The invention relates to a covering means for a top slag of a metallic molten bath in a metallurgical vessel, particularly one used in the steel industry, containing a material, which melts on the molten bath and which performs metallurgical work. This material is comprised, in essence, of porous granular material whose porosity is such that, at the molten bath temperature, it forms a liquid slag melt layer on the molten bath together with a heat insulating layer comprised of the granular material. The invention also relates to a method for producing the covering means and to the use thereof. |