Pyrolysis rotary kiln for treating zinc-containing waste paint

The invention relates to a pyrolysis rotary kiln for zinc-containing waste paint treatment. The pyrolysis rotary kiln comprises a barrel, a pyrolysis gas conveying pipeline, a semi-coke slag returning spiral pipeline, a heat carrier conveying spiral pipeline, a combustor and a transmission device. And the pyrolysis gas conveying pipeline, the semi-coke slag returning spiral pipeline and the heat carrier conveying spiral pipeline are arranged on the cylinder body. The interior of the cylinder is divided into a pyrolysis area and a calcination area which are isolated from each other. A feeding cover is arranged on one side of the pyrolysis area, a slag discharging cover is arranged at one end of the calcination area, and a smoke outlet is formed in the other side of the calcination area. One end of the pyrolysis gas conveying pipeline is communicated with one side of the pyrolysis area, and the other end of the pyrolysis gas conveying pipeline is communicated with one side of the calcination area. One end of th