CATHODE BOTTOM, METHOD FOR PRODUCING THE CATHODE BOTTOM AND APPLICATION OF THE LAST IN THE ELECTROLYTIC CELL FOR THE PRODUCTION OF ALUMINUM

摘要

1. The cathode bottom (1, 21, 31, 41, 51, 61) for an electrolytic cell for aluminum production, including material (3, 23, 33, 43, 53, 63), made with the possibility of attaching at least to one cathode block (7, 27, 37, 47, 57, 67), characterized in that the material (3, 23, 33, 43, 53, 63) includes a pre-compressed expanded graphite plate. 2. The cathode bottom (1, 21, 31, 41, 51, 61) according to claim 1, characterized in that the material made with the possibility of attaching to one cathode block consists of a pre-compressed plate of expanded graphite. 3. The cathode bottom (1, 21, 31, 41, 51, 61) according to claim 1, characterized in that the pre-compressed plate is made in the form of a foil. The cathode bottom (1, 21, 31, 41, 51, 61) according to claim 1, characterized in that at least one cathode block (7, 27, 37, 47, 57) is placed at a certain distance from at least one more cathode block (7, 27, 37, 47, 57), so that at least one gap is formed between them (5, 25, 35, 45, 55, 65, 65), at this material (3, 23, 33, 43, 53, 63) fills the gap (5, 25, 35, 45, 55, 65) .5. The cathode bottom (21) according to claim 4, characterized in that one surface of the cathode block (27), located opposite the surface of another cathode block (27), has a structured surface. The cathode bottom (21) according to claim 4, characterized in that one surface of the cathode block (27), located opposite the surface of another cathode block (27), has at least one recess (211) .7. The cathode bottom (41) according to claim 4, characterized in that the material (43) is located on two opposite surfaces of the cathode blocks (47), which are adjacent surfaces of the cathode blocks (47), forming a gap (45), and inside