Method and apparatus for dynamic selection of electric arc-furnace control set-points

An electric arc furnace, comprising:

• a set of mast hydraulics;
• a current transformer;
• a voltage transformer;
• a legacy control system in control of the set of mast hydraulics of the electric arc furnace, said legacy control system receiving information from said current transformer relative to current being supplied to the electric arc furnace and from said voltage transformer relative to voltage being applied to the electric arc furnace, said legacy control system having a memory containing a set of set-points for the control of the set of mast hydraulics, the voltage and the current of the electric arc furnace;
• and
• a set-point modifier in communicative connection with said legacy control system, said set-point modifier being configured to execute the steps of:
• evaluating a cost function of key performance indicators of at least one previous heat of the electric arc furnace, the key performance indicators including at least one of electrical energy use and electrode consumption;
• and
• altering said set of set-points dependent upon said cost function.