Energy-saving system and method for extracting titanium

An energy-saving system for extracting titanium, comprising a raw material predrying kiln, a preheating kiln, a reduction rotary kiln, a cooling rotary kiln, a ball mill, a magnetic separator, a reduced iron powder drying kiln, a blank prefabricator, a blank drying kiln, a sintering furnace, a fused salt electrolysis tank, a titanium cleaning device, a filtering device, a vacuum dryer, a waste heat boiler, and a steam turbine generator, wherein

• an outlet of the raw material predrying kiln communicates with a top inlet of the preheating kiln;
• a bottom outlet of the preheating kiln communicates with a kiln tail of the reduction rotary kiln;
• an outlet at a kiln head of the reduction rotary kiln communicates with an inlet at a kiln tail of the cooling rotary kiln;
• an outlet at a kiln head of the cooling rotary kiln is connected to the ball mill, the magnetic separator, the blank prefabricator, the blank drying kiln, the sintering furnace, the fused salt electrolysis tank, the titanium cleaning device, the filtering device, and the vacuum dryer in sequence;
• the reduced iron powder drying kiln communicates with an iron powder discharge port of the magnetic separator;
• a CO outlet of the fused salt electrolysis tank communicates with a CO inlet of the preheating kiln;
• a flue gas outlet of the preheating kiln communicates with a flue gas inlet of the waste heat boiler;
• a steam outlet of the waste heat boiler communicates with a steam inlet of the steam turbine generator;
• a flue gas outlet of the waste heat boiler communicates with flue gas inlets of the raw material predrying kiln, the cooling rotary kiln, the blank drying kiln, and the reduced iron powder drying kiln;
• and
• a flue gas outlet of the cooling rotary kiln communicates with a flue gas inlet of the preheating kiln.