Thermal insulation structure of rare earth rotary kiln

The utility model discloses a heat preservation structure of a rare earth rotary kiln, and relates to the technical field of rotary kiln equipment. Comprising an outer cylinder of the rare earth rotary kiln and further comprises a heat insulation layer, a heat preservation layer, a supporting layer and a refractory layer which are arranged on the inner wall of the outer cylinder, and heat preservation nails are embedded in the supporting layer and the refractory layer; the heat insulation layer, the heat preservation layer, the supporting layers and the fireproof layer are sequentially distributed from the inner wall of the outer barrel to the interior of the outer barrel, and the multiple sets of supporting layers are arranged in parallel and evenly distributed in the extending direction of the axis of the outer barrel. The two ends of the heat preservation nails are embedded in the supporting layer and the fireproof layer correspondingly and used for connecting and fixing the supporting layer and the firepr