Suspension roasting system for carbon-containing gold ore

The invention provides a suspension roasting system for carbon-containing gold ore. A feeding bin is opposite to a screw feeder, and the screw feeder is opposite to a venturi dryer; the venturi dryer,a first cyclone preheater, a second cyclone preheater and a pre-oxidation suspension roaster are connected in series, the upper part of the pre-oxidation suspension roaster is connected with the thermal separation cyclone through a pipeline, the thermal separation cyclone, a first flow sealing valve and a strong oxidation suspension roaster are connected in series, and the strong oxidation suspension roaster communicates with an oxygen gas source and a nitrogen gas source; a discharging outlet of the strong oxidation suspension roaster, a second flow sealing valve, a first cooling cyclone, asecond cooling cyclone, a third cooling cyclone and a collection bin are connected in series; and a collection bin, an ore grinding machine, a collection tank, a first slurry pump, a leaching tank, asecond slurry pump and a fi