat transfer between working liquid applied to its interval or external side and raw material in the form of seamless band applied, respectively, to opposite side: it also has pulleys 3, 4 whose perimeter is smaller than that of seamless band 2 placed on end portion of drum facilities 5 for split and tight tensioning of seamless band 2 are arranged over external perimeter of pulleys. EFFECT: improved drying conditions. 10 cl, 3 dwg
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