Mining and Mineral Industry – Magnetic Application
Mining is a process of extraction of minerals from mines. Using various techniques and machines mines are quarried in order to recover various types of minerals like iron, coal, copper, mica, etc. which are further used in various industries. Minerals after being quarried consist of various types of ferrous and non ferrous contaminants. These contaminants are removed from the minerals in order to recover fine quality pure minerals.
Devices that are popularly used for removing ferrous contaminants from the minerals are various types of magnetic separators. Following are the magnetic separators that are used widely in mineral and mining industry:
Wet Drum Separators
Wet drum separators are widely used magnetic separators used in mineral industries especially in coal mines. They are infact used to recover ferro silicon or other magnetic fines in dense media plants. They enhance both the plant productivity and product purity by removing contaminants. Wet drum separators can even remove very fine and weak contaminants even from dense materials. Due to this they are useful in those applications where product purity is given prime importance.
Drum magnets are used for removing ferrous contaminants from a wide range of free-flowing bulk and granular materials in high-volume applications. Minerals like coals, mica etc consist of many other ferrous and non ferrous fine. These ferrous fines are captured by the the magnetic assembly which is inside the unit’s shell. After the contaminants are removed, the cleaned product falls freely to a discharge point. There is a cleat that sweeps the ferrous debris through and out of the magnetic field.
Over Band Magnetic Separator
Overband magnetic separators are quite similar to the suspended magnets which are fabricated and configured to trap and hold the tramp metal rom the product carried by the conveyor. The magnets that are used in these types of separators are either ceramic or powerful rare earth magnets.
Overband magnetic separators are housed in stainless steel structure. They can be installed either above or below the passage of material flow. Due to their versatility and productivity , they are utilized in various mining and mineral industry.
Suspended Plate Magnets
In suspended plate magnets, from free flowing granular products metallic contaminants usually tramp iron are pulled up. The contaminants are collected on the self cleaning magnetic separator belt which are discharged through hopper. The occasional tramp iron materials are removed by suspended magnets from conveyor belt, vibratory feeder or gravity chute.