METHOD OF STEEL MAKING IN ARC-TYPE FURNACE Russian patent published in 2013 - IPC C21C5/52 F27B3/10 

FIELD: metallurgy.

SUBSTANCE: invention refers to methods of steel making in electric furnaces with consumable electrodes submerged into molten slag at continuous supply of iron-rich pellets to molten slag simultaneously with carbon-containing material, gas through an axial hole in the electrode. Inert gases or mixture of inert and reducing gases are used as gas; separate supply of iron-rich pellets and carbon-containing material in flow of inert gas or mixture of inert and reducing gases is performed through a cone of electrically insulating material with connection pipes, which is installed in axial hole of the electrode above an electrode holder, and melting is performed considering the consumption of carbon-containing material, loss of carbon as a result of electrode oxidation in slag, and supply of carbon to under-electrode zone at melting of pellets in it.

EFFECT: invention allows increasing the stability of end part of the electrode, as well as increasing the heat supply to pellet melting zone under reducing atmosphere conditions.

1 dwg