Formation of electrocontact plugs of anodes of metallurgical production

A method for making electrocontact plugs (ECPs) in anodes for aluminium and magnesium electrolyzers using the pulsed magnetic field (PMF) action on the metal melt was proposed. Different variants of plug construction are presented. Technology for making ECPs under laboratory conditions was developed. IFU brand coal-coke material was used in the experiments as an anode material; a casting aluminium alloy of an Al-Si system was used for ECPs. The results of experimental investigations are given and an assessment of the quality of the electric contact was carried out. It was found that the contact resistance of the contact produced under the action of the PMF is much lower than when conventionally pouring the melt. The reduction of this factor depends on the fact that the melt fills the pores and microirregularities of the carbon block of the anode under the pressure of the PMF, which results in an increase in the physical area of the contact.