Magnetic separators are essential equipment for selecting iron powder, commonly used in selection plants, sea sand iron selection, and iron powder refining. The two most common types of wet magnetic separators are the downstream magnetic separator and the semi-upstream magnetic separator.

1. The downstream magnetic separator features the slurry moving in the same direction as the cylinder's rotation or the product's movement. The slurry directly enters the magnetic system below the cylinder from the feed box. Non-magnetic and weakly magnetic particles are discharged through the gap between the two bottoms below the cylinder. Magnetic particles are attracted to the cylinder surface and rotate with it to the weaker magnetic field at the edge of the magnetic system, where they are discharged into the concentrate tank via the ore discharge water pipes. The downstream magnetic separator has a simple structure, high processing capacity, and can be used in series with multiple units. It is suitable for coarse and fine separation of strongly magnetic ores with particle sizes of 6 to 0 mm, or for recovering magnetic heavy media.

2. The semi-countercurrent magnetic separator features that the ore pulp enters the separation space in a loose suspended state from below the tank, with the pulp movement direction being basically the same as the magnetic force direction. Therefore, the mineral particles can reach the surface of the cylinder with a high magnetic force. Additionally, the tailings are discharged through the tailings holes on the bottom plate, thus maintaining the level of the pulp in the tank by controlling the overflow height. These two characteristics determine that the semi-countercurrent magnetic separator can achieve higher concentrate quality and metal recovery rates. As a result, it is widely used for the rough and clean separation of strongly magnetic ore with fine particles (less than 0.2mm). This magnetic separator can be used in series with multiple units to enhance the concentrate grade.