METHOD OF STEEL CASTING IN ARC STEEL FURNACE Russian patent published in 2013 - IPC C21C5/52 

FIELD: metallurgy.

SUBSTANCE: proposed method comprises feeding metalised pellets via axial holes in graphite electrodes into slag melt of furnace bath under-electrode zone. Carbon-bearing powder and inert gas or gas mix are fed via said axial holes into metalised slag together with aforesaid pellets. Consumption of carbon-bearing powder is defined by the formula where is consumption of carbon-bearing powder, losses of carbon from electrodes oxidation in slag melt and carbon feed into under-electrode zone of furnace bath on melting metalised pellets therein, kg/melting. Consumption of inert gas is set on the basis of volume formed in under-electrode zone where ΔV_b is change in volume of said zone, m³/min; d_e is electrode OD, m; H_s is electrode penetration into bath slag melt, m; τ is time, min.

EFFECT: higher durability of electrode, power savings.

3 cl, 2 dwg, 1 tbl