Smelting device for rare-earth metal production with function of tail gas treatment

The invention relates to the technical field of smelting of rare-earth metals, and discloses a smelting device for rare-earth metal production with a function of tail gas treatment. The smelting device comprises an electric furnace and a door rack which is parallelly arranged on the outer side of the top of the electric furnace. A guide rail is fixedly connected with one side of the top of the door rack, a flue gas hood is arranged at the tops of the door rack and the guide rail, a blower assembly is fixedly connected with one side of the top of the flue gas hood, and an output end of the blower assembly is fixedly connected with a cyclone dust collector. According to the smelting device, a trunnion and a furnace body are driven by a motor and a reduction motor of the electric furnace to rotate downwards together along a rotary rack, therefore, slag floating on the upper surface and rare-earth metal liquid are discharged from discharging outlets respectively; a movable cover is slidably connected with the guide rail through a power pulley and a driven pulley, therefore, the movable cover can be separated from a fixed cover or combined with the fixed cover, and it is convenient formaintenance personnel to check and maintain the inside of the flue gas hood; through asbestos wire gauze, the service life of the fixed cover and the movable cover can be prolonged.