MELTING FURNACE Russian patent published in 2010 - IPC F27B17/00 

FIELD: metallurgy.

SUBSTANCE: furnace consists of case with installed therein melting section equipped with facility for charge supply and burner and electro-thermal section divided from melting section with partition not reaching hearth; also melting section is equipped with electrodes, electric holders, devices for metal and slag tapping and with gas duct. A lower edge of the partition is positioned above the level of the slag tapping device thereby forming a gas-overflow port of alternate cross section with the level of melt. The metal tapping device is equipped with a well communicated with an overflow zone of the partition via a channel. Section of the port is chosen according to specified ratio of furnace width to inter-axis distance between electrodes. The charge supply facility has a chute superposed on a stepped hearth with incline to a partition side.

EFFECT: treatment of lead concentrate of current production of raised humidity (up to 4-6%) ensuring additional recovery of metal from volatile dust-gas components by transmitting them through electro-thermal section; reduced exhaust of lead containing dust.

1 dwg