METHOD TO MELT STEEL IN STEEL-MAKING VESSEL (VERSIONS) Russian patent published in 2014 - IPC C21C5/00 C21C7/00 C21B13/12 

FIELD: metallurgy.

SUBSTANCE: in the first version of the method they continuously load previously heated metal charge into a furnace, at the same time in process of melting they continuously add a gas-forming synthetic composite material into a metal bath, and the material is represented by bars made of an iron-carbon alloy and a solid oxidant, in the amount of 1.0-10.0% of the metal charge mass, at the certain ratio of components, besides, the gas-forming synthetic composite material is heated to 100-900°C and entered to the hearth of the furnace in a separate flow, together with the metal charge flow, with a layer of not more than 0.5 m. In the second version of the method - in process of melting they continuously add a gas-forming synthetic composite material into a metal bath, and the material is represented by bars made of an iron-carbon alloy and a solid oxidant, in the amount of 11.0-50.0% of the metal charge mass, also at the certain content of components, besides, a part of the gas-forming synthetic composite material in the amount of 1.0-10.0% of the metal charge mass is heated to 100-900°C and entered to the hearth of the furnace in a separate flow, together with the metal charge flow, in a layer of not more than 0.5 m, and the remaining quantity of the gas-forming synthetic composite material is distributed in the composition of the metal charge flow prior to its introduction into the metal bath.

EFFECT: invention makes it possible to increase efficiency, to reduce power costs, also due to lower requirements to quality of metal charge preparation, intensification of a process of metal mixing in the area of its feed, reduced costs of a carburising material for melting of steel.

6 cl, 2 tbl