PUNCH OF SYSTEMS FOR AUTOMATICALLY SUPPLYING ALUMINA IN ALUMINUM CELLS Russian patent published in 2001 - IPC

FIELD: equipment for maintaining electrolyzers, namely in processes for producing aluminum. SUBSTANCE: punch includes elongated housing with closed and open ends, pneumatic cylinder with rod jointly connected with one end of punch. Other end of punch is mounted in guiding unit with possibility of axial motion through open end of housing and engagement with electrolyte skin. Punch is provided with unit for controlled limitation of rod axial stroke. Said unit is in the form of stopper, pivot and supporting strips for placing stopper arranged along housing and secured to its walls. Articulation joint of rod is provided with flange engaging with stopper. It is possibly to regulate depth of punch immersion that allows to decrease labor consumption for maintenance. EFFECT: fail-safe operation of system for automatically supplying alumina at changing melt level in cell. 4 cl, 2 dwg