Slag waste heat gradient utilization and recovery energy-saving system

The invention relates to the technical field of industrial slag heat source recycling and energy saving, and particularly discloses a slag waste heat gradient utilization and recycling energy-saving system which comprises a liquid slag recycling system and a solid slag recycling system. The liquid slag recovery system comprises a recovery furnace, a liquid slag runner arranged in the recovery furnace and an in-furnace heat exchanger, the in-furnace heat exchanger is connected with a high-grade heat storage tank through a pipeline, the tail end of the liquid slag runner extends out of the recovery furnace and is provided with a pressure spray cooling system, and liquid slag enters the solid slag recovery system after being rapidly stamped and cooled; the solid slag recovery system comprises a cooling water tank and a solid slag conveyor arranged in the cooling water tank and used for conveying slag, and the cooling water tank is connected with a water tank heat exchange assembly through a pipeline. The inventi