Energy efficient solutions of DC Electric Arc Furnace Bottom Electrode
Keywords:DC ELECTRIC ARC FURNACE, ELECTROVORTEX FLOWS, BOTTOM ELECTRODE, PHASE TRANSITION, COPPER-STEEL TRANSITION ZONE, ENERGY EFFICIENCY
Numerical studies of electrovortex flows (EWF) in the steelmaking bath of DC electric arc furnace and heat transfer with a phase transition through bottom electrode (BE) were carried out. The heat flux density through BE and local EVF velocity in anode well are 1.8–2 MW/m2 and 0.75 m/s, respectively. The equilibrium thickness of solid steel BE part is critically dependent on the width of copper-steel transition zone, should not exceed 20-25 mm. Manufacturing technology of BE with a narrow transition zone, which ensures stable operation and increases energy efficiency of the furnace, has been improved.
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