SHAFT-REVERBERATORY FURNACE FOR METAL REMELTING Russian patent published in 2015 - IPC F27B1/00 

FIELD: metallurgy.

SUBSTANCE: furnace includes a shaft, a melting chamber, a storage bath, which are restricted with bottoms and walls and have two arches, a pouring tap hole, a turning tray, a gas duct and a welded frame. In the shaft and the storage bath there are two working openings and a slag opening in the melting chamber, a device for lifting and lowering a damper of the shaft working opening; two gas burners are installed in the melting chamber and in the storage bath. The furnace has a steel box with heat insulation between it and each wall consisting of three layers of asbestos cardboard plates. Bottoms of the melting chamber and the storage bath are made of KS-90 No. 1 bottom blocks laid onto four layers of asbestos cardboard and a padding from chamotte powder mixed with chips from light-weight bricks. The furnace has a turning lined chute with a turning lined bowl for pouring into pouring equipment located in a service sector with an angle of 140°. Arches above the melting chamber and the storage bath have a heat-insulating coating, and a heat-insulating mullite glass-fibre layer of MLF-260 grade is laid from above them. The furnace is provided with a two-stage dust-gas cleaning system.

EFFECT: low heat losses; increased productivity and possibility of remelting of scraps not classified from foreign inclusions.

6 cl, 11 dwg