BHS offers an established and optimized process for metal recovery from fine fractions. This consists of pre-sorting and the key process step of shredding, which is performed by a rotor impact mill, easily accomplishing multiple challenging processing tasks at once. The process then moves on to the steps of sorting via screens, standard separation as well as magnetic and eddy current separation. Each plant is individually adapted to the customer’s requirements due to the large variance of the input material.
Fine fractions smaller than 25 mm from automotive shredder residue (ASR), waste electrical and electronic equipment (WEE), and incinerator bottom ash (IBA) all contain numerous valuable metals, from copper and aluminum to gold and platinum. BHS-Sonthofen has dedicated itself to helping its customers recover these valuable metals as efficiently as possible. The result: the high recovery rates and high purity of the recovered metal concentrates speak for themselves.
Pre-crushed input material up to a particle size of 25 mm is optimally processed. The goal is to produce the purest metal concentrates. The two most important process steps, crushing and sorting, are ideally matched to the respective feed material.
Screen and zigzag sifters sort out larger particles with a particle size above 25 mm. Continuous dedusting also minimizes wear on downstream components.
The BHS rotor impact mill (RPMX) forms the heart of our process: This unique high-performance crusher provides efficient and selective loading of the feed material. This is the crucial basis for reliable sorting. In the standard process, the material runs through the machine several times in a “cycle.” If desired, several rotor impact mills can be connected in series for a continuous process with increased throughput.
 Sorting (screens)
Screens separate the crushed and optimally pelletized material into predefined size fractions for efficient further refining to guarantee high purity and recovery rates. Different screen sections provide flexibility.
 Separation (separating tables)
Excellent upstream pelletizing is decisive in order to obtain pure metal concentrate (copper, aluminum, etc.). Further separation into light and heavy fractions takes place on the separating tables, with the width of the screen section determining the ideal separation efficiency. Optimized separation of the output material is achieved by various setting options of the process parameters and adjustments to the individual input material.
 Magnetic and eddy current separation
Magnetic technology separates the valuable metal-bearing fractions into a magnetic and a non-magnetic part. The latter then passes through eddy current separation to achieve pure metal concentrates. These are now highly pure and directly salable.
 Optional accessories
Depending on the material and customer requirements, individual extensions of the sorting technology (for example, sensor-based technology) are available.
Whether pre-shredded end-of-life vehicles (ASR), electrical and electronic waste (WEEE) or incinerator bottom ash (waste incineration plant), they all have one thing in common: they contain valuable metals that are always worth recovering. This makes processing residual and fine fractions smaller than 25 mm in particular extremely important. BHS offers an established and effective process to achieve this. This consists of pre-sorting and the key process step of shredding, which is performed by a rotor impact mill, which easily accomplishes multiple challenging processing tasks at once. The process then moves on to the steps of sorting via screens, standard separation as well as magnetic and eddy current separation. Each plant is individually adapted to the customer’s requirements due to the large variance of the input material.
Large-scale tests to determine the wear pattern: efficient production machines are created on the basis of testing. Key operating parameters need to be defined in advance before the tests are carried out. The variety of materials demands an innovative process that always ensures the highest yield of high-quality metals through continuous further development. The high variance of the input material requires each plant to be individually adapted to the customer’s needs. The experts at BHS-Sonthofen therefore adapt each system to the specific feed material and your requirements based on our standard process. Defined tasks and special tools ensure that the project is completed efficiently.
Our testing capabilities include large-scale tests of the standard process with original customer material on a production scale, the implementation of optional process steps, and individual tests of all shredding machines as well as the separation and sorting technology. In addition, we offer comprehensive, standardized test evaluations (grading curves, etc.) and use the test results for further process optimization. They also serve as a basis for detailed plant engineering and for an individual profitability calculation of the customer’s project.