Jacking frame is an important component of large Prebaked Cell for Aluminum-reduction.,

Aluminum reduction cells today are of two types: those with prebaked anodes and those with baked-in-place anodes (Soderberg). Both types of anodes are made of baked petroleum coke and coal-tar or petroleum pitch. Prebaked anodes are baked in brick-lined pits and the hydrocarbon off gases can be captured and burned. Soderberg anodes are baked by the heat generated in the cells, and the off gases are more difficult to collect. Environmental restrictions in more advanced countries have halted construction of Soderberg cell plants