Magnetic field around the aluminium electrolysis cells

Two magnetostatic applications are reported, related to the magnetic field around the aluminium electrolysis cells. The first exhibits the magnetic field created by the current carrying parts in the cell neighbourhood, by taking into account the influence of the magnetic bodies. The second is referring to a magnetostatic shield with double walls, designated to protect the electronic data acquisition equipment when is used in this environment. As introduction, some features are presented and discussed for three models used in the field calculation of magnetically polarised bodies and the algorithm of iterative calculation in spaces with sparse magnetic bodies.