A continuously operating method for producing refined metal

摘要

The invention relates to a continuously operating method for removing impurity gases dissolved in metal by using a reactant (7) that remains in a solid state and is lighter than the metal to be refined. In the method, at least flows (P) of molten metal are generated in the molten metal (M) by electromagnetic induction or metallostatic pressure. The light reactant is kept in contact with the melt by using a float (4), which is at a predefined or adjustable height in relation to the surface of the molten metal, the height being smaller than the thickness (H2) of the reactant layer on the surface of the melt. The light reactant (7) is fed below the float so that at least part of the thickness of the reactant layer extends below the surface (L) of the molten metal, whereby the light reactant is able to react with the said impurity gas and the reaction results exit the melt.