Waste heat recovery system for laterite-nickel ore RKEF process slag flushing water and use method

The invention relates to the technical field of comprehensive utilization of industrial waste, and provides a waste heat recovery system for laterite-nickel ore RKEF process slag flushing water and a using method, the waste heat recovery system comprises a slag flushing pool, a water storage pool, a first heat exchanger, a second heat exchanger, a turbine, a generator and a grid-connected control cabinet; the slag flushing pool is connected with the water storage pool through a slag flushing water pipeline, the first heat exchanger is arranged in the water storage pool and connected with the turbine through a working medium outlet pipeline for heat exchange, the turbine is connected with the second heat exchanger and the generator, and the generator is connected with the grid-connected control cabinet. A working medium pump and a radiator are connected outside the second heat exchanger through a working medium cooling pipeline, and the second heat exchanger is connected with the first heat exchanger through a