20t/h 35r/Min Wet Drum Magnetic Separator Machine For Mineral Processing

Magnetic separators can be found in most mineral processing operations, especially those processing non-metallic minerals and magnetic ores. This article investigates the use of high intensity magnetic separators and magnetic separation equipment in the minerals sector with a focus on processing dry materials (in the -15mm, +45 micron size range).

There are three magnetic properties of minerals. Each type enables separation using industrial magnetic equipment and are:

• Paramagnetic: Minerals that are only slightly affected by an applied magnetic field. They move towards concentration in lines of magnetic flux (e.g. hematite, ilmenite, and chromite).
• Ferromagnetism: Minerals capable of achieving a high degree of magnetic alignment (e.g. magnetite).
• Diamagnetism: A mineral (e.g. silica) that is very weakly repelled by the pole of a strong magnet. When a magnetic field is applied, a diamagnetic mineral will develop a magnetic moment through induction but in the opposite direction and is therefore repelled.

The magnetic separation of minerals is based on a three-way competition between:

• Magnetic forces;
• Gravitational or inertial forces;
• Inter-particle attractive and repulsive forces;

The combination of these forces determines the outcome of any given magnetic separation and is much affected by the nature of the feed such as size distribution, magnetic susceptibility and other physical and chemical characteristics.

Structure: The magnetic separator is mainly composed of drum, roller, brush roller, magnetic system, tub and transmission parts. Cylinder is rolled welding by 2-3 mm stainless steel plate, and the end cover is aluminum casting connected by stainless steel screw and barrel. Motor regulates motor speed through the reducer, which drives the cylinder and magnetic roll do rotary motion. Magnetic system is open, installed in inside cylinder and all bared magnetic. Magnetic block is installed in the plate of yoke by stainless steel bolt, and the shaft of the yoke is out of the barrel. The end shaft is fixed with turn arm, which can adjust the magnetic system angle. The working area of trough is made up with stainless steel, and the frame and other parts of the cell body is welded with ordinary steel.