FIELD: mining industry; may be used in mining of solid minerals from bottom of ocean. SUBSTANCE: method includes additional treatment with liquid streams of ferromanganesian concretions with silt found on tray directed from the tray load-carrying surface. For which purpose, vibrating tray is provided with conical holes whose axes are located at acute angle to load-carrying surface towards side of concretion transportation. EFFECT: higher efficiency. 3 cl, 3 dwg
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