What to know about the factors affecting magnetic separation in magnetic separators

Magnetic Separators are often seen in mining equipment and play a very important role. However, when using a magnetic separator, problems with the magnetic separation effect are often encountered. So, do you know what factors affect the magnetic separation effect of a magnetic separator?

1. Rotational speed of the magnetic separator cylinder

The rotational speed of the magnetic separator cylinder has a significant impact on the processing capacity. The higher the rotational speed of the cylinder, the greater the processing capacity; conversely, the lower the rotational speed, the smaller the processing capacity. Generally speaking, magnetic separators with smaller diameters tend to adopt higher rotational speeds. For instance, a 600mm diameter magnetic separator uses a rotational speed of 40r/min. For larger diameters, a lower rotational speed will be adopted. For example, for a diameter of Φ750mm, a rotational speed of 36r/min is used.
2. Magnetic system deflection Angle of the magnetic separator

Generally, magnetic separators officially produced by the state are equipped with an indication device for the magnetic system deflection Angle on the transmission shaft head. The size of the magnetic system deflection Angle can be adjusted by turning the nut.

If the magnetic system deflection Angle is too large or too small, it will affect the magnetic separation efficiency of the magnetic separator. If the deflection Angle is too small, it will affect the quality of the concentrate, giving mineral particles with a small magnetic system the opportunity to be separated. If the deflection Angle is too large, only minerals with strong magnetism will be separated, and there will be almost no chance to separate minerals with weak magnetism. Therefore, it will improve the quality of the concentrate, but it will increase the grade of the tailings and thereby reduce the recovery rate.

The commonly used magnetic system deflection Angle in general processing plants is 15° to 20°. The specific deflection Angle for each processing plant should be determined based on the operation requirements. After adjustment, if the operating conditions and requirements during production remain unchanged, it is best not to make any changes.

3. The gap between the magnetic separator cylinder and the bottom of the tank

The size of the gap between the cylinder and the tank of the magnetic separator is one of the factors affecting the magnetic separation efficiency of the magnetic separator. If the gap is too small (i.e., the distance between the cylinder skin and the tank is too close), the pulp will not pass through smoothly, affecting the processing capacity. At the same time, due to the high magnetic field intensity, strong magnetic and weak magnetic minerals will be separated together, thereby reducing the quality of the concentrate. If the gap is too large, the separation force for minerals with weak magnetic systems will be reduced. Although the quality of the concentrate is improved, the recovery rate is decreased.

The above are the factors that affect the magnetic separation effect of the magnetic separator. If you understand these factors, I believe everyone will be able to choose the magnetic separator better and solve problems more effectively.