Sand mill discharge cooling system with iron removal effect

The sand mill discharge cooling system with the iron removal effect is simple in structure, small in occupied space and convenient to use, and has a powerful iron removal function. Cooling water enters from the cooling water inlet, sufficiently exchanges heat with a material pipe and then flows back to the cooling water machine from the cooling water outlet, a discharging pipe of the sand mill is connected with a material feeding opening in the lower section of a material feeding pipe of the cooling system, and ground material slurry enters the water inlet cavity and enters the material U-shaped pipe through a water opening in the top. After heat exchange with cooling water is completed, the slurry is collected in the water return cavity and enters a main pipe of a material feeding pipe, when flowing in the main pipe, the slurry flows through the magnetic bar to adsorb and filter magnetic impurities in the slurry, and finally the slurry is discharged out of a cooling system through a quick-change connector on