(1) The role of the slag wall is to block the slag, further remove the inclusions in the molten steel, and improve the cleanliness of the molten steel. The structure of the slag wall has a single wall or a double wall.

(2) The slag wall is made of high-aluminum bricks and is also made of high-alumina castables, which are manually inserted.

(3) In the flow steel hole of the slag-blocking wall, a ceramic foam filter or a porous filter plate and a filter tube can be placed to remove trace non-metallic inclusions in the steel to obtain ultra-clean steel.