Preheating device of aluminum skimming melting furnace

The utility model relates to the technical field of melting furnaces, and provides an aluminum skimming melting furnace preheating device which comprises a supporting structure and a furnace body rotationally assembled on the supporting structure, and the furnace body comprises a heat preservation cavity, a preheating cavity and a melting cavity from outside to inside. The furnace body is provided with a feeding port and a discharging port which are communicated with the interior of the melting cavity, the heat preservation cavity is sequentially provided with a radiation reflection layer, an air interlayer, a heat preservation material layer and a heat preservation protection layer in a stacked mode from inside to outside, and vent holes are formed between the preheating cavity and the melting cavity in a penetrating mode. A water inlet pipeline is arranged in the preheating chamber, a combustion assembly is arranged in the melting chamber, and the combustion assembly comprises a combustion nozzle used for m