Environment-friendly purification device for waste residue and waste gas of magnesium metal heat accumulator reduction furnace

The utility model relates to a waste gas treatment device, in particular to an environment-friendly purification device for waste residue and waste gas of a magnesium metal heat accumulator reduction furnace. The technical problem to be solved is that the temperature of waste flue gas generated by a heat storage furnace body in an existing magnesium metal smelting reduction section is low before the waste flue gas is sent to a waste heat boiler. Comprising a thermal reduction slag device and a flue gas conveying device, the thermal reduction slag device comprises a chain elevator, a drum-type heat exchanger, a conveyor, a bucket elevator and a cold slag system storage bin, and the flue gas conveying device comprises a heat storage reduction furnace tail exhaust fan, a flue, a drum-type heat exchanger, a cyclone dust collector and an off-line pulse bag-type dust collector. Thermal reduction slag in a reduction workshop reversely flows through a drum-type heat exchanger to perform sufficient heat exchange with