DEVICE AND METHOD FOR PRE-HEATING OF METAL CHARGE FOR SMELTING UNIT Russian patent published in 2015 - IPC C21C5/52 F27D13/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, namely to the pre-heating and supply of a metal charge to a receiver of a smelting unit. The device includes at least a supply passage made so that the metal charge can be moved along it and supplied to the receiver. Above the supply passage there located is at least a cap restricting a tunnel, having a possibility of moving inside it of at least a part of flue gases leaving the above receiver. At least some section of the cap includes an expansion system located above at least some part of the metal charge and having a possibility of provision of expansion and retention of the flue gases inside it during the minimum required time comprising at least 1.5 seconds till the flue gases contact the above said metal charge.

EFFECT: use of the invention provides the combustion of unburnt gases and deposition on the metal charge of solid particles and dust of the flue gased.

17 cl, 9 dwg