Self-preheating reciprocating rotary kiln

The utility model discloses a self-preheating reciprocating rotary kiln, and belongs to the technical field of rotary kilns. Comprising a rotary kiln barrel and a feeding auger barrel. The end, provided with the feeding and discharging cover, of the outer side of the rotary kiln barrel is a first end, the other end is a second end, and the rotary kiln barrel is driven by the barrel driving device to rotate. And a concentric feeding auger cylinder is arranged in the rotary kiln cylinder. And a spiral feeding shaft is arranged in the feeding auger cylinder body and is driven by a feeding driving device to rotate. An external rotating blade is arranged on the outer side of the feeding auger cylinder; materials can be conveyed to the first end from the second end of the rotary kiln barrel through relative rotation of the external rotating blades and the rotary kiln barrel. According to the rotary kiln, self-preheating of materials in the barrel of the feeding auger can be achieved through high-temperature shieldi