RU94043005A - Method for melting of naturally alloyed steels and alloys in hearth furnaces - Google Patents

Abstract

FIELD: ferrous metallurgy, melting of naturally alloyed iron-carbon steels and alloys in hearth furnaces, particularly, in open-hearth and electric furnaces. SUBSTANCE: in melting naturally alloyed steels and alloys, charged onto pad of charge materials in zones of the slowest melting of charge is carburetor in combination with materials contain compounds and/or alloys reducing and alloying elements which are covered with lime and/or limestone is separated from carburetor and materials containing reducing and alloying elements. Prolonged residence of easily oxidized alloying elements in contact with carburetor in reducing zone allows preservation of freshly reduced alloying elements in meal melt, removing of slag of the first period during the cold period without loss of these elements. EFFECT: reduced cost of steel production provision for operation on fresh charge, utilized ores and production wastes containing oxidized and reduced alloying elements.

Claims (1)

The invention relates to ferrous metallurgy, to the smelting of naturally alloyed iron-carbon steels and alloys in hearth furnaces, namely in open-hearth and electric furnaces. The essence of the invention: in the smelting of naturally alloyed iron-carbon steels and alloys, a carburetor and materials containing compounds and / or alloys of deoxidizing and alloying elements that are coated with lime and / or limestone, while lime and / or limestone is separated from the carburizer and materials containing deoxidizing and alloying elements. The long stay of easily oxidizing alloying elements in contact with the carburetor in the reduction zone allows you to keep the freshly restored alloying elements in a metal melt, remove the slag of the first period in the "cold" period without losing these elements. This technology allows to reduce the cost of steel production, to work on a fresh charge, to use ores and industrial waste containing oxidized and reduced alloying elements.