DEVICE FOR COLLECTING THE SOLID DEBRIS PRESENT IN THE BATH AND LIQUID METAL OF AN ELECTROLYSIS TANK INTENDED FOR THE PRODUCTION OF ALUMINUM BY SCRAPPING THE BOTTOM OF THE SAME

摘要

A collection unit (100), in particular a crust scoop (100 ') for cleaning anode holes, comprising a movable vertical mast (9 ") actuated by a first actuator (50), a chassis (110) attached to said mast movable vertical and at least one bucket (120a, 120b) hinged, characterized in that said first actuator (50) is at least one hydraulic cylinder (51) fed by a hydraulic circuit arranged such that, at least when a second actuator actuates said bucket, the oil pressure in the shaft-side chamber (53) is maintained at a substantially constant value to support a load corresponding to the weight of said collection unit, minus a predetermined value effort, preferably less than 1000 daN, typically between 200 and 600 daN Advantageously, the circuit portion (63) supplying said rod-side chamber is provided with a pressure regulator (70). r debris by scraping the bottom of the tank without damaging it.