Method and system for producing titanium concentrate by utilizing intermediate tailings

The invention is suitable for the technical field of mineral processing technology, and provides a method and system for producing titanium concentrate by using intermediate tailings, and the method comprises the following steps: carrying out first magnetic field grading on raw ore to obtain first magnetic field tailings; the first magnetic field tailings are sorted through a second magnetic field, rough concentrate is obtained, and the intensity of the second magnetic field is larger than that of the first magnetic field; the rough concentrate is graded, and undersize materials are obtained; and the undersize materials are subjected to flotation, and titanium concentrate is obtained. The method and the system are simple in process flow, only comprise weak magnetism, strong magnetism, grading and flotation, comprehensively utilize tailings in the existing auxiliary flow, effectively improve the recovery efficiency of iron resources and titanium resources in the vanadium titano-magnetite, reduce the loss of ta