Overflow-discharge-type magnetic hydrocyclone

The invention relates to an overflow-discharge-type magnetic hydrocyclone. The technical scheme is that the lower end of an overflow tube (3) is positioned on the middle part or the lower part of a cylinder body (9); the upper end of a central magnetic bar (5) is welded on a port at the lower end of the overflow tube (3) through 2-4 connecting fins (4); the lower end of the central magnetic bar (5) is in flush with the lower end of an upper conical body (8), and the diameter of the central magnetic bar (5) is 0.2-0.3 times of the inner diameter of the overflow tube (3); the overflow tube (3), the connecting fins (4), the central magnetic bar (5), the upper conical body (8) and the cylinder body (9) all adopt magnetic materials; a top cover (11), an ore feeding block (10) and a lower conical body (7) all adopt nonmagnetic materials; one ends of four U-shaped iron cores wound with coils (1) are respectively welded on the outer wall of the overflow tube (3) extending out of the top cover (11), and the other ends of the four U-shaped iron cores wound with coils (1) are respectively welded on the outer wall of the cylinder body (9); and the U-shaped iron covers (2) wound with the coils are arranged in a 'cross-shaped' central symmetrical mode. The overflow-discharge-type magnetic hydrocyclone provided by the invention has the advantages of low cost, energy consumption conservation, long service life, convenience in operation, high classification efficiency and adaptability to industrial application.