Use case · E40
The magnet took
more than the steel.
An overband magnet pulls the steel out of a shredded stream, and everything fixed to steel leaves with it. Matvision Refine takes those few pieces back off the belt, at a throughput a full sorting line cannot reach.
Up to 40 t/h
E40 in negative sorting
> 98 %
Final quality rate on the cleaned stream
10 – 200 mm
Particle size, overlapping pieces accepted
1 – 4
Robots, sized to the contaminant
What you gain
- The steel sold at the clean grade
- The copper sold as an output of its own
- Every category priced separately
What you avoid
- A lot downgraded at the buyer’s gate
- A picking result that changes with the shift
The stream
Downstream of the overband,
upstream of the buyer.
E40 arrives already largely clean: the shredder has broken the objects apart, the air classifier has taken the light fraction, and the overband has pulled the ferrous metals out. What remains in the load is what the magnet carried along with the steel, and a small share of it is enough to have the whole lot downgraded at the buyer’s gate.
| Where it comes from | Upstream equipment | Particle size | Contaminants by weight |
|---|---|---|---|
| Shredder line, ferrous fraction | Shredder, air classifier, overband magnet | 10 – 200 mm | Measured in the study |
| End-of-life vehicles and white goods | Pre-shredder, then the same line | 10 – 200 mm | Measured in the study |
| Production losses, ferrous fraction | Magnetic separation on the plant’s own scrap | Measured in the study | Measured in the study |
What we take out
Five categories, one pass.
Purification is not sorting. We do not classify every piece into a family; we find the few that should not be there and remove them. Each category leaves by its own chute, so what is pulled out is sold rather than discarded.
Output
Why the magnet took it
Why purify it
Purified steel
It is the steel the magnet was there for
The bulk of the load, cleared of what had it downgraded at the buyer’s gate
Meatballs and electric motors
A copper winding inside a steel casing
Copper is what gets a steel load downgraded, and it sells on its own once it is out
Aluminium attached to steel
An aluminium profile held by a single screw
Out of the load, it is worth far more than regular steel
Cables
Copper and insulation caught in the ferrous flow
More copper the mill does not want, and a cable output that sells
Rubber and non-metallics
Fragments that survived the air classifier
They have no place in a steel load
Stainless and weakly magnetic alloys
Magnetic enough to be carried along
Alloying elements the steel grade does not ask for, and an output with its own price
The line
One to four robots,
sized to the contaminant.
Sensing core
Matvision Sense: 3D, colour and X-ray transmission on every piece. LIBS when the contaminant is a question of alloy rather than of material.
Robots
One to four, following the density of what has to be picked. A line can start with fewer arms and grow with the stream.
Ejection
Robotic picking, pneumatic ejection, or both on the same line: arms on the pieces that need placing, air on the ones that only need removing.
Machines
The machine for this stream.
Refine removes what does not belong. Grade separates everything that has value.
To characterise the stream before deciding: Matvision Sense ↗
What a performance study measures
Your material, your numbers.
Two big bags are enough to start. We measure the composition of your E40 piece by piece, set the purity we can hold against the material you would lose with the contaminants, and write both into the offer as the figures we commit to. Every number on this page is then replaced by yours.