The present disclosure discloses methods and systems for removing dross from a liquid metal chamber, such as would be used in magnetohydrodynamic (MHD) or metal 3D printing. The method and systems comprise inserting a dross removal tool into a liquid metal chamber. A seal is compromised, fluidically connecting an evacuated volume and the liquid metal chamber. Pressure equalizes between the fluidically coupled volumes through an inflow of gas, liquid, and solid components from the liquid metal chamber into the dross removal tool. The dross removal tool is removed from the liquid metal chamber.

A slag door for a melting furnace for the production of steel is suitable to be associated with an aperture provided in a lateral wall of the melting furnace and to cooperate with a slag channel provided inside the melting furnace itself.

A slag door for a melting furnace for the production of steel is suitable to be associated with an aperture provided in a lateral wall of the melting furnace and to cooperate with a slag channel provided inside the melting furnace itself.

A scum removal device according to the present disclosure includes a snout, a discharge section, and a suction section. The discharge section is disposed on an extension line of a steel strip entry position on a hot-dip plating bath surface at one side in a steel strip width direction, and discharges a liquid metal for hot dipping. The suction section is disposed on the extension line on the hot-dip plating bath surface at another side in the steel strip width direction, and sucks in the liquid metal for hot dipping. The suction section is configured by a first suction portion and a second suction portion. The first suction portion and the second suction portion are disposed separated from each other at each side of the steel strip width direction extension line of the steel strip entry position on the hot-dip plating bath surface.