Aluminium Recycling Plants

Aluminium has been recycled since it was first commercially produced and today secondary aluminium accounts for about one-third of world aluminium consumption.(BAS® Aluminium Recycling Plant – Ferrous / Non Ferrous Metal Separation).

In order to maximise the yield of the different scraps melted, they must be pre processed to get them in the best state for handling, charging and melting. It is important to be able to charge the scrap to the furnace at a rate greater than the melt rate of the furnace. There are a number of processing techniques that can be employed to present the scrap in the most suitable form. Some scraps may require several processes.

Hand Sorting

The practice of manual sorting is still considerably widespread. Manual sorting results in high purity levels, but because the labor cost is high this process serves only as a final check for quality control purposes.

Comminution

The scrap occurs in a great variety of shapes and dimensions, so the comminution is aimed to reduce this scatter. The objectives of comminution are obtaining a proper distribution of scrap size, which is required by the subsequent steps; to increase the bulk density and liberate components that form assemblies. The comminution can directly affect the melting rate with the scrap size, but the main advantage is the possibility to remove undesired materials as rubber, magnesium, and zinc parts from the Al alloy.

BAS ElectroMagnetic & Magnetic Over-Band Ferrous Metal Separators (EMBS & MBS)

Magnetic separation is a way to separate non-ferrous from ferrous components and it is extensively used in secondary Al industry. A wide variety of separators are available to perform this task. The most common are BAS dry drum magnetic separators, BAS EMBS (Electromagnetic Overband Metal Separators – BAS®) and BAS MBS (Permanent Magnetic Overband Metal Separators – BAS®), which differ mainly for the plant layout. Scrap moves on a conveyor belt and passes under over-band metal separators equipped with an magnet or electromagnet and the ferrous components exposed to the magnetic field are separated from the aluminum scrap, but still, the Al scrap may contain many impurities such as rubber, plastic, wood, bonded components, etc.

BAS Dry Drum Magnetic Separators

The BAS dry drum magnetic separator is common type of equipment for separating magnetic particles from nonmagnetic particles or relatively strong magnetic particles from relatively weak magnetic particles based on magnetic susceptibility, particle size and shape. The our equipment (Dry Type Drum Magnetic Separators – BAS® (bas-tr.com) is widely used in various industries, including the production of selectively concentrated ferruginous chromite ore or hematite, iron ore minerals separation, separation of magnetic materials from steelmaking slags, purification of nonmetallic ores, food and plastic processing, Al and Iron&Steel Recycling Plants.

BAS ECS Eddy Current Non-Ferrous Metal Separators

These systems are based on inducing eddy currents in the metals. A time-variable magnetic field, following the Faraday law, generates electromotive forces perpendicular to the magnetic field. If the magnetic field is within a conductive material, the induced forces generate currents in the material, the eddy currents that depend on the material conductivity. The BAS ECS eddy-current non ferrous metal separator (Eddy Current Non-Ferrous Metal Separators – BAS®) is a conveyor tape with a particular magnetic field in the head, which is generated by a high frequency magnetic drum. When the non-ferrous metals approach the magnetic field, they are lifted and rejected to an appropriate collecting chute while the inert materials freely fall down to an another collecting chute. Metals with different conductivity produce various eddy currents and will be thrown away at different distances.

Please contact the BAS team for our product portfolio and the right equipment selection.