METHOD FOR MELTING METAL MATERIAL IN MELTING UNIT AND MELTING PLANT Russian patent published in 2017 - IPC C21C5/52 F27B3/08 F27B3/18 

FIELD: metallurgy.

SUBSTANCE: at the loading stage, the first sub-operation is carried out, on which said metal material is loaded in an amount from 25 to 45% of total amount of molten material which is contained inside the furnace before the tapping stage and subjected to tapping after completion of the melting stage, the second charging and melting operation, at which the rate of metal material supply is reduced by means of a control device, to maintain the amount of solid mass of said metal material in gradually formed liquid metal bath, the third sub-operation, in which the feed rate is further reduced until stopping of loading process to ensure complete melting of all metal material in the melting furnace. The tapping stage is performed when the entire mass of solid metallic material is melted. The melting furnace comprises a roof covering the body and made separate from the latter, and a panel arranged between the body and the roof. There is a hole in the panel for installing said supply means there through. Said body has depth D and the lower edge of said opening is distanced in height from the lower edge of the panel by distance from 0.3 to 3D.

EFFECT: invention makes it possible to reduce heat losses from the bath of molten metal, reduce wear of heat-resistant coating of the furnace walls, and reduce maintenance time.

14 cl, 5 dwg