Method for Melting Metal Material in a Melting Plant and Relative Melting Plant

摘要

Method for melting metal material in a melting plant comprising at least an electric furnace having at least a shell into which said metal material is introduced, and feed means to load said metal material into said shell, said method comprising at least a step of loading said metal material into said shell by means of said feed means, a melting step in which said metal material is melted, and a subsequent tapping step in which the molten metal material is tapped.

主权项

1. Method for loading and melting metal material in a melting plant comprising at least an electric furnace having at least a shell into which said metal material is introduced, and feed means to load said metal material into said shell said loading and melting method comprising at least a step of loading said metal material into said shell by means of said feed means, a loading and melting step in which said metal material is melted, and a subsequent tapping step in which the molten metal material is tapped, characterized in that during said loading step at least a first substep is provided in which said metal material is loaded inside said shell to generate an initial accumulation of solid material inside said shell comprised between 25% and 45% of the overall quantity of molten material contained inside the furnace before the tapping and which will be tapped at the end of the melting cycle, at least a subsequent second loading and melting substep in which the load with which said metal material is unloaded into the shell is reduced by a control device in such a way that the load of metal material that is charged into the electric furnace in said substep substantially corresponds to the quantity of metal material that is melt, so as to maintain, inside the metal bath that is gradually formed, a quantity of solid mass of said metal material, substantially equal to the quantity of metal material that defines said initial accumulation, and a third substep in which the feed load is further reduced until the loading process is stopped, to allow all the metal material present in the furnace to be completely melted, wherein the tapping step takes place when the whole solid mass has melted.