Comprehensive utilization method of granite type stone slab sawing mud tailings containing iron, feldspar, quartz and like

The invention discloses a comprehensive utilization method of granite type stone slab sawing mud tailings containing iron, feldspar, quartz and the like, and belongs to the technical field of comprehensive utilization of secondary resources of tailings. The method comprises the following steps of grading and grinding, low-intensity magnetic separation of iron, medium magnetic separation of iron, impurity removal through strong magnetism, hydraulic classification, impurity removal from the electromagnetic slurry, concentrating and dehydrating as well as precipitating and clarifying. According to the differences among the granularity, dissociation degree, specific susceptibility and the like of minerals, after screening and grinding, magnetite concentrate is separated by weak magnetic separation through a drum type magnetic separator, iron oxide concentrate is separated by magnetic separation through a plate type magnetic separator, ceramic-grade feldspar concentrate can be separated through a vertical ring hig