Waste heat utilization system of rotary kiln for roasting zinc-containing oxidized ore

The utility model discloses a waste heat utilization system of a rotary kiln for roasting zinc-containing oxidized ore. The device comprises a rotary kiln, a guide pipe is fixedly connected to the upper surface of the rotary kiln, a drainage fan is installed on the guide pipe, a conversion piece is arranged at one end of the guide pipe, and a filter cartridge is arranged on one side of the conversion piece. According to the utility model, integral design is adopted; residual heat in the rotary kiln is guided away by the drainage fan; hot air flows in the coiled pipe containing more flow limiting grooves; hot air flow can be delayed in the coiled pipe; the contact time of hot air flow and cold water is prolonged; the hot air flow finally enters the water storage barrel along the drainage pipe, residual heat contained in the hot air flow is converted again, and the hot air flow and the water storage barrel are matched for conversion, so that the conversion efficiency of the rotary kiln is effectively improved,