METHOD FOR OPTIMISING THE OPERATING CONDITIONS OF A SMOTHERED ARC FURNACE

摘要

The invention concerns a method for optimising the operating conditions of a smothered arc furnace (10) for producing liquid metal. The electric furnace comprises at least an electrode (18) and contains a molten metal bath (12) covered with a thick layer of liquid slag (16) having a surface mass of at least 1t/m<2>. The method consists in causing the slag to froth locally around said at least one electrode (18) so as to generate around said electrode (18) a local layer of frothing slag (20) wherein the density of the slag is at least 50 % lower than in the rest of the furnace.