Patent ID: 8967166
Filing Date: 2015-03-03
Classification: B03B,B07B,B08B,B09C

Abstract:
1. A washer comprising: a horizontal rotary drum in which materials to be treated are adapted to be introduced through a feed hopper together with a water flow admitted through treatment nozzles so as to form a suspension of water and materials, inclined paddles arranged inside the drum, the inclined paddles configured to move forward heavy materials deposited on the bottom of the drum towards an exit end of the drum, an extractor and concentric screening means, the extractor connected to the drum at the exit end and configured to convey the heavy materials towards the concentric screening means, a first nozzle for admission of water for counter-current washing of the treated materials arranged just upstream of said extractor, and a stop member arranged transversally inside the drum so as to leave only a peripheral annular passage having a height lower than the level of the suspension of water and materials present on the bottom of the drum.