METHOD AND DEVICE FOR DESTRUCTION OF ELECTROLYTE CRUST BY PLASMA SEPARATION CUTTING Russian patent published in 2019 - IPC C25C3/14 

FIELD: technological processes.

SUBSTANCE: invention relates to a method and a device for destroying an electrolyte crust in electrolysis cells for producing aluminum of all types. Method includes destruction of electrolyte crust by plasma separating cutting by thermal melting of crust material by high-speed high-temperature concentrated flow of thermal energy of thermal plasma jet, for this purpose creating directed jet of thermal plasma and moving it above crust of electrolyte along preset path, formed melted material is continuously removed from the zone of action of the thermal plasma jet with formation of a slit of thermal plasma of the slit in the electrolyte crust sufficient to provide for successive separation cutting of the crust and its destruction. Disclosed is a device for plasma separation cutting, comprising plasmatron, fixed on boom of manipulator with possibility of its movement with specified speed along cutting path and maintaining gap between plasmatron tip and crust of electrolyte at movement along surface of crust of electrolyte with complex relief.

EFFECT: reduction of volume of the destroyed crust of electrolyte, exclusion of formation of pieces of crust of electrolyte at its destruction and, as a result, reduction of power consumption for heating of covering material, consisting of mixture of alumina and crushed electrolyte, used for formation of crust of electrolyte.

14 cl, 3 dwg