Energy-saving preheating roasting system for low-quality spodumene

The utility model relates to the technical field of spodumene roasting, in particular to an energy-saving preheating roasting system for low-quality spodumene, which comprises a rotary kiln, a material distribution temperature control system, a plurality of cyclones, a smoke chamber and a roasting kiln. Connecting air pipes are arranged between air outlets of the adjacent cyclones, the multiple cyclones are sequentially arranged from top to bottom, a catalytic denitration device communicated with the uppermost connecting air pipe is arranged at the uppermost connecting air pipe, an electric dust collector communicated with the catalytic denitration device is arranged on one side of the catalytic denitration device, and a monitoring system used for monitoring the NOx content is arranged in the smoke chamber. And a detection system for detecting the granularity of spodumene is arranged on the material distribution temperature control device. According to the NOx content of the smoke chamber, the temperature of