| 摘要 |
A cathode structure 11 of length x and width (figure 1a, y) where x > y, for an electrolytic cell comprising a plurality of parallel cathode blocks of length (figure 1a, a) and width (figure 1,b), where a > b. The structure extends over substantially the whole length x of said cell, where y ~ a. The cathode structure 11 comprises a majority of so-called standard cathodes (figure 1, 2) of height Cs and a minority of so-called tall cathodes 12 of height cT. The flat upper surface of said standard cathodes 2a forms at least one so-called high portion 30c at a height cS, and the flat upper surface of said tall cathodes forms at least one so-called high portion 31a at a height cT, where cT > cS. Each high portion has a width yH ~ y, and each low portion has a width yL ~ y. Each low portion 30 extends over at least two adjacent standard cathode blocks such xL ≥ 2 b where xL is the length of the low portion. At one high portion may have a chamfered or bevelled edge. The cathode structure may have a high portion of the upper cathode surface that is not more that 40% of the total surface. The cell can be a cell used in Hall-Heroult process. |
