Water slag flushing nozzle of blast furnace

The invention belongs to the technical field of blast furnace water slag flushing, and discloses a blast furnace water slag flushing nozzle which comprises a slag flushing vertical tower, an upper water spraying pipe, a side water spraying pipe, a bottom water spraying pipe and a slag storage pool. The upper water spraying pipe is arranged at the top of the slag flushing vertical tower and sprays water downwards from the top of the slag flushing vertical tower; a feeding window is formed in the upper part of the slag flushing vertical tower, and the height of the feeding window is lower than the pipe orifice of the upper water spraying pipe; a side water spraying opening is formed in the side wall of the slag flushing vertical tower, is communicated with the side water spraying pipe and sprays water into the slag flushing vertical tower in the side direction; the bottom end of the slag flushing vertical tower is communicated with the top of the slag storage tank; the bottom water spraying pipe is arranged at