Technical Specifications
The SGM Polishing Drum Magnet (PDM) is anMega Drum Magnet provided with a special winding made of an anodized aluminum strip suitable to accommodate a fixed direct current setting control, thus allowing for maximum accuracy in the segregation of the electrical rotors. Maximum robustness is guaranteed since all mechanical parts are abundantly sized and designed for locking into each other through the largest contact sections. The main shaft is made of a single machined billet (no welding). PDM is provided with a counterweight for easy orientation of the polarities and a double manganese steel shell where the outer shell can be easily replaced in case of wear.
Operation
The SGM proprietary Polishing Drum Magnet (PDM) is designed to offer customers the possibility to significantly reduce the quantity of pickers typically used to decrease copper content in the ferrous shred coming off an automobile shredder. They are characterized by the presence of electrical rotors with copper windings (the so-called “meat balls”) ending up with the ferrous as a result of their ferrous armature. Polishing Drum Magnets (PDM) perform a split of the ferrous fl ow into two fl ows, a short drop fl ow where the meat balls are concentrated along with a minor part of the ferrous and, a positive fl ow made of most of the ferrous and meat balls reduced to a minimum. Starting from a typical copper content in the Ferrous shred of around 0,3%, the PDM reduces this copper content in the main fl ow to below 0,2% with a mass balance split between short drop fl ow and the positive one of 10%/90%.
Scrap with an iron content of less than 10% together with most rotors is discarded at a collection point (short flow). Materials composed of 10% to 90% iron and a minimum number of rotors, are attracted and held by the drum until released at a different collection point (positive flow).
In the process of selecting the PDM magnetic separator for copper cleaning, the percentage of this metal in the material collected in the positive flow drops from 0.3% to 0.2%.
The precision in the selection of the rotors is also due to the coating of the magnet with an anodized aluminum tape that allows you to set the desired continuous current flow.
The strength of the PDM model is guaranteed by the precise dimensions of all its mechanical components that allow a perfect gear between them.
The main shaft consists of a single seamless block.
The outer shell is made of a double layer of manganese steel, in which the outer layer can be replaced in the event of wear.
The magnet is also equipped with a counterweight so that it can be directed according to the applications.
PDM Models
SGM Magnetics produces 10 different models based on:
- Size
- Diameter of magnets and side flanges
- Magnet weight
- Magnet power
- Rotational speed
- Maximum working distance between drums and material to be selected
- Number of gills on the body
- Engine force required
- Processed materials
Processed Material
