Electrolytic aluminum production plant, includes cutting tool for breaking up crust around anode having base region forming electrode for accurate measurement of molten aluminum layer thickness

摘要

In an electrolytic aluminum production plant including a cathodic vessel (1), an anode (2), a cutting tool (9) for breaking up the crust (5) formed in the anode region and an electronic unit (11) for generating an alternating current and measuring the current and/or potential between the cutting tool and cathodic vessel, the base region of the cutting tool forms an electrode, electronically connected to the electronic unit. An aluminum production plant comprises a cathodic vessel (1) and an anode (2), between which direct current is passed from an electricity source to obtain molten Al from a bath (4). A unit (6) for breaking up the crust (5) formed in the anode region has a cutting tool (9), which is operated by a pneumatic cylinder (7) (with a sensor (12) for determining the stroke of the cylinder piston rod (8)) and is electrically connected to an electronic unit (11) (also electrically connected to the cathodic vessel), for generating an alternating current and measuring the current and/or potential between the cutting tool and cathodic vessel. The novel feature is that the base region of the cutting tool forms an electrode, electronically connected to the electronic unit.