CATHODE STRUCTURE, ALUMINUM ELECTROLYSIS CELL, AND METHOD FOR LOWERING HORIZONTAL CURRENT IN ALUMINUM LIQUID

摘要

Disclosed is a cathode structure of an aluminum electrolysis cell, where a cathode steel bar is divided, along a height direction of the cathode steel bar from top to bottom, into at least two portions comprising an upper portion by a dividing seam in a segment close to an end portion of a cathode carbon block along the length direction, the cathode steel bar is connected to the cathode carbon block by an electric conductor in a segment in a middle part of the cathode carbon block which is not divided, the upper portion of the cathode steel bar that is close to the end portion of the cathode carbon block and is divided is connected to the cathode carbon block by an electric conductor, the other portions that are located below the upper portion is insulated from the cathode carbon block by using an insulator, and the dividing seam is filled with a dividing seam insulating material. Disclosed are also an aluminum electrolysis cell comprising the cathode structure and a method for lowering a horizontal current in an aluminum liquid. Through the present invention, the horizontal current in the aluminum liquid is greatly lowered, so that the distribution of cathode current becomes more even, the stability of the electrolysis cell is improved, the service life of the cell is prolonged, the energy consumption per ton of aluminum is effectively lowered, and a significant energy saving effect is achieved.